---
_id: '60580'
abstract:
- lang: eng
  text: <jats:title>Abstract</jats:title><jats:p>AlInP (001) is widely utilized as
    a window layer in optoelectronic devices, including world‐record III‐V multi‐junction
    solar cells and photoelectrochemical (PEC) cells. The chemical and electronic
    properties of AlInP (001) depend on its surface reconstruction, which impacts
    its interaction with electrolytes in PEC applications and passivation layers.
    This study investigates AlInP (001) surface reconstructions using density functional
    theory and experimental methods. Phosphorus‐rich (P‐rich) and indium‐rich (In‐rich)
    AlInP surfaces are prepared with in situ monitoring of the process by reflection
    anisotropy (RA) spectroscopy and confirmed by low‐energy electron diffraction
    and photoemission spectroscopy. The experimental RA spectra closely match the
    theoretical predictions obtained by solving the Bethe–Salpeter equation. It is
    shown that missing hydrogen on P‐rich surfaces and formation of In–In 1D atomic
    chains on In‐rich surfaces introduce mid‐gap surface states that pin the Fermi
    level and induce band bending. Time‐resolved two‐photon photoemission measurements
    reveal ultrafast near‐surface electron dynamics for both P‐rich and In‐rich surfaces,
    demonstrating photoexcited electrons reaching the surface conduction band minimum
    and relaxing to mid‐gap surface states on about hundreds of fs. This work provides
    the most extensive AlInP surface analysis to date, allowing for more targeted
    surface and interface engineering, which is crucial for the optimization and design
    of III‐V heterostructures.</jats:p>
author:
- first_name: Mohammad Amin
  full_name: Zare Pour, Mohammad Amin
  last_name: Zare Pour
- first_name: Sahar
  full_name: Shekarabi, Sahar
  last_name: Shekarabi
- first_name: Isaac Azahel
  full_name: Ruiz Alvarado, Isaac Azahel
  id: '79462'
  last_name: Ruiz Alvarado
  orcid: 0000-0002-4710-1170
- first_name: Jonathan
  full_name: Diederich, Jonathan
  last_name: Diederich
- first_name: Yuyings
  full_name: Gao, Yuyings
  last_name: Gao
- first_name: Agnieszka
  full_name: Paszuk, Agnieszka
  last_name: Paszuk
- first_name: Dominik C.
  full_name: Moritz, Dominik C.
  last_name: Moritz
- first_name: Wolfram
  full_name: Jaegermann, Wolfram
  last_name: Jaegermann
- first_name: Dennis
  full_name: Friedrich, Dennis
  last_name: Friedrich
- first_name: Roel
  full_name: van de Krol, Roel
  last_name: van de Krol
- first_name: Wolf Gero
  full_name: Schmidt, Wolf Gero
  id: '468'
  last_name: Schmidt
  orcid: 0000-0002-2717-5076
- first_name: Thomas
  full_name: Hannappel, Thomas
  last_name: Hannappel
citation:
  ama: 'Zare Pour MA, Shekarabi S, Ruiz Alvarado IA, et al. Exploring Electronic States
    and Ultrafast Electron Dynamics in AlInP Window Layers: The Role of Surface Reconstruction.
    <i>Advanced Functional Materials</i>. Published online 2025. doi:<a href="https://doi.org/10.1002/adfm.202423702">10.1002/adfm.202423702</a>'
  apa: 'Zare Pour, M. A., Shekarabi, S., Ruiz Alvarado, I. A., Diederich, J., Gao,
    Y., Paszuk, A., Moritz, D. C., Jaegermann, W., Friedrich, D., van de Krol, R.,
    Schmidt, W. G., &#38; Hannappel, T. (2025). Exploring Electronic States and Ultrafast
    Electron Dynamics in AlInP Window Layers: The Role of Surface Reconstruction.
    <i>Advanced Functional Materials</i>. <a href="https://doi.org/10.1002/adfm.202423702">https://doi.org/10.1002/adfm.202423702</a>'
  bibtex: '@article{Zare Pour_Shekarabi_Ruiz Alvarado_Diederich_Gao_Paszuk_Moritz_Jaegermann_Friedrich_van
    de Krol_et al._2025, title={Exploring Electronic States and Ultrafast Electron
    Dynamics in AlInP Window Layers: The Role of Surface Reconstruction}, DOI={<a
    href="https://doi.org/10.1002/adfm.202423702">10.1002/adfm.202423702</a>}, journal={Advanced
    Functional Materials}, publisher={Wiley}, author={Zare Pour, Mohammad Amin and
    Shekarabi, Sahar and Ruiz Alvarado, Isaac Azahel and Diederich, Jonathan and Gao,
    Yuyings and Paszuk, Agnieszka and Moritz, Dominik C. and Jaegermann, Wolfram and
    Friedrich, Dennis and van de Krol, Roel and et al.}, year={2025} }'
  chicago: 'Zare Pour, Mohammad Amin, Sahar Shekarabi, Isaac Azahel Ruiz Alvarado,
    Jonathan Diederich, Yuyings Gao, Agnieszka Paszuk, Dominik C. Moritz, et al. “Exploring
    Electronic States and Ultrafast Electron Dynamics in AlInP Window Layers: The
    Role of Surface Reconstruction.” <i>Advanced Functional Materials</i>, 2025. <a
    href="https://doi.org/10.1002/adfm.202423702">https://doi.org/10.1002/adfm.202423702</a>.'
  ieee: 'M. A. Zare Pour <i>et al.</i>, “Exploring Electronic States and Ultrafast
    Electron Dynamics in AlInP Window Layers: The Role of Surface Reconstruction,”
    <i>Advanced Functional Materials</i>, 2025, doi: <a href="https://doi.org/10.1002/adfm.202423702">10.1002/adfm.202423702</a>.'
  mla: 'Zare Pour, Mohammad Amin, et al. “Exploring Electronic States and Ultrafast
    Electron Dynamics in AlInP Window Layers: The Role of Surface Reconstruction.”
    <i>Advanced Functional Materials</i>, Wiley, 2025, doi:<a href="https://doi.org/10.1002/adfm.202423702">10.1002/adfm.202423702</a>.'
  short: M.A. Zare Pour, S. Shekarabi, I.A. Ruiz Alvarado, J. Diederich, Y. Gao, A.
    Paszuk, D.C. Moritz, W. Jaegermann, D. Friedrich, R. van de Krol, W.G. Schmidt,
    T. Hannappel, Advanced Functional Materials (2025).
date_created: 2025-07-09T13:33:15Z
date_updated: 2025-07-09T13:54:05Z
department:
- _id: '15'
- _id: '170'
- _id: '230'
- _id: '27'
- _id: '295'
doi: 10.1002/adfm.202423702
language:
- iso: eng
publication: Advanced Functional Materials
publication_identifier:
  issn:
  - 1616-301X
  - 1616-3028
publication_status: published
publisher: Wiley
status: public
title: 'Exploring Electronic States and Ultrafast Electron Dynamics in AlInP Window
  Layers: The Role of Surface Reconstruction'
type: journal_article
user_id: '79462'
year: '2025'
...
---
_id: '60815'
abstract:
- lang: eng
  text: <jats:title>Abstract</jats:title><jats:p>The increasing demand for advanced
    sensing technologies drives the development of chemical sensors using innovative
    materials. In gas sensing, optical sensors are often used to detect gases such
    as CO, NO<jats:italic><jats:sub>x</jats:sub></jats:italic>, and O<jats:sub>2</jats:sub>.
    Oxygen sensors typically incorporate dyes into oxygen‐permeable matrices like
    polymers, silica, or zeolites. Alternatively, semiconductor surface chemistry
    can enable O<jats:sub>2</jats:sub> detection. However, these approaches are often
    limited by slow response and recovery times and low selectivity, restricting their
    practical applications. The metal‐organic framework MOF‐76(Eu) and its yttrium‐modified
    variant, MOF‐76(Eu/Y) are reported to exhibit highly reversible and fast optical
    responses to varying O<jats:sub>2</jats:sub> concentrations. Time‐resolved emission
    measurements are performed over short (seconds) and long (hours) timescales using
    N<jats:sub>2</jats:sub> and synthetic air mixtures. Cross‐sensitivity to humidity
    is analyzed. Multichannel scaling photon‐counting experiments confirm quenching
    at the linker level, as the emission lifetime remains nearly constant. Yttrium
    significantly improves stability and performance at room temperature. Structural
    and optical changes induced by yttrium are investigated. Additionally, MIL‐78(Eu),
    another Eu‐BTC‐based MOF with a different coordination environment, is synthesized.
    Unlike MOF‐76(Eu), MIL‐78(Eu) exhibits distinct optical properties but lacks a
    reversible response to O<jats:sub>2</jats:sub>. These results highlight the potential
    of MOF‐76‐based materials for high‐performance O<jats:sub>2</jats:sub> sensing.</jats:p>
article_number: e11190
article_type: original
author:
- first_name: Zhenyu
  full_name: Zhao, Zhenyu
  last_name: Zhao
- first_name: Christian
  full_name: Weinberger, Christian
  id: '11848'
  last_name: Weinberger
- first_name: Jakob
  full_name: Steube, Jakob
  id: '40342'
  last_name: Steube
  orcid: 0000-0003-3178-4429
- first_name: Matthias
  full_name: Bauer, Matthias
  id: '47241'
  last_name: Bauer
  orcid: 0000-0002-9294-6076
- first_name: Martin
  full_name: Brehm, Martin
  id: '100167'
  last_name: Brehm
- first_name: Michael
  full_name: Tiemann, Michael
  id: '23547'
  last_name: Tiemann
  orcid: 0000-0003-1711-2722
citation:
  ama: Zhao Z, Weinberger C, Steube J, Bauer M, Brehm M, Tiemann M. Fast‐Responding
    O<sub>2</sub> Gas Sensor Based on Luminescent Europium Metal‐Organic Frameworks
    (MOF‐76). <i>Advanced Functional Materials</i>. Published online 2025. doi:<a
    href="https://doi.org/10.1002/adfm.202511190">10.1002/adfm.202511190</a>
  apa: Zhao, Z., Weinberger, C., Steube, J., Bauer, M., Brehm, M., &#38; Tiemann,
    M. (2025). Fast‐Responding O<sub>2</sub> Gas Sensor Based on Luminescent Europium
    Metal‐Organic Frameworks (MOF‐76). <i>Advanced Functional Materials</i>, Article
    e11190. <a href="https://doi.org/10.1002/adfm.202511190">https://doi.org/10.1002/adfm.202511190</a>
  bibtex: '@article{Zhao_Weinberger_Steube_Bauer_Brehm_Tiemann_2025, title={Fast‐Responding
    O<sub>2</sub> Gas Sensor Based on Luminescent Europium Metal‐Organic Frameworks
    (MOF‐76)}, DOI={<a href="https://doi.org/10.1002/adfm.202511190">10.1002/adfm.202511190</a>},
    number={e11190}, journal={Advanced Functional Materials}, publisher={Wiley}, author={Zhao,
    Zhenyu and Weinberger, Christian and Steube, Jakob and Bauer, Matthias and Brehm,
    Martin and Tiemann, Michael}, year={2025} }'
  chicago: Zhao, Zhenyu, Christian Weinberger, Jakob Steube, Matthias Bauer, Martin
    Brehm, and Michael Tiemann. “Fast‐Responding O<sub>2</sub> Gas Sensor Based on
    Luminescent Europium Metal‐Organic Frameworks (MOF‐76).” <i>Advanced Functional
    Materials</i>, 2025. <a href="https://doi.org/10.1002/adfm.202511190">https://doi.org/10.1002/adfm.202511190</a>.
  ieee: 'Z. Zhao, C. Weinberger, J. Steube, M. Bauer, M. Brehm, and M. Tiemann, “Fast‐Responding
    O<sub>2</sub> Gas Sensor Based on Luminescent Europium Metal‐Organic Frameworks
    (MOF‐76),” <i>Advanced Functional Materials</i>, Art. no. e11190, 2025, doi: <a
    href="https://doi.org/10.1002/adfm.202511190">10.1002/adfm.202511190</a>.'
  mla: Zhao, Zhenyu, et al. “Fast‐Responding O<sub>2</sub> Gas Sensor Based on Luminescent
    Europium Metal‐Organic Frameworks (MOF‐76).” <i>Advanced Functional Materials</i>,
    e11190, Wiley, 2025, doi:<a href="https://doi.org/10.1002/adfm.202511190">10.1002/adfm.202511190</a>.
  short: Z. Zhao, C. Weinberger, J. Steube, M. Bauer, M. Brehm, M. Tiemann, Advanced
    Functional Materials (2025).
date_created: 2025-07-29T06:59:19Z
date_updated: 2025-07-29T07:02:22Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1002/adfm.202511190
language:
- iso: eng
main_file_link:
- open_access: '1'
oa: '1'
publication: Advanced Functional Materials
publication_identifier:
  issn:
  - 1616-301X
  - 1616-3028
publication_status: published
publisher: Wiley
quality_controlled: '1'
status: public
title: Fast‐Responding O<sub>2</sub> Gas Sensor Based on Luminescent Europium Metal‐Organic
  Frameworks (MOF‐76)
type: journal_article
user_id: '23547'
year: '2025'
...
---
_id: '62816'
abstract:
- lang: eng
  text: The increasing demand for advanced sensing technologies drives the development
    of chemical sensors using innovative materials. In gas sensing, optical sensors
    are often used to detect gases such as CO, NOx, and O2. Oxygen sensors typically
    incorporate dyes into oxygen-permeable matrices like polymers, silica, or zeolites.
    Alternatively, semiconductor surface chemistry can enable O2 detection. However,
    these approaches are often limited by slow response and recovery times and low
    selectivity, restricting their practical applications. The metal-organic framework
    MOF-76(Eu) and its yttrium-modified variant, MOF-76(Eu/Y) are reported to exhibit
    highly reversible and fast optical responses to varying O2 concentrations. Time-resolved
    emission measurements are performed over short (seconds) and long (hours) timescales
    using N2 and synthetic air mixtures. Cross-sensitivity to humidity is analyzed.
    Multichannel scaling photon-counting experiments confirm quenching at the linker
    level, as the emission lifetime remains nearly constant. Yttrium significantly
    improves stability and performance at room temperature. Structural and optical
    changes induced by yttrium are investigated. Additionally, MIL-78(Eu), another
    Eu-BTC-based MOF with a different coordination environment, is synthesized. Unlike
    MOF-76(Eu), MIL-78(Eu) exhibits distinct optical properties but lacks a reversible
    response to O2. These results highlight the potential of MOF-76-based materials
    for high-performance O2 sensing.
article_number: e11190
author:
- first_name: Zhenyu
  full_name: Zhao, Zhenyu
  last_name: Zhao
- first_name: Christian
  full_name: Weinberger, Christian
  id: '11848'
  last_name: Weinberger
- first_name: Jakob
  full_name: Steube, Jakob
  id: '40342'
  last_name: Steube
  orcid: 0000-0003-3178-4429
- first_name: Matthias
  full_name: Bauer, Matthias
  id: '47241'
  last_name: Bauer
  orcid: 0000-0002-9294-6076
- first_name: Martin
  full_name: Brehm, Martin
  id: '100167'
  last_name: Brehm
- first_name: Michael
  full_name: Tiemann, Michael
  id: '23547'
  last_name: Tiemann
  orcid: 0000-0003-1711-2722
citation:
  ama: Zhao Z, Weinberger C, Steube J, Bauer M, Brehm M, Tiemann M. Fast‐Responding
    O2 Gas Sensor Based on Luminescent Europium Metal‐Organic Frameworks (MOF‐76).
    <i>Advanced Functional Materials</i>. Published online 2025. doi:<a href="https://doi.org/10.1002/adfm.202511190">10.1002/adfm.202511190</a>
  apa: Zhao, Z., Weinberger, C., Steube, J., Bauer, M., Brehm, M., &#38; Tiemann,
    M. (2025). Fast‐Responding O2 Gas Sensor Based on Luminescent Europium Metal‐Organic
    Frameworks (MOF‐76). <i>Advanced Functional Materials</i>, Article e11190. <a
    href="https://doi.org/10.1002/adfm.202511190">https://doi.org/10.1002/adfm.202511190</a>
  bibtex: '@article{Zhao_Weinberger_Steube_Bauer_Brehm_Tiemann_2025, title={Fast‐Responding
    O2 Gas Sensor Based on Luminescent Europium Metal‐Organic Frameworks (MOF‐76)},
    DOI={<a href="https://doi.org/10.1002/adfm.202511190">10.1002/adfm.202511190</a>},
    number={e11190}, journal={Advanced Functional Materials}, publisher={Wiley}, author={Zhao,
    Zhenyu and Weinberger, Christian and Steube, Jakob and Bauer, Matthias and Brehm,
    Martin and Tiemann, Michael}, year={2025} }'
  chicago: Zhao, Zhenyu, Christian Weinberger, Jakob Steube, Matthias Bauer, Martin
    Brehm, and Michael Tiemann. “Fast‐Responding O2 Gas Sensor Based on Luminescent
    Europium Metal‐Organic Frameworks (MOF‐76).” <i>Advanced Functional Materials</i>,
    2025. <a href="https://doi.org/10.1002/adfm.202511190">https://doi.org/10.1002/adfm.202511190</a>.
  ieee: 'Z. Zhao, C. Weinberger, J. Steube, M. Bauer, M. Brehm, and M. Tiemann, “Fast‐Responding
    O2 Gas Sensor Based on Luminescent Europium Metal‐Organic Frameworks (MOF‐76),”
    <i>Advanced Functional Materials</i>, Art. no. e11190, 2025, doi: <a href="https://doi.org/10.1002/adfm.202511190">10.1002/adfm.202511190</a>.'
  mla: Zhao, Zhenyu, et al. “Fast‐Responding O2 Gas Sensor Based on Luminescent Europium
    Metal‐Organic Frameworks (MOF‐76).” <i>Advanced Functional Materials</i>, e11190,
    Wiley, 2025, doi:<a href="https://doi.org/10.1002/adfm.202511190">10.1002/adfm.202511190</a>.
  short: Z. Zhao, C. Weinberger, J. Steube, M. Bauer, M. Brehm, M. Tiemann, Advanced
    Functional Materials (2025).
date_created: 2025-12-03T17:09:28Z
date_updated: 2025-12-03T17:11:15Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1002/adfm.202511190
language:
- iso: eng
main_file_link:
- open_access: '1'
oa: '1'
publication: Advanced Functional Materials
publication_identifier:
  issn:
  - 1616-301X
  - 1616-3028
publication_status: published
publisher: Wiley
quality_controlled: '1'
status: public
title: Fast‐Responding O2 Gas Sensor Based on Luminescent Europium Metal‐Organic Frameworks
  (MOF‐76)
type: journal_article
user_id: '23547'
year: '2025'
...
---
_id: '62926'
abstract:
- lang: eng
  text: "<jats:title>Abstract</jats:title>\r\n                  <jats:p>\r\n                    Negatively
    charged boron vacancies () in hexagonal boron nitride (hBN) are emerging as promising
    solid‐state spin qubits due to their optical accessibility, structural simplicity,
    and compatibility with photonic platforms. However, quantifying the density of
    such defects in thin hBN flakes has remained elusive, limiting progress in device
    integration and reproducibility. Here, an all‐optical method is presented to quantify
    \ defect density in hBN by correlating Raman and photoluminescence (PL) signatures
    with irradiation fluence. Two defect‐induced Raman modes, D1 and D2, are identified
    and assigned them to vibrational modes of  using polarization‐resolved Raman measurements
    and density functional theory (DFT) calculations. By adapting a numerical model
    originally developed for graphene, an empirical relationship linking Raman (D1,\r\n
    \                   <jats:italic>E</jats:italic>\r\n                    <jats:sub>2g</jats:sub>\r\n
    \                   ) and PL intensities is established to absolute defect densities.
    This method is universally applicable across various irradiation types and uniquely
    suited for thin flakes, where conventional techniques fail. The approach enables
    accurate, direct, and non‐destructive quantification of spin defect densities
    down to 10\r\n                    <jats:sup>15</jats:sup>\r\n                     defects/cm\r\n
    \                   <jats:sup>3</jats:sup>\r\n                    , offering a
    powerful tool for optimizing and benchmarking hBN for quantum optical applications.\r\n
    \                 </jats:p>"
article_number: e17851
author:
- first_name: Atanu
  full_name: Patra, Atanu
  last_name: Patra
- first_name: Paul
  full_name: Konrad, Paul
  last_name: Konrad
- first_name: Andreas
  full_name: Sperlich, Andreas
  last_name: Sperlich
- first_name: Timur
  full_name: Biktagirov, Timur
  id: '65612'
  last_name: Biktagirov
- first_name: Wolf Gero
  full_name: Schmidt, Wolf Gero
  id: '468'
  last_name: Schmidt
  orcid: 0000-0002-2717-5076
- first_name: Lesley
  full_name: Spencer, Lesley
  last_name: Spencer
- first_name: Igor
  full_name: Aharonovich, Igor
  last_name: Aharonovich
- first_name: Sven
  full_name: Höfling, Sven
  last_name: Höfling
- first_name: Vladimir
  full_name: Dyakonov, Vladimir
  last_name: Dyakonov
citation:
  ama: Patra A, Konrad P, Sperlich A, et al. Quantifying Spin Defect Density in hBN
    via Raman and Photoluminescence Analysis. <i>Advanced Functional Materials</i>.
    Published online 2025. doi:<a href="https://doi.org/10.1002/adfm.202517851">10.1002/adfm.202517851</a>
  apa: Patra, A., Konrad, P., Sperlich, A., Biktagirov, T., Schmidt, W. G., Spencer,
    L., Aharonovich, I., Höfling, S., &#38; Dyakonov, V. (2025). Quantifying Spin
    Defect Density in hBN via Raman and Photoluminescence Analysis. <i>Advanced Functional
    Materials</i>, Article e17851. <a href="https://doi.org/10.1002/adfm.202517851">https://doi.org/10.1002/adfm.202517851</a>
  bibtex: '@article{Patra_Konrad_Sperlich_Biktagirov_Schmidt_Spencer_Aharonovich_Höfling_Dyakonov_2025,
    title={Quantifying Spin Defect Density in hBN via Raman and Photoluminescence
    Analysis}, DOI={<a href="https://doi.org/10.1002/adfm.202517851">10.1002/adfm.202517851</a>},
    number={e17851}, journal={Advanced Functional Materials}, publisher={Wiley}, author={Patra,
    Atanu and Konrad, Paul and Sperlich, Andreas and Biktagirov, Timur and Schmidt,
    Wolf Gero and Spencer, Lesley and Aharonovich, Igor and Höfling, Sven and Dyakonov,
    Vladimir}, year={2025} }'
  chicago: Patra, Atanu, Paul Konrad, Andreas Sperlich, Timur Biktagirov, Wolf Gero
    Schmidt, Lesley Spencer, Igor Aharonovich, Sven Höfling, and Vladimir Dyakonov.
    “Quantifying Spin Defect Density in HBN via Raman and Photoluminescence Analysis.”
    <i>Advanced Functional Materials</i>, 2025. <a href="https://doi.org/10.1002/adfm.202517851">https://doi.org/10.1002/adfm.202517851</a>.
  ieee: 'A. Patra <i>et al.</i>, “Quantifying Spin Defect Density in hBN via Raman
    and Photoluminescence Analysis,” <i>Advanced Functional Materials</i>, Art. no.
    e17851, 2025, doi: <a href="https://doi.org/10.1002/adfm.202517851">10.1002/adfm.202517851</a>.'
  mla: Patra, Atanu, et al. “Quantifying Spin Defect Density in HBN via Raman and
    Photoluminescence Analysis.” <i>Advanced Functional Materials</i>, e17851, Wiley,
    2025, doi:<a href="https://doi.org/10.1002/adfm.202517851">10.1002/adfm.202517851</a>.
  short: A. Patra, P. Konrad, A. Sperlich, T. Biktagirov, W.G. Schmidt, L. Spencer,
    I. Aharonovich, S. Höfling, V. Dyakonov, Advanced Functional Materials (2025).
date_created: 2025-12-05T14:15:35Z
date_updated: 2025-12-05T14:18:27Z
department:
- _id: '15'
- _id: '170'
- _id: '295'
- _id: '35'
- _id: '230'
- _id: '27'
doi: 10.1002/adfm.202517851
language:
- iso: eng
project:
- _id: '52'
  name: Computing Resources Provided by the Paderborn Center for Parallel Computing
publication: Advanced Functional Materials
publication_identifier:
  issn:
  - 1616-301X
  - 1616-3028
publication_status: published
publisher: Wiley
status: public
title: Quantifying Spin Defect Density in hBN via Raman and Photoluminescence Analysis
type: journal_article
user_id: '16199'
year: '2025'
...
---
_id: '61359'
abstract:
- lang: eng
  text: <jats:title>Abstract</jats:title><jats:p>The current efficiency records for
    generating green hydrogen via solar water splitting are held by indium phosphide
    (InP)‐based photo‐absorbers, protected by TiO<jats:sub>2</jats:sub> layers grown
    through atomic layer deposition (ALD). InP is also a leading material for photonic
    integrated circuits and computing, where ultrafast near‐surface behavior is key.
    A previous study described electronic pathways at the phosphorus‐rich (P‐rich)
    surface of p‐doped InP(100) using time‐resolved two‐photon photoemission (tr‐2PPE)
    spectroscopy. Here, the intricate electron pathways of the P‐rich InP surface
    modified with ALD‐deposited TiO<jats:sub>2</jats:sub> are explored. Photoexcited
    bulk InP electrons migrate through a bulk‐to‐surface transition cluster of states
    and surface states and inject into the TiO<jats:sub>2</jats:sub> conduction band
    (CB). Energy levels and occupation dynamics of CB states in P‐rich InP and TiO<jats:sub>2</jats:sub>
    adlayers are observed, with discrete states preserved up to 10 nm TiO<jats:sub>2</jats:sub>
    deposition. Thermalization lifetimes of excited electrons &gt; 0.8 eV above the
    InP conduction band minimum (CBM) are preserved for layer thicknesses up to 2.5 nm.
    Annealing at 300 °C to achieve crystalline TiO<jats:sub>2</jats:sub> reconstructions
    destroys interfacial states, affecting charge transfer. These observations enable
    innovative engineering of the P‐rich InP/TiO<jats:sub>2</jats:sub> heterointerface,
    opening new possibilities for studying hot‐carrier extraction, adsorbate effects,
    surface plasmons, and improving photovoltaic and PEC water‐splitting devices.</jats:p>
article_number: '2409455'
author:
- first_name: Jonathan
  full_name: Diederich, Jonathan
  last_name: Diederich
- first_name: Jennifer Velazquez
  full_name: Rojas, Jennifer Velazquez
  last_name: Rojas
- first_name: Agnieszka
  full_name: Paszuk, Agnieszka
  last_name: Paszuk
- first_name: Mohammad Amin Zare
  full_name: Pour, Mohammad Amin Zare
  last_name: Pour
- first_name: Christian
  full_name: Höhn, Christian
  last_name: Höhn
- first_name: Isaac Azahel Ruiz
  full_name: Alvarado, Isaac Azahel Ruiz
  last_name: Alvarado
- first_name: Klaus
  full_name: Schwarzburg, Klaus
  last_name: Schwarzburg
- first_name: David
  full_name: Ostheimer, David
  last_name: Ostheimer
- first_name: Rainer
  full_name: Eichberger, Rainer
  last_name: Eichberger
- first_name: Wolf Gero
  full_name: Schmidt, Wolf Gero
  id: '468'
  last_name: Schmidt
  orcid: 0000-0002-2717-5076
- first_name: Thomas
  full_name: Hannappel, Thomas
  last_name: Hannappel
- first_name: Roel
  full_name: van de Krol, Roel
  last_name: van de Krol
- first_name: Dennis
  full_name: Friedrich, Dennis
  last_name: Friedrich
citation:
  ama: Diederich J, Rojas JV, Paszuk A, et al. Ultrafast Electron Dynamics at the
    P‐rich Indium Phosphide/TiO<sub>2</sub> Interface. <i>Advanced Functional Materials</i>.
    2024;34(49). doi:<a href="https://doi.org/10.1002/adfm.202409455">10.1002/adfm.202409455</a>
  apa: Diederich, J., Rojas, J. V., Paszuk, A., Pour, M. A. Z., Höhn, C., Alvarado,
    I. A. R., Schwarzburg, K., Ostheimer, D., Eichberger, R., Schmidt, W. G., Hannappel,
    T., van de Krol, R., &#38; Friedrich, D. (2024). Ultrafast Electron Dynamics at
    the P‐rich Indium Phosphide/TiO<sub>2</sub> Interface. <i>Advanced Functional
    Materials</i>, <i>34</i>(49), Article 2409455. <a href="https://doi.org/10.1002/adfm.202409455">https://doi.org/10.1002/adfm.202409455</a>
  bibtex: '@article{Diederich_Rojas_Paszuk_Pour_Höhn_Alvarado_Schwarzburg_Ostheimer_Eichberger_Schmidt_et
    al._2024, title={Ultrafast Electron Dynamics at the P‐rich Indium Phosphide/TiO<sub>2</sub>
    Interface}, volume={34}, DOI={<a href="https://doi.org/10.1002/adfm.202409455">10.1002/adfm.202409455</a>},
    number={492409455}, journal={Advanced Functional Materials}, publisher={Wiley},
    author={Diederich, Jonathan and Rojas, Jennifer Velazquez and Paszuk, Agnieszka
    and Pour, Mohammad Amin Zare and Höhn, Christian and Alvarado, Isaac Azahel Ruiz
    and Schwarzburg, Klaus and Ostheimer, David and Eichberger, Rainer and Schmidt,
    Wolf Gero and et al.}, year={2024} }'
  chicago: Diederich, Jonathan, Jennifer Velazquez Rojas, Agnieszka Paszuk, Mohammad
    Amin Zare Pour, Christian Höhn, Isaac Azahel Ruiz Alvarado, Klaus Schwarzburg,
    et al. “Ultrafast Electron Dynamics at the P‐rich Indium Phosphide/TiO<sub>2</sub>
    Interface.” <i>Advanced Functional Materials</i> 34, no. 49 (2024). <a href="https://doi.org/10.1002/adfm.202409455">https://doi.org/10.1002/adfm.202409455</a>.
  ieee: 'J. Diederich <i>et al.</i>, “Ultrafast Electron Dynamics at the P‐rich Indium
    Phosphide/TiO<sub>2</sub> Interface,” <i>Advanced Functional Materials</i>, vol.
    34, no. 49, Art. no. 2409455, 2024, doi: <a href="https://doi.org/10.1002/adfm.202409455">10.1002/adfm.202409455</a>.'
  mla: Diederich, Jonathan, et al. “Ultrafast Electron Dynamics at the P‐rich Indium
    Phosphide/TiO<sub>2</sub> Interface.” <i>Advanced Functional Materials</i>, vol.
    34, no. 49, 2409455, Wiley, 2024, doi:<a href="https://doi.org/10.1002/adfm.202409455">10.1002/adfm.202409455</a>.
  short: J. Diederich, J.V. Rojas, A. Paszuk, M.A.Z. Pour, C. Höhn, I.A.R. Alvarado,
    K. Schwarzburg, D. Ostheimer, R. Eichberger, W.G. Schmidt, T. Hannappel, R. van
    de Krol, D. Friedrich, Advanced Functional Materials 34 (2024).
date_created: 2025-09-18T11:37:51Z
date_updated: 2025-12-05T13:35:09Z
department:
- _id: '15'
- _id: '170'
- _id: '295'
- _id: '35'
- _id: '230'
doi: 10.1002/adfm.202409455
intvolume: '        34'
issue: '49'
language:
- iso: eng
publication: Advanced Functional Materials
publication_identifier:
  issn:
  - 1616-301X
  - 1616-3028
publication_status: published
publisher: Wiley
status: public
title: Ultrafast Electron Dynamics at the P‐rich Indium Phosphide/TiO<sub>2</sub>
  Interface
type: journal_article
user_id: '16199'
volume: 34
year: '2024'
...
---
_id: '60582'
abstract:
- lang: eng
  text: <jats:title>Abstract</jats:title><jats:p>The current efficiency records for
    generating green hydrogen via solar water splitting are held by indium phosphide
    (InP)‐based photo‐absorbers, protected by TiO<jats:sub>2</jats:sub> layers grown
    through atomic layer deposition (ALD). InP is also a leading material for photonic
    integrated circuits and computing, where ultrafast near‐surface behavior is key.
    A previous study described electronic pathways at the phosphorus‐rich (P‐rich)
    surface of p‐doped InP(100) using time‐resolved two‐photon photoemission (tr‐2PPE)
    spectroscopy. Here, the intricate electron pathways of the P‐rich InP surface
    modified with ALD‐deposited TiO<jats:sub>2</jats:sub> are explored. Photoexcited
    bulk InP electrons migrate through a bulk‐to‐surface transition cluster of states
    and surface states and inject into the TiO<jats:sub>2</jats:sub> conduction band
    (CB). Energy levels and occupation dynamics of CB states in P‐rich InP and TiO<jats:sub>2</jats:sub>
    adlayers are observed, with discrete states preserved up to 10 nm TiO<jats:sub>2</jats:sub>
    deposition. Thermalization lifetimes of excited electrons &gt; 0.8 eV above the
    InP conduction band minimum (CBM) are preserved for layer thicknesses up to 2.5 nm.
    Annealing at 300 °C to achieve crystalline TiO<jats:sub>2</jats:sub> reconstructions
    destroys interfacial states, affecting charge transfer. These observations enable
    innovative engineering of the P‐rich InP/TiO<jats:sub>2</jats:sub> heterointerface,
    opening new possibilities for studying hot‐carrier extraction, adsorbate effects,
    surface plasmons, and improving photovoltaic and PEC water‐splitting devices.</jats:p>
article_type: original
author:
- first_name: Jonathan
  full_name: Diederich, Jonathan
  last_name: Diederich
- first_name: Jennifer Velazquez
  full_name: Rojas, Jennifer Velazquez
  last_name: Rojas
- first_name: Agnieszka
  full_name: Paszuk, Agnieszka
  last_name: Paszuk
- first_name: Mohammad Amin Zare
  full_name: Pour, Mohammad Amin Zare
  last_name: Pour
- first_name: Christian
  full_name: Höhn, Christian
  last_name: Höhn
- first_name: Isaac Azahel
  full_name: Ruiz Alvarado, Isaac Azahel
  id: '79462'
  last_name: Ruiz Alvarado
  orcid: 0000-0002-4710-1170
- first_name: Klaus
  full_name: Schwarzburg, Klaus
  last_name: Schwarzburg
- first_name: David
  full_name: Ostheimer, David
  last_name: Ostheimer
- first_name: Rainer
  full_name: Eichberger, Rainer
  last_name: Eichberger
- first_name: Wolf Gero
  full_name: Schmidt, Wolf Gero
  id: '468'
  last_name: Schmidt
  orcid: 0000-0002-2717-5076
- first_name: Thomas
  full_name: Hannappel, Thomas
  last_name: Hannappel
- first_name: Roel
  full_name: van de Krol, Roel
  last_name: van de Krol
- first_name: Dennis
  full_name: Friedrich, Dennis
  last_name: Friedrich
citation:
  ama: Diederich J, Rojas JV, Paszuk A, et al. Ultrafast Electron Dynamics at the
    P‐rich Indium Phosphide/TiO<sub>2</sub> Interface. <i>Advanced Functional Materials</i>.
    2024;34(49). doi:<a href="https://doi.org/10.1002/adfm.202409455">10.1002/adfm.202409455</a>
  apa: Diederich, J., Rojas, J. V., Paszuk, A., Pour, M. A. Z., Höhn, C., Ruiz Alvarado,
    I. A., Schwarzburg, K., Ostheimer, D., Eichberger, R., Schmidt, W. G., Hannappel,
    T., van de Krol, R., &#38; Friedrich, D. (2024). Ultrafast Electron Dynamics at
    the P‐rich Indium Phosphide/TiO<sub>2</sub> Interface. <i>Advanced Functional
    Materials</i>, <i>34</i>(49). <a href="https://doi.org/10.1002/adfm.202409455">https://doi.org/10.1002/adfm.202409455</a>
  bibtex: '@article{Diederich_Rojas_Paszuk_Pour_Höhn_Ruiz Alvarado_Schwarzburg_Ostheimer_Eichberger_Schmidt_et
    al._2024, title={Ultrafast Electron Dynamics at the P‐rich Indium Phosphide/TiO<sub>2</sub>
    Interface}, volume={34}, DOI={<a href="https://doi.org/10.1002/adfm.202409455">10.1002/adfm.202409455</a>},
    number={49}, journal={Advanced Functional Materials}, publisher={Wiley}, author={Diederich,
    Jonathan and Rojas, Jennifer Velazquez and Paszuk, Agnieszka and Pour, Mohammad
    Amin Zare and Höhn, Christian and Ruiz Alvarado, Isaac Azahel and Schwarzburg,
    Klaus and Ostheimer, David and Eichberger, Rainer and Schmidt, Wolf Gero and et
    al.}, year={2024} }'
  chicago: Diederich, Jonathan, Jennifer Velazquez Rojas, Agnieszka Paszuk, Mohammad
    Amin Zare Pour, Christian Höhn, Isaac Azahel Ruiz Alvarado, Klaus Schwarzburg,
    et al. “Ultrafast Electron Dynamics at the P‐rich Indium Phosphide/TiO<sub>2</sub>
    Interface.” <i>Advanced Functional Materials</i> 34, no. 49 (2024). <a href="https://doi.org/10.1002/adfm.202409455">https://doi.org/10.1002/adfm.202409455</a>.
  ieee: 'J. Diederich <i>et al.</i>, “Ultrafast Electron Dynamics at the P‐rich Indium
    Phosphide/TiO<sub>2</sub> Interface,” <i>Advanced Functional Materials</i>, vol.
    34, no. 49, 2024, doi: <a href="https://doi.org/10.1002/adfm.202409455">10.1002/adfm.202409455</a>.'
  mla: Diederich, Jonathan, et al. “Ultrafast Electron Dynamics at the P‐rich Indium
    Phosphide/TiO<sub>2</sub> Interface.” <i>Advanced Functional Materials</i>, vol.
    34, no. 49, Wiley, 2024, doi:<a href="https://doi.org/10.1002/adfm.202409455">10.1002/adfm.202409455</a>.
  short: J. Diederich, J.V. Rojas, A. Paszuk, M.A.Z. Pour, C. Höhn, I.A. Ruiz Alvarado,
    K. Schwarzburg, D. Ostheimer, R. Eichberger, W.G. Schmidt, T. Hannappel, R. van
    de Krol, D. Friedrich, Advanced Functional Materials 34 (2024).
date_created: 2025-07-09T13:47:37Z
date_updated: 2025-12-05T13:39:54Z
department:
- _id: '15'
- _id: '170'
- _id: '295'
- _id: '230'
- _id: '27'
- _id: '35'
doi: 10.1002/adfm.202409455
intvolume: '        34'
issue: '49'
language:
- iso: eng
publication: Advanced Functional Materials
publication_identifier:
  issn:
  - 1616-301X
  - 1616-3028
publication_status: published
publisher: Wiley
status: public
title: Ultrafast Electron Dynamics at the P‐rich Indium Phosphide/TiO<sub>2</sub>
  Interface
type: journal_article
user_id: '16199'
volume: 34
year: '2024'
...
---
_id: '33682'
article_number: '2110930'
author:
- first_name: Mohammad
  full_name: Khazaei, Mohammad
  last_name: Khazaei
- first_name: Ahmad
  full_name: Ranjbar, Ahmad
  last_name: Ranjbar
- first_name: Yoon‐Gu
  full_name: Kang, Yoon‐Gu
  last_name: Kang
- first_name: Yunye
  full_name: Liang, Yunye
  last_name: Liang
- first_name: Rasoul
  full_name: Khaledialidusti, Rasoul
  last_name: Khaledialidusti
- first_name: Soungmin
  full_name: Bae, Soungmin
  last_name: Bae
- first_name: Hannes
  full_name: Raebiger, Hannes
  last_name: Raebiger
- first_name: Vei
  full_name: Wang, Vei
  last_name: Wang
- first_name: Myung Joon
  full_name: Han, Myung Joon
  last_name: Han
- first_name: Hiroshi
  full_name: Mizoguchi, Hiroshi
  last_name: Mizoguchi
- first_name: Mohammad S.
  full_name: Bahramy, Mohammad S.
  last_name: Bahramy
- first_name: Thomas
  full_name: Kühne, Thomas
  id: '49079'
  last_name: Kühne
- first_name: Rodion V.
  full_name: Belosludov, Rodion V.
  last_name: Belosludov
- first_name: Kaoru
  full_name: Ohno, Kaoru
  last_name: Ohno
- first_name: Hideo
  full_name: Hosono, Hideo
  last_name: Hosono
citation:
  ama: 'Khazaei M, Ranjbar A, Kang Y, et al. Electronic Structures of Group III–V
    Element Haeckelite Compounds: A Novel Family of Semiconductors, Dirac Semimetals,
    and Topological Insulators. <i>Advanced Functional Materials</i>. 2022;32(20).
    doi:<a href="https://doi.org/10.1002/adfm.202110930">10.1002/adfm.202110930</a>'
  apa: 'Khazaei, M., Ranjbar, A., Kang, Y., Liang, Y., Khaledialidusti, R., Bae, S.,
    Raebiger, H., Wang, V., Han, M. J., Mizoguchi, H., Bahramy, M. S., Kühne, T.,
    Belosludov, R. V., Ohno, K., &#38; Hosono, H. (2022). Electronic Structures of
    Group III–V Element Haeckelite Compounds: A Novel Family of Semiconductors, Dirac
    Semimetals, and Topological Insulators. <i>Advanced Functional Materials</i>,
    <i>32</i>(20), Article 2110930. <a href="https://doi.org/10.1002/adfm.202110930">https://doi.org/10.1002/adfm.202110930</a>'
  bibtex: '@article{Khazaei_Ranjbar_Kang_Liang_Khaledialidusti_Bae_Raebiger_Wang_Han_Mizoguchi_et
    al._2022, title={Electronic Structures of Group III–V Element Haeckelite Compounds:
    A Novel Family of Semiconductors, Dirac Semimetals, and Topological Insulators},
    volume={32}, DOI={<a href="https://doi.org/10.1002/adfm.202110930">10.1002/adfm.202110930</a>},
    number={202110930}, journal={Advanced Functional Materials}, publisher={Wiley},
    author={Khazaei, Mohammad and Ranjbar, Ahmad and Kang, Yoon‐Gu and Liang, Yunye
    and Khaledialidusti, Rasoul and Bae, Soungmin and Raebiger, Hannes and Wang, Vei
    and Han, Myung Joon and Mizoguchi, Hiroshi and et al.}, year={2022} }'
  chicago: 'Khazaei, Mohammad, Ahmad Ranjbar, Yoon‐Gu Kang, Yunye Liang, Rasoul Khaledialidusti,
    Soungmin Bae, Hannes Raebiger, et al. “Electronic Structures of Group III–V Element
    Haeckelite Compounds: A Novel Family of Semiconductors, Dirac Semimetals, and
    Topological Insulators.” <i>Advanced Functional Materials</i> 32, no. 20 (2022).
    <a href="https://doi.org/10.1002/adfm.202110930">https://doi.org/10.1002/adfm.202110930</a>.'
  ieee: 'M. Khazaei <i>et al.</i>, “Electronic Structures of Group III–V Element Haeckelite
    Compounds: A Novel Family of Semiconductors, Dirac Semimetals, and Topological
    Insulators,” <i>Advanced Functional Materials</i>, vol. 32, no. 20, Art. no. 2110930,
    2022, doi: <a href="https://doi.org/10.1002/adfm.202110930">10.1002/adfm.202110930</a>.'
  mla: 'Khazaei, Mohammad, et al. “Electronic Structures of Group III–V Element Haeckelite
    Compounds: A Novel Family of Semiconductors, Dirac Semimetals, and Topological
    Insulators.” <i>Advanced Functional Materials</i>, vol. 32, no. 20, 2110930, Wiley,
    2022, doi:<a href="https://doi.org/10.1002/adfm.202110930">10.1002/adfm.202110930</a>.'
  short: M. Khazaei, A. Ranjbar, Y. Kang, Y. Liang, R. Khaledialidusti, S. Bae, H.
    Raebiger, V. Wang, M.J. Han, H. Mizoguchi, M.S. Bahramy, T. Kühne, R.V. Belosludov,
    K. Ohno, H. Hosono, Advanced Functional Materials 32 (2022).
date_created: 2022-10-11T08:15:11Z
date_updated: 2022-10-11T08:15:28Z
department:
- _id: '613'
doi: 10.1002/adfm.202110930
intvolume: '        32'
issue: '20'
keyword:
- Electrochemistry
- Condensed Matter Physics
- Biomaterials
- Electronic
- Optical and Magnetic Materials
language:
- iso: eng
publication: Advanced Functional Materials
publication_identifier:
  issn:
  - 1616-301X
  - 1616-3028
publication_status: published
publisher: Wiley
status: public
title: 'Electronic Structures of Group III–V Element Haeckelite Compounds: A Novel
  Family of Semiconductors, Dirac Semimetals, and Topological Insulators'
type: journal_article
user_id: '71051'
volume: 32
year: '2022'
...
---
_id: '23601'
author:
- first_name: Maged
  full_name: Abdelsamie, Maged
  last_name: Abdelsamie
- first_name: Junwei
  full_name: Xu, Junwei
  last_name: Xu
- first_name: Karsten
  full_name: Bruening, Karsten
  last_name: Bruening
- first_name: Christopher J.
  full_name: Tassone, Christopher J.
  last_name: Tassone
- first_name: Hans-Georg
  full_name: Steinrück, Hans-Georg
  id: '84268'
  last_name: Steinrück
  orcid: 0000-0001-6373-0877
- first_name: Michael F.
  full_name: Toney, Michael F.
  last_name: Toney
citation:
  ama: Abdelsamie M, Xu J, Bruening K, Tassone CJ, Steinrück H-G, Toney MF. Impact
    of Processing on Structural and Compositional Evolution in Mixed Metal Halide
    Perovskites during Film Formation. <i>Advanced Functional Materials</i>. 2020;30:2001752.
    doi:<a href="https://doi.org/10.1002/adfm.202001752">10.1002/adfm.202001752</a>
  apa: Abdelsamie, M., Xu, J., Bruening, K., Tassone, C. J., Steinrück, H.-G., &#38;
    Toney, M. F. (2020). Impact of Processing on Structural and Compositional Evolution
    in Mixed Metal Halide Perovskites during Film Formation. <i>Advanced Functional
    Materials</i>, <i>30</i>, 2001752. <a href="https://doi.org/10.1002/adfm.202001752">https://doi.org/10.1002/adfm.202001752</a>
  bibtex: '@article{Abdelsamie_Xu_Bruening_Tassone_Steinrück_Toney_2020, title={Impact
    of Processing on Structural and Compositional Evolution in Mixed Metal Halide
    Perovskites during Film Formation}, volume={30}, DOI={<a href="https://doi.org/10.1002/adfm.202001752">10.1002/adfm.202001752</a>},
    journal={Advanced Functional Materials}, author={Abdelsamie, Maged and Xu, Junwei
    and Bruening, Karsten and Tassone, Christopher J. and Steinrück, Hans-Georg and
    Toney, Michael F.}, year={2020}, pages={2001752} }'
  chicago: 'Abdelsamie, Maged, Junwei Xu, Karsten Bruening, Christopher J. Tassone,
    Hans-Georg Steinrück, and Michael F. Toney. “Impact of Processing on Structural
    and Compositional Evolution in Mixed Metal Halide Perovskites during Film Formation.”
    <i>Advanced Functional Materials</i> 30 (2020): 2001752. <a href="https://doi.org/10.1002/adfm.202001752">https://doi.org/10.1002/adfm.202001752</a>.'
  ieee: 'M. Abdelsamie, J. Xu, K. Bruening, C. J. Tassone, H.-G. Steinrück, and M.
    F. Toney, “Impact of Processing on Structural and Compositional Evolution in Mixed
    Metal Halide Perovskites during Film Formation,” <i>Advanced Functional Materials</i>,
    vol. 30, p. 2001752, 2020, doi: <a href="https://doi.org/10.1002/adfm.202001752">10.1002/adfm.202001752</a>.'
  mla: Abdelsamie, Maged, et al. “Impact of Processing on Structural and Compositional
    Evolution in Mixed Metal Halide Perovskites during Film Formation.” <i>Advanced
    Functional Materials</i>, vol. 30, 2020, p. 2001752, doi:<a href="https://doi.org/10.1002/adfm.202001752">10.1002/adfm.202001752</a>.
  short: M. Abdelsamie, J. Xu, K. Bruening, C.J. Tassone, H.-G. Steinrück, M.F. Toney,
    Advanced Functional Materials 30 (2020) 2001752.
date_created: 2021-09-01T09:08:01Z
date_updated: 2022-01-06T06:55:57Z
department:
- _id: '633'
doi: 10.1002/adfm.202001752
intvolume: '        30'
language:
- iso: eng
page: '2001752'
publication: Advanced Functional Materials
publication_identifier:
  issn:
  - 1616-301X
  - 1616-3028
publication_status: published
status: public
title: Impact of Processing on Structural and Compositional Evolution in Mixed Metal
  Halide Perovskites during Film Formation
type: journal_article
user_id: '84268'
volume: 30
year: '2020'
...
---
_id: '25905'
abstract:
- lang: eng
  text: A nanocomposite material based on copper(II) oxide (CuO) and its utilization
    as a highly selective and stable gas-responsive electrical switch for hydrogen
    sulphide (H2S) detection is presented. The material can be applied as a sensitive
    layer for H2S monitoring, e.g., in biogas gas plants. CuO nanoparticles are embedded
    in a rigid, nanoporous silica (SiO2) matrix to form an electrical percolating
    network of low conducting CuO and, upon exposure to H2S, highly conducting copper(II)
    sulphide (CuS) particles. By steric hindrance due to the silica pore walls, the
    structure of the network is maintained even though the reversible reaction of
    CuO to CuS is accompanied by significant volume expansion. The conducting state
    of the percolating network can be controlled by a variety of parameters, such
    as temperature, electrode layout, and network topology of the porous silica matrix.
    The latter means that this new type of sensing material has a structure-encoded
    detection limit for H2S, which offers new application opportunities. The fabrication
    process of the mesoporous CuO@SiO2 composite as well as the sensor design and
    characteristics are described in detail. In addition, theoretical modeling of
    the percolation effect by Monte-Carlo simulations yields deeper insight into the
    underlying percolation mechanism and the observed response characteristics.
article_number: '1904505'
article_type: original
author:
- first_name: Andrej
  full_name: Paul, Andrej
  last_name: Paul
- first_name: Bertram
  full_name: Schwind, Bertram
  last_name: Schwind
- first_name: Christian
  full_name: Weinberger, Christian
  id: '11848'
  last_name: Weinberger
- first_name: Michael
  full_name: Tiemann, Michael
  id: '23547'
  last_name: Tiemann
  orcid: 0000-0003-1711-2722
- first_name: Thorsten
  full_name: Wagner, Thorsten
  last_name: Wagner
citation:
  ama: 'Paul A, Schwind B, Weinberger C, Tiemann M, Wagner T. Gas Responsive Nanoswitch:
    Copper Oxide Composite for Highly Selective H2S Detection. <i>Advanced Functional
    Materials</i>. Published online 2019. doi:<a href="https://doi.org/10.1002/adfm.201904505">10.1002/adfm.201904505</a>'
  apa: 'Paul, A., Schwind, B., Weinberger, C., Tiemann, M., &#38; Wagner, T. (2019).
    Gas Responsive Nanoswitch: Copper Oxide Composite for Highly Selective H2S Detection.
    <i>Advanced Functional Materials</i>, Article 1904505. <a href="https://doi.org/10.1002/adfm.201904505">https://doi.org/10.1002/adfm.201904505</a>'
  bibtex: '@article{Paul_Schwind_Weinberger_Tiemann_Wagner_2019, title={Gas Responsive
    Nanoswitch: Copper Oxide Composite for Highly Selective H2S Detection}, DOI={<a
    href="https://doi.org/10.1002/adfm.201904505">10.1002/adfm.201904505</a>}, number={1904505},
    journal={Advanced Functional Materials}, author={Paul, Andrej and Schwind, Bertram
    and Weinberger, Christian and Tiemann, Michael and Wagner, Thorsten}, year={2019}
    }'
  chicago: 'Paul, Andrej, Bertram Schwind, Christian Weinberger, Michael Tiemann,
    and Thorsten Wagner. “Gas Responsive Nanoswitch: Copper Oxide Composite for Highly
    Selective H2S Detection.” <i>Advanced Functional Materials</i>, 2019. <a href="https://doi.org/10.1002/adfm.201904505">https://doi.org/10.1002/adfm.201904505</a>.'
  ieee: 'A. Paul, B. Schwind, C. Weinberger, M. Tiemann, and T. Wagner, “Gas Responsive
    Nanoswitch: Copper Oxide Composite for Highly Selective H2S Detection,” <i>Advanced
    Functional Materials</i>, Art. no. 1904505, 2019, doi: <a href="https://doi.org/10.1002/adfm.201904505">10.1002/adfm.201904505</a>.'
  mla: 'Paul, Andrej, et al. “Gas Responsive Nanoswitch: Copper Oxide Composite for
    Highly Selective H2S Detection.” <i>Advanced Functional Materials</i>, 1904505,
    2019, doi:<a href="https://doi.org/10.1002/adfm.201904505">10.1002/adfm.201904505</a>.'
  short: A. Paul, B. Schwind, C. Weinberger, M. Tiemann, T. Wagner, Advanced Functional
    Materials (2019).
date_created: 2021-10-08T10:42:50Z
date_updated: 2023-03-22T09:11:49Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1002/adfm.201904505
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://onlinelibrary.wiley.com/doi/epdf/10.1002/adfm.201904505
oa: '1'
publication: Advanced Functional Materials
publication_identifier:
  issn:
  - 1616-301X
  - 1616-3028
publication_status: published
quality_controlled: '1'
status: public
title: 'Gas Responsive Nanoswitch: Copper Oxide Composite for Highly Selective H2S
  Detection'
type: journal_article
user_id: '23547'
year: '2019'
...
---
_id: '41272'
author:
- first_name: Vito
  full_name: Di Noto, Vito
  last_name: Di Noto
- first_name: Angelika B.
  full_name: Boeer, Angelika B.
  last_name: Boeer
- first_name: Sandra
  full_name: Lavina, Sandra
  last_name: Lavina
- first_name: Christopher A.
  full_name: Muryn, Christopher A.
  last_name: Muryn
- first_name: Matthias
  full_name: Bauer, Matthias
  id: '47241'
  last_name: Bauer
  orcid: 0000-0002-9294-6076
- first_name: Grigore A.
  full_name: Timco, Grigore A.
  last_name: Timco
- first_name: Enrico
  full_name: Negro, Enrico
  last_name: Negro
- first_name: Marzio
  full_name: Rancan, Marzio
  last_name: Rancan
- first_name: Richard E. P.
  full_name: Winpenny, Richard E. P.
  last_name: Winpenny
- first_name: Silvia
  full_name: Gross, Silvia
  last_name: Gross
citation:
  ama: Di Noto V, Boeer AB, Lavina S, et al. Functional Chromium Wheel-Based Hybrid
    Organic-Inorganic Materials for Dielectric Applications. <i>Advanced Functional
    Materials</i>. 2009;19(20):3226-3236. doi:<a href="https://doi.org/10.1002/adfm.200900600">10.1002/adfm.200900600</a>
  apa: Di Noto, V., Boeer, A. B., Lavina, S., Muryn, C. A., Bauer, M., Timco, G. A.,
    Negro, E., Rancan, M., Winpenny, R. E. P., &#38; Gross, S. (2009). Functional
    Chromium Wheel-Based Hybrid Organic-Inorganic Materials for Dielectric Applications.
    <i>Advanced Functional Materials</i>, <i>19</i>(20), 3226–3236. <a href="https://doi.org/10.1002/adfm.200900600">https://doi.org/10.1002/adfm.200900600</a>
  bibtex: '@article{Di Noto_Boeer_Lavina_Muryn_Bauer_Timco_Negro_Rancan_Winpenny_Gross_2009,
    title={Functional Chromium Wheel-Based Hybrid Organic-Inorganic Materials for
    Dielectric Applications}, volume={19}, DOI={<a href="https://doi.org/10.1002/adfm.200900600">10.1002/adfm.200900600</a>},
    number={20}, journal={Advanced Functional Materials}, publisher={Wiley}, author={Di
    Noto, Vito and Boeer, Angelika B. and Lavina, Sandra and Muryn, Christopher A.
    and Bauer, Matthias and Timco, Grigore A. and Negro, Enrico and Rancan, Marzio
    and Winpenny, Richard E. P. and Gross, Silvia}, year={2009}, pages={3226–3236}
    }'
  chicago: 'Di Noto, Vito, Angelika B. Boeer, Sandra Lavina, Christopher A. Muryn,
    Matthias Bauer, Grigore A. Timco, Enrico Negro, Marzio Rancan, Richard E. P. Winpenny,
    and Silvia Gross. “Functional Chromium Wheel-Based Hybrid Organic-Inorganic Materials
    for Dielectric Applications.” <i>Advanced Functional Materials</i> 19, no. 20
    (2009): 3226–36. <a href="https://doi.org/10.1002/adfm.200900600">https://doi.org/10.1002/adfm.200900600</a>.'
  ieee: 'V. Di Noto <i>et al.</i>, “Functional Chromium Wheel-Based Hybrid Organic-Inorganic
    Materials for Dielectric Applications,” <i>Advanced Functional Materials</i>,
    vol. 19, no. 20, pp. 3226–3236, 2009, doi: <a href="https://doi.org/10.1002/adfm.200900600">10.1002/adfm.200900600</a>.'
  mla: Di Noto, Vito, et al. “Functional Chromium Wheel-Based Hybrid Organic-Inorganic
    Materials for Dielectric Applications.” <i>Advanced Functional Materials</i>,
    vol. 19, no. 20, Wiley, 2009, pp. 3226–36, doi:<a href="https://doi.org/10.1002/adfm.200900600">10.1002/adfm.200900600</a>.
  short: V. Di Noto, A.B. Boeer, S. Lavina, C.A. Muryn, M. Bauer, G.A. Timco, E. Negro,
    M. Rancan, R.E.P. Winpenny, S. Gross, Advanced Functional Materials 19 (2009)
    3226–3236.
date_created: 2023-01-31T15:06:12Z
date_updated: 2023-01-31T15:06:24Z
department:
- _id: '306'
doi: 10.1002/adfm.200900600
intvolume: '        19'
issue: '20'
keyword:
- Electrochemistry
- Condensed Matter Physics
- Biomaterials
- Electronic
- Optical and Magnetic Materials
language:
- iso: eng
page: 3226-3236
publication: Advanced Functional Materials
publication_identifier:
  issn:
  - 1616-301X
  - 1616-3028
publication_status: published
publisher: Wiley
status: public
title: Functional Chromium Wheel-Based Hybrid Organic-Inorganic Materials for Dielectric
  Applications
type: journal_article
user_id: '48467'
volume: 19
year: '2009'
...
---
_id: '25975'
abstract:
- lang: eng
  text: The synthesis and characterization of ordered mesoporous In2O3 materials by
    structure replication from hexagonal mesoporous SBA-15 silica and cubic KIT-6
    silica is presented. Variation of the synthesis parameters allows for different
    pore sizes and pore wall thicknesses in the products. The In2O3 samples turn out
    to be stable up to temperatures between 450 °C and 650 °C; such high thermal stability
    is necessary for their application as gas sensors. Test measurements show a high
    sensitivity to methane gas in concentrations relevant for explosion prevention.
    The sensitivity is shown to be correlated not only with the surface-to-volume
    ratio, but also with the nanoscopic structural properties of the materials.
article_type: original
author:
- first_name: Thomas
  full_name: Waitz, Thomas
  last_name: Waitz
- first_name: Thorsten
  full_name: Wagner, Thorsten
  last_name: Wagner
- first_name: Tilman
  full_name: Sauerwald, Tilman
  last_name: Sauerwald
- first_name: Claus-Dieter
  full_name: Kohl, Claus-Dieter
  last_name: Kohl
- first_name: Michael
  full_name: Tiemann, Michael
  id: '23547'
  last_name: Tiemann
  orcid: 0000-0003-1711-2722
citation:
  ama: 'Waitz T, Wagner T, Sauerwald T, Kohl C-D, Tiemann M. Ordered Mesoporous In2O3:
    Synthesis by Structure Replication and Application as a Methane Gas Sensor. <i>Advanced
    Functional Materials</i>. Published online 2009:653-661. doi:<a href="https://doi.org/10.1002/adfm.200801458">10.1002/adfm.200801458</a>'
  apa: 'Waitz, T., Wagner, T., Sauerwald, T., Kohl, C.-D., &#38; Tiemann, M. (2009).
    Ordered Mesoporous In2O3: Synthesis by Structure Replication and Application as
    a Methane Gas Sensor. <i>Advanced Functional Materials</i>, 653–661. <a href="https://doi.org/10.1002/adfm.200801458">https://doi.org/10.1002/adfm.200801458</a>'
  bibtex: '@article{Waitz_Wagner_Sauerwald_Kohl_Tiemann_2009, title={Ordered Mesoporous
    In2O3: Synthesis by Structure Replication and Application as a Methane Gas Sensor},
    DOI={<a href="https://doi.org/10.1002/adfm.200801458">10.1002/adfm.200801458</a>},
    journal={Advanced Functional Materials}, author={Waitz, Thomas and Wagner, Thorsten
    and Sauerwald, Tilman and Kohl, Claus-Dieter and Tiemann, Michael}, year={2009},
    pages={653–661} }'
  chicago: 'Waitz, Thomas, Thorsten Wagner, Tilman Sauerwald, Claus-Dieter Kohl, and
    Michael Tiemann. “Ordered Mesoporous In2O3: Synthesis by Structure Replication
    and Application as a Methane Gas Sensor.” <i>Advanced Functional Materials</i>,
    2009, 653–61. <a href="https://doi.org/10.1002/adfm.200801458">https://doi.org/10.1002/adfm.200801458</a>.'
  ieee: 'T. Waitz, T. Wagner, T. Sauerwald, C.-D. Kohl, and M. Tiemann, “Ordered Mesoporous
    In2O3: Synthesis by Structure Replication and Application as a Methane Gas Sensor,”
    <i>Advanced Functional Materials</i>, pp. 653–661, 2009, doi: <a href="https://doi.org/10.1002/adfm.200801458">10.1002/adfm.200801458</a>.'
  mla: 'Waitz, Thomas, et al. “Ordered Mesoporous In2O3: Synthesis by Structure Replication
    and Application as a Methane Gas Sensor.” <i>Advanced Functional Materials</i>,
    2009, pp. 653–61, doi:<a href="https://doi.org/10.1002/adfm.200801458">10.1002/adfm.200801458</a>.'
  short: T. Waitz, T. Wagner, T. Sauerwald, C.-D. Kohl, M. Tiemann, Advanced Functional
    Materials (2009) 653–661.
date_created: 2021-10-09T05:31:04Z
date_updated: 2023-03-09T08:42:44Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1002/adfm.200801458
extern: '1'
language:
- iso: eng
page: 653-661
publication: Advanced Functional Materials
publication_identifier:
  issn:
  - 1616-301X
  - 1616-3028
publication_status: published
quality_controlled: '1'
status: public
title: 'Ordered Mesoporous In2O3: Synthesis by Structure Replication and Application
  as a Methane Gas Sensor'
type: journal_article
user_id: '23547'
year: '2009'
...
