@article{34651,
  author       = {{Bürger, Julius and Venugopal, Harikrishnan and Kool, Daniel and de los Arcos, Teresa and Gonzalez Orive, Alejandro and Grundmeier, Guido and Brassat, Katharina and Lindner, Jörg K.N.}},
  issn         = {{2196-7350}},
  journal      = {{Advanced Materials Interfaces}},
  keywords     = {{General Medicine}},
  number       = {{26}},
  publisher    = {{Wiley}},
  title        = {{{High‐Resolution Study of Changes in Morphology and Chemistry of Cylindrical PS‐            <i>b</i>            ‐PMMA Block Copolymer Nanomasks during Mask Development}}},
  doi          = {{10.1002/admi.202200962}},
  volume       = {{9}},
  year         = {{2022}},
}

@article{34086,
  author       = {{Bürger, Julius and Venugopal, Harikrishnan and Kool, Daniel and de los Arcos de Pedro, Maria Teresa and Gonzalez Orive, Alejandro and Grundmeier, Guido and Brassat, Katharina and Lindner, Jörg}},
  issn         = {{2196-7350}},
  journal      = {{Advanced Materials Interfaces}},
  keywords     = {{General Medicine}},
  number       = {{26}},
  publisher    = {{Wiley}},
  title        = {{{High‐Resolution Study of Changes in Morphology and Chemistry of Cylindrical PS‐            <i>b</i>            ‐PMMA Block Copolymer Nanomasks during Mask Development}}},
  doi          = {{10.1002/admi.202200962}},
  volume       = {{9}},
  year         = {{2022}},
}

@article{34092,
  abstract     = {{<jats:p>Block copolymer (BCP) self-assembly is a promising tool for next generation lithography as microphase separated polymer domains in thin films can act as templates for surface nanopatterning with sub-20 nm features. The replicated patterns can, however, only be as precise as their templates. Thus, the investigation of the morphology of polymer domains is of great importance. Commonly used analytical techniques (neutron scattering, scanning force microscopy) either lack spatial information or nanoscale resolution. Using advanced analytical (scanning) transmission electron microscopy ((S)TEM), we provide real space information on polymer domain morphology and interfaces between polystyrene (PS) and polymethylmethacrylate (PMMA) in cylinder- and lamellae-forming BCPs at highest resolution. This allows us to correlate the internal structure of polymer domains with line edge roughnesses, interface widths and domain sizes. STEM is employed for high-resolution imaging, electron energy loss spectroscopy and energy filtered TEM (EFTEM) spectroscopic imaging for material identification and EFTEM thickness mapping for visualisation of material densities at defects. The volume fraction of non-phase separated polymer species can be analysed by EFTEM. These methods give new insights into the morphology of polymer domains the exact knowledge of which will allow to improve pattern quality for nanolithography.</jats:p>}},
  author       = {{Bürger, Julius and Kunnathully, Vinay and Kool, Daniel and Lindner, Jörg and Brassat, Katharina}},
  issn         = {{2079-4991}},
  journal      = {{Nanomaterials}},
  keywords     = {{General Materials Science, General Chemical Engineering}},
  number       = {{1}},
  publisher    = {{MDPI AG}},
  title        = {{{Characterisation of the PS-PMMA Interfaces in Microphase Separated Block Copolymer Thin Films by Analytical (S)TEM}}},
  doi          = {{10.3390/nano10010141}},
  volume       = {{10}},
  year         = {{2020}},
}

@article{3912,
  abstract     = {{DNA origami nanostructures are versatile substrates for the controlled arrangement of molecular
capture sites with nanometer precision and thus have many promising applications in singlemolecule
bioanalysis. Here, we investigate the adsorption of DNA origami nanostructures in
nanohole arrays which represent an important class of biosensors and may benefit from the
incorporation of DNA origami-based molecular probes. Nanoholes with well-defined diameter
that enable the adsorption of single DNA origami triangles are fabricated in Au films on Siwafers by nanosphere lithography. The efficiency of directed DNA origami adsorption on the
exposed SiO2 areas at the bottoms of the nanoholes is evaluated in dependence of various
parameters, i.e., Mg2+ and DNA origami concentrations, buffer strength, adsorption time, and
nanohole diameter. We observe that the buffer strength has a surprisingly strong effect on DNA
origami adsorption in the nanoholes and that multiple DNA origami triangles with 120 nm edge
length can adsorb in nanoholes as small as 120 nm in diameter. We attribute the latter
observation to the low lateral mobility of once adsorbed DNA origami on the SiO2 surface, in
combination with parasitic adsorption to the Au film. While parasitic adsorption can be
suppressed by modifying the Au film with a hydrophobic self-assembled monolayer, the limited
surface mobility of the adsorbed DNA origami still leads to poor localization accuracy in the
nanoholes and results in many DNA origami crossing the boundary to the Au film even under
optimized conditions. We discuss possible ways to minimize this effect by varying the
composition of the adsorption buffer, employing different fabrication conditions, or using other
substrate materials for nanohole array fabrication.}},
  author       = {{Brassat, Katharina and Ramakrishnan, Saminathan and Bürger, Julius and Hanke, Marcel and Doostdar, Mahnaz and Lindner, Jörg and Grundmeier, Guido and Keller, Adrian}},
  issn         = {{0743-7463}},
  journal      = {{Langmuir}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{On the Adsorption of DNA Origami Nanostructures in Nanohole Arrays}}},
  doi          = {{10.1021/acs.langmuir.8b00793}},
  year         = {{2018}},
}

@article{22664,
  author       = {{Brassat, Katharina and Ramakrishnan, Saminathan and Bürger, Julius and Hanke, Marcel and Doostdar, Mahnaz and Lindner, Jörg and Grundmeier, Guido and Keller, Adrian}},
  issn         = {{0743-7463}},
  journal      = {{Langmuir}},
  pages        = {{14757--14765}},
  title        = {{{On the Adsorption of DNA Origami Nanostructures in Nanohole Arrays}}},
  doi          = {{10.1021/acs.langmuir.8b00793}},
  volume       = {{34}},
  year         = {{2018}},
}

@inproceedings{4416,
  author       = {{Brassat, Katharina and Riedl, Thomas and Lindner, Jörg}},
  location     = {{Heraklion (Greece)}},
  title        = {{{Self-assembled Surface Patterns for Controlled Nanoparticle Placement and Improved Semiconductor Heteroepitaxy}}},
  year         = {{2018}},
}

@article{4444,
  author       = {{Brassat, Katharina and Kool, Daniel and Lindner, Jörg}},
  journal      = {{To be submitted}},
  title        = {{{Modification of block copolymer lithography masks by O2 plasma treatment: Insights from lift off experiments, nanopore etching and free membranes}}},
  year         = {{2018}},
}

@article{3921,
  abstract     = {{Bottom-up patterning techniques allow for the creation of surfaces with ordered arrays of nanoscale features
on large areas. Two bottom-up techniques suitable for the formation of regular nanopatterns on
different length scales are nanosphere lithography (NSL) and block copolymer (BCP) lithography. In this
paper it is shown that NSL and BCP lithography can be combined to easily design hierarchically nanopatterned
surfaces of different materials. Nanosphere lithography is used for the pre-patterning of
surfaces with antidots, i.e. hexagonally arranged cylindrical holes in thin films of Au, Pt and TiO2 on SiO2,
providing a periodic chemical and topographical contrast on the surface suitable for templating in subsequent
BCP lithography. PS-b-PMMA BCP is used in the second self-assembly step to form hexagonally
arranged nanopores with sub-20 nm diameter within the antidots upon microphase separation. To
achieve this the microphase separation of BCP on planar surfaces is studied, too, and it is demonstrated
for the first time that vertical BCP nanopores can be formed on TiO2, Au and Pt films without using any
neutralization layers. To explain this the influence of surface energy, polarity and roughness on the microphase
separation is investigated and discussed along with the wetting state of BCP on NSL-pre-patterned
surfaces. The presented novel route for the creation of advanced hierarchical nanopatterns is easily applicable
on large-area surfaces of different materials. This flexibility makes it suitable for a broad range of
applications, from the morphological design of biocompatible surfaces for life science to complex
pre-patterns for nanoparticle placement in semiconductor technology.}},
  author       = {{Brassat, Katharina and Kool, Daniel and Bürger, Julius and Lindner, Jörg}},
  issn         = {{2040-3364}},
  journal      = {{Nanoscale}},
  number       = {{21}},
  pages        = {{10005--10017}},
  publisher    = {{Royal Society of Chemistry (RSC)}},
  title        = {{{Hierarchical nanopores formed by block copolymer lithography on the surfaces of different materials pre-patterned by nanosphere lithography}}},
  doi          = {{10.1039/c8nr01397g}},
  volume       = {{10}},
  year         = {{2018}},
}

@article{3923,
  abstract     = {{Dodecyl amine edge functionalized few-layer graphene oxide quantum dots were synthesized in good
yields. The covalent functionalization was demonstrated with NMR and AFM-IR. The resulting structure
and particle size was measured with AFM and HRTEM. The thermal stability of the compound was
investigated and showed a stability of up to 220 °C. The modified graphene oxide quantum dots showed
excellent solubility in various organic solvents, including ethers, methanol, toluene, n-hexane, heptane,
xylene, dichloromethane and toluene. The stability of a resulting toluene solution was also proven by
static light scattering measurements over several days. The excellent solubility gives the possibility of an
efficient and fast spray application of the functionalized graphene oxide quantum dots to steel surfaces.
Hence, the macroscopic friction behavior was investigated with a Thwing-Albert FP-2250 friction tester. A
thin film of the dodecyl amine functionalized graphene oxide quantum dots on steel lowered the friction
coefficient from 0.17 to 0.11 and revealed a significant corrosion inhibition effect.}},
  author       = {{Wolk, Andreas and Rosenthal, Marta and Neuhaus, Stephan and Huber, Klaus and Brassat, Katharina and Lindner, Jörg and Grothe, Richard and Grundmeier, Guido and Bremser, Wolfgang and Wilhelm, René}},
  issn         = {{2045-2322}},
  journal      = {{Scientific Reports}},
  number       = {{1}},
  publisher    = {{Springer Nature}},
  title        = {{{A Novel Lubricant Based on Covalent Functionalized Graphene Oxide Quantum Dots}}},
  doi          = {{10.1038/s41598-018-24062-2}},
  volume       = {{8}},
  year         = {{2018}},
}

@article{3925,
  abstract     = {{Site-specific formation of nanoscaled protein structures is a challenging task. Most known structuring
methods are either complex and hardly upscalable or do not apply to biological matter at all. The presented combination of enzyme mediated autodeposition and nanosphere lithography provides an easy-to-apply approach for the buildup of protein nanostructures over a large scale. The key factor is the tethering of enzyme to the support in designated areas. Those areas are provided via prepatterning of enzymatically active antidots with variable diameters. Enzymatically triggered protein addressing occurs exclusively at the intended areas and continues until the entire active area is coated. After this, the reaction self-terminates. The major advantage of the presented method lies in its easy applicability and upscalability. Large area structuring of entire support surfaces with features on the nanometer scale is performed efficiently and without the necessity of harsh conditions. These are valuable premises for large-scale applications with potentials in biosensor technology, nanoelectronics, and life sciences.}},
  author       = {{Rüdiger, Arne A. and Brassat, Katharina and Lindner, Jörg and Bremser, Wolfgang and Strube, Oliver I.}},
  issn         = {{0743-7463}},
  journal      = {{Langmuir}},
  number       = {{14}},
  pages        = {{4264--4270}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{Easily Accessible Protein Nanostructures via Enzyme Mediated Addressing}}},
  doi          = {{10.1021/acs.langmuir.7b04089}},
  volume       = {{34}},
  year         = {{2018}},
}

@inproceedings{3927,
  author       = {{Grundmeier, Guido and Brassat, Katharina and Keller, A. and Lindner, Jörg}},
  location     = {{Warsaw, Poland}},
  title        = {{{With directed self-arrangement of DNA origami to large-area quantum dot arrays}}},
  year         = {{2018}},
}

@inproceedings{3929,
  author       = {{Brassat, Katharina and Kool, Daniel and Lindner, Jörg}},
  location     = {{Warsaw, Poland}},
  title        = {{{Hierarchical nanopore and nanoring arrays by self-assembly techniques}}},
  year         = {{2018}},
}

@inproceedings{3930,
  author       = {{Brassat, Katharina and Taube, A. and Kool, Daniel and Tasche, L. and Hoyer, K.P. and Schaper, Mirko and Lindner, Jörg}},
  location     = {{Warsaw, Poland}},
  title        = {{{Ti-6Al-4V alloy: 3D printing of lightweight implants and nanopatterning by self-assembly}}},
  year         = {{2018}},
}

@inproceedings{3943,
  author       = {{Brassat, Katharina and Kool, Daniel and Taube, A. and Schaper, Mirko and Lindner, Jörg}},
  location     = {{Straßburg, France}},
  title        = {{{Morphology investigation of nanopores by block copolymer lithography on different material surfaces}}},
  year         = {{2018}},
}

@inproceedings{3944,
  author       = {{Brassat, Katharina and Brüngeler, A. and Bremser, W.  and Strube, O.I. and Lindner, Jörg}},
  location     = {{Straßburg, France}},
  title        = {{{Nanoscopic protein arrays on BCP prepatterned surfaces}}},
  year         = {{2018}},
}

@inproceedings{3945,
  author       = {{Brassat, Katharina and Ramakrishna, S. and Keller, A. and Lindner, Jörg}},
  location     = {{Phoenix (AZ), USA}},
  title        = {{{Hierarchical nanopatterns by site-selective DNA origami adsoprtion on pre-patterned surfaces}}},
  year         = {{2018}},
}

@inproceedings{3947,
  author       = {{Brassat, Katharina and Bremser, W. and Strube, O. and Grundmeier, G. and Keller, A. and Lindner, Jörg}},
  location     = {{Warsaw (Poland)}},
  title        = {{{Protein and DNA origami arrays on large areas by directed self-assembly }}},
  year         = {{2018}},
}

@inproceedings{3951,
  author       = {{Brassat, Katharina and Lindner, Jörg}},
  location     = {{Barcelona (Spain)}},
  title        = {{{Joining self-assembly techniques: A route to hierarchical nanopores}}},
  year         = {{2017}},
}

@inproceedings{3952,
  author       = {{Brassat, Katharina and Kool, Daniel and Bürger, Julius and Lindner, Jörg}},
  location     = {{Warsaw (Poland)}},
  title        = {{{Micro- and nanopatterned surfaces with tailored chemical and topographical contrast by self-assembly techniques}}},
  year         = {{2017}},
}

@inproceedings{3953,
  author       = {{Brassat, Katharina and Keller, A. and Grundmeier, G. and Bremser, W. and Strube, O. and Lindner, Jörg}},
  location     = {{Straßburg (France)}},
  title        = {{{Tailored antidot patterns created by nanosphere lithography for bioapplications}}},
  year         = {{2017}},
}