@article{13664, author = {{Lange, B. and Posner, R. and Pohl, K. and Thierfelder, C. and Grundmeier, Guido and Blankenburg, S. and Schmidt, Wolf Gero}}, issn = {{0039-6028}}, journal = {{Surface Science}}, pages = {{60--64}}, title = {{{Water adsorption on hydrogenated Si(111) surfaces}}}, doi = {{10.1016/j.susc.2008.10.030}}, volume = {{603}}, year = {{2009}}, } @article{13655, author = {{Thissen, P. and Grundmeier, Guido and Wippermann, S. and Schmidt, Wolf Gero}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{24}}, title = {{{Water adsorption on the α-Al2O3(0001) surface}}}, doi = {{10.1103/physrevb.80.245403}}, volume = {{80}}, year = {{2009}}, } @book{63089, author = {{Fechner, Sabine}}, publisher = {{Logos}}, title = {{{Effects of context-oriented learning on student interest and achievement in chemistry education}}}, volume = {{95}}, year = {{2009}}, } @inproceedings{4181, abstract = {{We experimentally and theoretically investigate microdisk resonators with embedded quantum dots immersed in a liquid crystal in its nematic phase, showing the tunabililty of the photonic modes via external parameters like temperature or electric field.}}, author = {{Förstner, Jens and Meier, Cedrik and Piegdon, Karoline and Declair, Stefan and Hoischen, Andreas and Urbanski, Mark and Meier, Torsten and Kitzerow, Heinz-Siegfried}}, booktitle = {{Advances in Optical Sciences Congress}}, isbn = {{9781557528735}}, keywords = {{tet_topic_microdisk}}, location = {{Honolulu, Hawaii United States}}, publisher = {{OSA Technical Digest (CD) (Optical Society of America, 2009), paper NTuC2}}, title = {{{Coupling Dynamics of Quantum Dots in a Liquid-Crystal-Tunable Microdisk Resonator}}}, doi = {{10.1364/nlo.2009.ntuc2}}, year = {{2009}}, } @article{35349, abstract = {{The effect of Berry’s phase on the nuclear quadrupole resonance (NQR) spectra of rotating powder samples is studied experimentally, and its application for the determination of the electric field gradient asymmetry η is demonstrated. The NQR frequency splittings, which are observed for the spin 3/2 nucleus of 35Cl in powder samples of p-dichlorobenzene (C6H4Cl2) and cyanuric chloride (C3N3Cl3), are interpreted as a manifestation of Berry’s phase, associated with the adiabatically changing Hamiltonian due to sample rotation. The accumulation of Berry’s phase during the rotation process is responsible for the observed dependence of the NQR line shape on the rotation frequency and the asymmetry parameter. The proposed method for the determination of η involves the analysis of the NQR powder patterns of the rotating samples.}}, author = {{Sinyavsky, Nikolay and Maćkowiak, Mariusz and Schmidt, Claudia}}, issn = {{1865-7109}}, journal = {{Zeitschrift für Naturforschung A}}, keywords = {{Physical and Theoretical Chemistry, General Physics and Astronomy, Mathematical Physics}}, number = {{1-2}}, pages = {{81--87}}, publisher = {{Walter de Gruyter GmbH}}, title = {{{Manifestation of Berry’s Phase in Nuclear Quadrupole Resonance Spectra of Rotating Powder Samples}}}, doi = {{10.1515/zna-2008-1-214}}, volume = {{63}}, year = {{2008}}, } @article{35351, author = {{Medronho, B. and Shafaei, S. and Szopko, R. and Miguel, M. G. and Olsson, U. and Schmidt, Claudia}}, issn = {{0743-7463}}, journal = {{Langmuir}}, keywords = {{Electrochemistry, Spectroscopy, Surfaces and Interfaces, Condensed Matter Physics, General Materials Science}}, number = {{13}}, pages = {{6480--6486}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Shear-Induced Transitions between a Planar Lamellar Phase and Multilamellar Vesicles: Continuous versus Discontinuous Transformation}}}, doi = {{10.1021/la800326a}}, volume = {{24}}, year = {{2008}}, } @inbook{35350, author = {{Schmidt, Claudia}}, booktitle = {{Modern Magnetic Resonance}}, isbn = {{9781402038945}}, publisher = {{Springer Netherlands}}, title = {{{Rheo-NMR Spectroscopy}}}, doi = {{10.1007/1-4020-3910-7_168}}, year = {{2008}}, } @inproceedings{7642, author = {{Piegdon, Karoline A. and Matthias, Heinrich and Meier, Cedrik and Kitzerow, Heinz-Siegfried}}, booktitle = {{Emerging Liquid Crystal Technologies III}}, editor = {{Chien, Liang-Chy}}, publisher = {{SPIE}}, title = {{{Tunable optical properties of photonic crystals and semiconductor microdisks using liquid crystals}}}, doi = {{10.1117/12.774194}}, year = {{2008}}, } @article{22611, author = {{Rümmeli, M. H. and Schäffel, F. and de los Arcos de Pedro, Maria Teresa and Haberer, D. and Bachmatiuk, A. and Kramberger, C. and Ayala, P. and Borowiak-Palen, E. and Adebimpe, D. and Gemming, T. and Leonhardt, A. and Rellinghaus, B. and Schultz, L. and Pichler, T. and Büchner, B.}}, issn = {{0370-1972}}, journal = {{physica status solidi (b)}}, pages = {{1939--1942}}, title = {{{On the graphitisation role of oxide supports in carbon nanotube CVD synthesis}}}, doi = {{10.1002/pssb.200879597}}, year = {{2008}}, } @article{39749, author = {{Hoischen, A. and Benning, S. A. and Kitzerow, Heinz-Siegfried}}, issn = {{0003-6951}}, journal = {{Applied Physics Letters}}, keywords = {{Physics and Astronomy (miscellaneous)}}, number = {{13}}, publisher = {{AIP Publishing}}, title = {{{Submicrometer periodic patterns fixed by photopolymerization of dissipative structures}}}, doi = {{10.1063/1.2990762}}, volume = {{93}}, year = {{2008}}, } @article{39751, author = {{Redler, Andreas and Kitzerow, Heinz-Siegfried}}, issn = {{0003-6951}}, journal = {{Applied Physics Letters}}, keywords = {{Physics and Astronomy (miscellaneous)}}, number = {{18}}, publisher = {{AIP Publishing}}, title = {{{Influence of doping on the photorefractive properties of a polymer-dispersed liquid crystal}}}, doi = {{10.1063/1.3021364}}, volume = {{93}}, year = {{2008}}, } @article{39757, abstract = {{It is well known that robust and reliable photonic crystal structures can be manufactured with very high precision by electrochemical etching of silicon wafers, which results in two- and three-dimensional photonic crystals made of macroporous silicon. However, tuning of the photonic properties is necessary in order to apply these promising structures in integrated optical devices. For this purpose, different effects have been studied, such as the infiltration with addressable dielectric liquids (liquid crystals), the utilization of Kerr-like nonlinearities of the silicon, or free-charge carrier injection by means of linear (one-photon) and nonlinear (two-photon) absorptions. The present article provides a review, critical discussion, and perspectives about state-of-the-art tuning capabilities.}}, author = {{Kitzerow, Heinz-Siegfried and Matthias, Heinrich and Schweizer, Stefan L. and van Driel, Henry M. and Wehrspohn, Ralf B.}}, issn = {{1687-6393}}, journal = {{Advances in Optical Technologies}}, publisher = {{Hindawi}}, title = {{{Tuning of the Optical Properties in Photonic Crystals Made of Macroporous Silicon}}}, volume = {{2008}}, year = {{2008}}, } @article{41276, author = {{Graziola, Francesco and Girardi, Fabrizio and Bauer, Matthias and Di Maggio, Rosa and Rovezzi, Mauro and Bertagnolli, Helmut and Sada, Cinzia and Rossetto, Gilberto and Gross, Silvia}}, issn = {{0032-3861}}, journal = {{Polymer}}, keywords = {{Polymers and Plastics, Materials Chemistry, Organic Chemistry}}, number = {{20}}, pages = {{4332--4343}}, publisher = {{Elsevier BV}}, title = {{{UV-photopolymerisation of poly(methyl methacrylate)-based inorganic–organic hybrid coatings and bulk samples reinforced with methacrylate-modified zirconium oxocluster}}}, doi = {{10.1016/j.polymer.2008.08.005}}, volume = {{49}}, year = {{2008}}, } @article{41277, author = {{Rill, Christoph and Bauer, Matthias and Bertagnolli, Helmut and Kickelbick, Guido}}, issn = {{0021-9797}}, journal = {{Journal of Colloid and Interface Science}}, keywords = {{Colloid and Surface Chemistry, Surfaces, Coatings and Films, Biomaterials, Electronic, Optical and Magnetic Materials}}, number = {{1}}, pages = {{179--186}}, publisher = {{Elsevier BV}}, title = {{{Microemulsion approach to neodymium, europium, and ytterbium oxide/hydroxide colloids—Effects of precursors and preparation parameters on particle size and crystallinity}}}, doi = {{10.1016/j.jcis.2008.05.008}}, volume = {{325}}, year = {{2008}}, } @article{41278, author = {{Akdogan, Yasar and Vogt, Christina and Bauer, Matthias and Bertagnolli, Helmut and Giurgiu, Liviu and Roduner, Emil}}, issn = {{1463-9076}}, journal = {{Physical Chemistry Chemical Physics}}, keywords = {{Physical and Theoretical Chemistry, General Physics and Astronomy}}, number = {{20}}, publisher = {{Royal Society of Chemistry (RSC)}}, title = {{{Platinum species in the pores of NaX, NaY and NaA zeolites studied using EPR, XAS and FTIR spectroscopies}}}, doi = {{10.1039/b718932j}}, volume = {{10}}, year = {{2008}}, } @article{41279, author = {{Wu, Jin-Ming and Antonietti, Markus and Gross, Silvia and Bauer, Matthias and Smarsly, Bernd M.}}, issn = {{1439-4235}}, journal = {{ChemPhysChem}}, keywords = {{Physical and Theoretical Chemistry, Atomic and Molecular Physics, and Optics}}, number = {{5}}, pages = {{748--757}}, publisher = {{Wiley}}, title = {{{Ordered Mesoporous Thin Films of Rutile TiO2 Nanocrystals Mixed with Amorphous Ta2O5}}}, doi = {{10.1002/cphc.200700679}}, volume = {{9}}, year = {{2008}}, } @article{41999, author = {{Liu, Jianing and Rieger, Jens and Huber, Klaus}}, issn = {{0743-7463}}, journal = {{Langmuir}}, keywords = {{Electrochemistry, Spectroscopy, Surfaces and Interfaces, Condensed Matter Physics, General Materials Science}}, number = {{15}}, pages = {{8262--8271}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Analysis of the Nucleation and Growth of Amorphous CaCO3 by Means of Time-Resolved Static Light Scattering}}}, doi = {{10.1021/la8006519}}, volume = {{24}}, year = {{2008}}, } @article{25980, abstract = {{Mesoporous SBA-15 (space group p6mm), KIT-6 (Ia3d) and KIT-5 (Fm3m) silicas, exhibiting different 2-D and 3-D channel- or cage-like pore structure and pore dimensions have been used as supports for iron oxide nanoparticles. The iron modification of the silica was performed according to a frequently used impregnation technique from aqueous iron nitrate solution. The materials were characterized by nitrogen physisorption, X-ray diffraction, TEM–EDX, Moessbauer spectroscopy, and temperature-programmed reduction (TPR) and tested in the catalytic decomposition of methanol. It is established that the location and dispersion of iron oxide nanoparticles are affected by the pore topology of the support. The most homogeneously dispersed iron oxide nanoparticles are observed using silica host matrix exhibiting a 3-D channel-like structure and pore diameters about 7 nm, and the thus-obtained composites exhibit high catalytic activity and selectivity in methanol decomposition to CO and hydrogen. For all the samples, characterized with a low mesopore volume and small pore diameters/pore entrances, the formation of larger iron oxide particles, mainly located on the outer surface, is observed. Inhomogeneously dispersed iron oxide particles with a large fraction of isolated, strongly interacting with the support, iron species, and possessing low catalytic activity and usually high selectivity to methane, are found for the silicas with relatively larger pores/pore entrances.}}, author = {{Tsoncheva, Tanya and Rosenholm, Jessica and Linden, Mika and Kleitz, Freddy and Tiemann, Michael and Ivanova, Ljubomira and Dimitrov, Momtchil and Paneva, Daniela and Mitov, Ivan and Minchev, Christo}}, issn = {{1387-1811}}, journal = {{Microporous and Mesoporous Materials}}, pages = {{327--337}}, title = {{{Critical evaluation of the state of iron oxide nanoparticles on different mesoporous silicas prepared by an impregnation method}}}, doi = {{10.1016/j.micromeso.2007.10.005}}, year = {{2008}}, } @article{25979, abstract = {{Various measures to optimise the impregnation of mesoporous CMK-3 carbon and SBA-15 silica matrices with metal nitrates for the synthesis of mesoporous metal oxides by structure replication are investigated. The effect of surface modification of the matrix pores, the choice of a solvent with suitable polarity, and the concentration of the metal nitrate solution are studied in detail. The efficiency of pore loading is monitored by nitrogen physisorption measurements. The creation of polar functions at the pore surface of CMK-3 carbon is shown to increase the impregnation efficiency substantially while maximizing the pore wall polarity of SBA-15 silica by increasing the amount of free silanol groups does not have any significant impact. The choice of a less polar solvent (THF instead of water) has a positive effect on the wettability of CMK-3 carbon in the first impregnation cycle but turns out to be disadvantageous in the second cycle; a similar trend is observed for variation of the metal salt concentration.}}, author = {{Roggenbuck, Jan and Waitz, Thomas and Tiemann, Michael}}, issn = {{1387-1811}}, journal = {{Microporous and Mesoporous Materials}}, pages = {{575--582}}, title = {{{Synthesis of mesoporous metal oxides by structure replication: Strategies of impregnating porous matrices with metal salts}}}, doi = {{10.1016/j.micromeso.2007.12.018}}, year = {{2008}}, } @article{25982, abstract = {{Iron (III) containing nanoparticles with superparamagnetic behaviour are prepared via deposition on various mesoporous supports (MgO, CeO2 and SBA-15). XRD, TEM-EDX, N2 physisorption, FTIR, and Moessbauer spectroscopy are used for their characterization. The reductive properties and catalytic behaviour in methanol decomposition of the materials are also studied. Depending on the chemical nature of the support, the predominant formation of: isolated iron species, strongly interacting with the support (for SBA-15), mixture of hematite and binary MgFe2O4 nanoparticles (for MgO) or almost homogeneously dispersed hematite particles (for CeO2) are observed. The state of iron species strongly affects their catalytic properties. The favorable effect of the support mesoporosity on the catalytic activity is most pronounced for the iron modified CeO2.}}, author = {{Tsoncheva, Tanya and Roggenbuck, Jan and Tiemann, Michael and Ivanova, Lyubomira and Paneva, Daniela and Mitov, Ivan and Minchev, Christo}}, issn = {{1387-1811}}, journal = {{Microporous and Mesoporous Materials}}, pages = {{339--346}}, title = {{{Iron oxide nanoparticles supported on mesoporous MgO and CeO2: A comparative physicochemical and catalytic study}}}, doi = {{10.1016/j.micromeso.2007.06.021}}, year = {{2008}}, }