TY - GEN A1 - Bresch, Harald A1 - Meyer-Plath, Asmus A1 - Burgdorf, T. A1 - Packroff, R. A1 - Apel, P. A1 - Adolf, P. A1 - Jesse, A. A1 - Leuschner, C. A1 - Bosse, H. A1 - Dubbert, W. A1 - Epp, A. A1 - Gebel, T. A1 - Götz, M. A1 - Herzberg, F. A1 - Hornbogen, T. A1 - Kersten, N. A1 - Kneuer, C. A1 - Kujath, P. A1 - Pipke, R. A1 - Plitzko, s. A1 - Schlesier, K. A1 - Schröder, F. A1 - Schwirn, K. A1 - Sommer, Y. A1 - Tentschert, J. A1 - Völker, D. A1 - Wolf, T. T1 - 1. Bilanz zur gemeinsamen Forschungsstrategie der Ressortforschungseinrichtungen des Bundes 'Nanotechnologie - Gesundheits- und Umweltrisiken von Nanomaterialien' (2007 - 2011) KW - Nanotechnologie KW - Nanopartikel KW - Nanomaterial KW - Bundesoberbehörden KW - Forschungsstrategie PY - 2013 SP - 1 EP - 124 CY - Berlin AN - OPUS4-28538 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Weh, K. A1 - Noack, M. A1 - Hoffmann, Katrin A1 - Schröder, K.-P. A1 - Caro, J. T1 - Change of gas permeation by photoinduced switching of zeolite-azobenzene membranes of type MFI and FAU N2 - FAU membranes of type Na–X and MFI membranes of type silicalite-1 which contain adsorbed azobenzene (AZB), have photoswitchable permeation properties due to the trans–cis photoisomerization of AZB. The change of gas permeation through these host–guest composite membranes depends on the irradiation wavelength, the quality of the membranes and the amount of adsorbed AZB. The permeances of the gases in the trans-form of the zeolite-encapsulated AZB were higher than those in the cis-form. The separation factors of equimolar mixtures of N2/CO2 and CH4/CO2 fed through the FAU–AZB membrane were higher at trans-switching than at cis-switching. The changes of the permeances of single gases and of the separation factors of equimolar gas mixtures by photoinduced trans–cis switching were found to be reversible over numerous switching cycles. The experimental results are in agreement with predictions made by Monte Carlo simulations for passing of permeant gases through these host–guest systems with the zeolite-hosted AZB in the trans- and in the cis-configuration. PY - 2002 DO - https://doi.org/10.1016/S1387-1811(02)00331-1 SN - 1387-1811 SN - 1873-3093 VL - 54 IS - 1-2 SP - 15 EP - 26 PB - Elsevier CY - Amsterdam AN - OPUS4-1752 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Schröder, K. A1 - Meyer-Plath, Asmus A1 - Keller, D. A1 - Ohl, A. T1 - On the Applicability of Plasma Assisted Chemical Micropatterning to Different Polymeric Biomaterials N2 - A plasma process sequence has been developed to prepare chemical micropatterns on polymeric biomaterial surfaces. These patterns induce a guided localized cell layover at microscopic dimension. Two subsequent plasma steps are applied. In the first functionalization step a microwave ammonia plasma introduces amino groups to obtain areas for very good cell adhesion; the second passivation step combines pattern generation and creation of cell repelling areas. This downstream microwave hydrogen plasma process removes functional groups and changes the linkages of polymer chains at the outermost surfaces. Similar results have been obtained on different polymers including polystyrene (PS), polyhydroxyethylmethacrylate (PHEMA), polyetheretherketone (PEEK), polyethyleneterephthalate (PET) and polyethylenenaphthalate (PEN). Such a rather universal chemical structuring process could widen the availability of biomaterials with specific surface preparations. KW - Microwave plasma KW - Ammonia KW - Hydrogen KW - Polymer surface KW - Cell culture KW - XPS KW - Fluorescence PY - 2002 DO - https://doi.org/10.1023/A:1016239302194 SN - 1084-0184 SN - 1572-8978 VL - 7 IS - 2 SP - 103 EP - 125 PB - Plenum Press CY - New York, NY AN - OPUS4-1729 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Schröder, K. A1 - Ohl, A. A1 - Meyer-Plath, Asmus T1 - Plasma assisted chemical micropatterning for biomedical purposes T2 - APP Spring Meeting CY - Bad Honnef, Germany DA - 2003-02-23 PY - 2003 AN - OPUS4-3918 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CHAP A1 - Schießl, P. A1 - Meng, Birgit A1 - Adam, G. A1 - Rößler, G. A1 - Schröder, P. A1 - Schwamborn, B. A1 - Wallner, B. A1 - Wiegrink, K. ED - Zilch, K. ED - Diederichs, C. J. T1 - Baustoffe PY - 2002 SN - 3-540-65760-6 IS - Kap. 3.1 SP - 3-3-3-60 PB - Springer CY - Berlin AN - OPUS4-2070 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Finke, B. A1 - Meyer-Plath, Asmus A1 - Schröder, K. A1 - Ohl, A. ED - d'Agostino, R. T1 - Analysis of plasma-generated radicals on polymer surfaces N2 - Plasma functionalisation in gas phase like ammonia allows to equip polymer surfaces with amino functional groups. An important question of this functionalisation consists in the limited knowledge about heterogeneous interface reactions, especially radical formation and subsequent reaction processes. Useful analytical methods comparable to those avilable for gas phase reactions are scarce. Here we report on investigations on plasma generated C-radicals by NO-labelling, showing similatr effects for different plasmas. T2 - 16th International Symposium on Plasma Chemistry (ISPC-16) CY - Taormina, Italy DA - 2003-06-22 PY - 2003 IS - CD-ROM SP - 1 EP - 6(?) PB - Dep. of Chemistry, Univ. CY - Bari AN - OPUS4-2613 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Schröder, K. A1 - Ihrke, R. A1 - Meyer-Plath, Asmus A1 - Finke, B. A1 - Diener, A. A1 - Nebe, B. A1 - Ohl, A. ED - d'Agostino, R. T1 - Surface functionalization in ammonia microwave plasmas for biomedical applications T2 - 16th International Symposium on Plasma Chemistry (ISPC-16) CY - Taormina, Italy DA - 2003-06-22 PY - 2003 IS - CD-ROM PB - Dep. of Chemistry, Univ. CY - Bari AN - OPUS4-2614 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Müller-Rochholz, J. A1 - Bronstein, Z. A1 - Schröder, Hartmut A1 - Rybak, Thomas A1 - Zeynalov, Eldar A1 - v. Maubeuge, K. P. ED - Delmas, P. T1 - Long-term behaviour of geosynthetic drains - excavations on landfills after up to 12 years service T2 - 7th International Conference on Geosynthetics (ICG) CY - Nice, France DA - 2002-09-22 PY - 2002 SN - 90-5809-525-8 VL - 2 SP - 565 EP - 568 PB - Balkema CY - Lisse AN - OPUS4-1902 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - von Woedtke, T. A1 - Abel, P. A1 - Schröder, K. A1 - Schwock, A. A1 - Krüger, Jörg A1 - Kautek, Wolfgang T1 - Biosensor-Membranen mit "Analyt-Fenster" T2 - 8. Internationale Messe mit Kongreß für Sensoren, Meßaufnehmer & Systeme ; 8th International Fair with Congress for Sensors, Transducers & Systems CY - Nürnberg, Deutschland DA - 1997-05-13 PY - 1997 VL - 2 SP - 101 EP - 106 PB - ACS Organisations GmbH CY - Wunstorf AN - OPUS4-11959 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Meyer-Plath, Asmus A1 - Finke, B. A1 - Schröder, K. A1 - Ohl, A. T1 - Pulsed and cw microwave plasma excitation for surface functionalization in nitrogen-containing gases N2 - Results are presented of polymer surface functionalization processes in pulsed and continuous wave (cw) microwave-excited plasmas in nitrogen-containing gases under admixture of hydrogen. A maximum selectivity of 100% for amino groups with respect to all nitrogen functional groups (NH2/N) was obtained in cw microwave (MW) plasmas either for very short treatment durations below 100 µs in pure NH3, or within approximately 10 s in hydrogen-rich nitrogen-containing plasmas. The amino and overall nitrogen surface densities, NH2/C and N/C, reach up to 3.5% and 35%, respectively. Post plasma processes of functionalized polymers are discussed in the light of monofunctionalization. Down to pulse duration of 1 ms, plasma decomposition rates of NH3, determined by infrared absorption spectroscopy, are found to scale linearly with the duty cycle. In this regime, the main effect of a duty cycle variation in pulsed NH3 plasmas on surface functionalization can be interpreted to result from changes in the concentration of the dominant stable species in the gas phase, NH3, N2 and H2, which are activated by subsequent plasma pulses. With increasing duty cycle, NH3 decomposition to N2 and 3H2 more and more dominates over the supply of fresh NH3. The nitrogen-removing role of hydrogen in the plasma is discussed in detail, whereas the role of the numerous transient nitrogen-containing species remains to be studied in the future. KW - Pulsed microwave plasma KW - Amino group KW - Polymer KW - Ammonia KW - Infrared absorption PY - 2003 DO - https://doi.org/10.1016/S0257-8972(03)00563-2 SN - 0257-8972 VL - 174-175 SP - 877 EP - 881 PB - Elsevier Science CY - Lausanne AN - OPUS4-13512 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -