TY - JOUR A1 - Bauer, J. A1 - Schulz, Burkhard A1 - Brehmer, Ludwig A1 - Bötcher, M. A1 - Jagdhold, U. A1 - Höppner, K. A1 - Kulesch, A. A1 - Dietzel, Birgit T1 - Anwendung von Langmuir-Blodgett-Schichten als Resist für die Niederspannungs-Elektronenstrahl-Lithografie Y1 - 1995 ER - TY - JOUR A1 - Brehmer, Ludwig A1 - Dietzel, Birgit A1 - Freydank, Anke-Christine A1 - Katholy, Stefan A1 - Knochenhauer, Gerald A1 - Reiche, Jürgen A1 - Schulz, Burkhard A1 - Zetzsche, Thomas T1 - Langmuir- und Langmuir-Blodgett-Filme amphiphiler Oxadiazole Y1 - 1995 ER - TY - JOUR A1 - Brehmer, Ludwig A1 - Frübing, Peter A1 - Herkner, G. A1 - Kaminorz, Yvette T1 - Pyroelektrische Untersuchungen an dünnen Schichten von organischen Seitenkettenpolymeren Y1 - 1995 ER - TY - JOUR A1 - Brehmer, Ludwig A1 - Grasnick, G. A1 - Herkner, G. A1 - Kaminorz, Yvette T1 - Organic thin film pyrosensors Y1 - 1995 ER - TY - JOUR A1 - Brehmer, Ludwig A1 - Liemant, Alfred A1 - Müller, I. A1 - Albrecht, Fred T1 - Stochastic model for charge carrier transport in disordered solids Y1 - 1995 ER - TY - JOUR A1 - Dietel, Reinhard A1 - Penacorada, Florencio A1 - Brehmer, Ludwig T1 - Structural variations in Langmuir-Blodgett layers of arachidic acid studied by FTIR-reflection absorption spectroscopy Y1 - 1995 ER - TY - JOUR A1 - Dietzel, Birgit A1 - Freydank, A. A1 - Reiche, Jürgen A1 - Brehmer, Ludwig A1 - Knoblauch, H. A1 - Knochenhauer, Gerald A1 - Zetzsche, Thomas T1 - Mono- und Multischichten von neuen aromatischen 1,3,4-Oxadiazolen Y1 - 1995 ER - TY - JOUR A1 - Frübing, Peter A1 - Grasnick, G. A1 - Herkner, G. A1 - Janietz, Dietmar A1 - Brehmer, Ludwig T1 - Pyroelektrische Untersuchungen an Polyvinylalkoholen mit Azobenzen / Alkoxy - Seitenketten Y1 - 1995 ER - TY - JOUR A1 - Helms, Andreas A1 - Reiche, Jürgen A1 - Stiller, Burkhard A1 - Kobloch, H. A1 - Brehmer, Ludwig T1 - Herstellung dünner organischer Schichten durch Vakuumdeposition Y1 - 1995 ER - TY - JOUR A1 - Katholy, Stefan A1 - Reiche, Jürgen A1 - Brehmer, Ludwig T1 - Strukturuntersuchungen an Langmuir-Monoschichten organischer Amphiphile mittels Brewsterwinkelmikroskopie Y1 - 1995 ER - TY - JOUR A1 - Knobloch, Harald A1 - Woigk, S. A1 - Brehmer, Ludwig A1 - Yusupov, R. G. A1 - Rakhnyanskaya, A. T1 - Metalion adsorption to Langmuir-Blodgett films monitored by the optical waveguide technique Y1 - 1995 ER - TY - JOUR A1 - Knochenhauer, Gerald A1 - Reiche, Jürgen A1 - Barberka, Thomas Andreas A1 - Woolley, Martin A1 - Tredgold, Richard H. A1 - Hodge, P. A1 - Brehmer, Ludwig T1 - Do perfluorianted chains always have to be twisted? N2 - Short perfluorinated cabon chains do not take on helical structure when they are closely packed Y1 - 1995 ER - TY - JOUR A1 - Penacorada, Florencio A1 - Angelova, Angelina A1 - Kamusewitz, Helmut A1 - Reiche, Jürgen A1 - Brehmer, Ludwig T1 - Scanning Force Microscopy and Wetting study of the Surface Modification of a Polypropylene Mambrane by Means of Langmuir-Blodgett Film Deposition N2 - Polypropylene membranes with deposited ultrathin "siin" layers are attractive for separation and cleaning of gaseous mixtures. In the present study, the surface morphology and wetting hysteresis of composite membranes consisting of a microporous polypropylene support and Langmuir-Blodgett ("skin") films, are investigated. The effect of the interlayer molecular interactions and the substrate features on the integrity and homogeneity of the "skin" layers is examined. Langmuir-Blodgett films of arachidic acid and cadmium and calcium arachidate are characterized both on smooth silicon and on porous polypropylene supports. Contact angle measurements and scanning force microscopy (SFM) are applied for investigations of the membrane surface modification upon transfer of a different number of monolayers. It was found that the contact angle hysteresis of the bare membrane decreases after the LB-deposition of close-packed monolayers. Smoothing of the membrane surface is also evidenced by the SFM images, on different length scales, confirming a good coverage of the membrane pores. Y1 - 1995 ER - TY - JOUR A1 - Penacorada, Florencio A1 - Dietel, Reinhard A1 - Reiche, Jürgen A1 - Zetzsche, Thomas A1 - Knobloch, Harald A1 - Katholy, Stefan A1 - Brehmer, Ludwig T1 - Studium des Einflusses von Uranyl-Gegenionen auf die Struktur von Langmuir- und Langmuir-Blodgett Filmen der Arachinsäure Y1 - 1995 ER - TY - JOUR A1 - Penacorada, Florencio A1 - Reiche, Jürgen A1 - Katholy, Stefan A1 - Brehmer, Ludwig A1 - Rodriguez-Mendez, Maria-Luisa T1 - Monolayers and multilayers of uranyl arachidate : 1. study of the interaction of dissolved uranyl ions with arachidic acid Langmuir monolayers N2 - Langmuir monolayers of arachidic acid have been prepared on a subphase containing uranyl ions (O-U-O)ý+. The interaction between the uranyl ions and the monolayer of arachidic acid has been studied by means of surface pressure and surface potential isotherms and Brewster angle microscopy at different pH values (ranging from 1.5 to 8). A similar systematic study has been carried out in the presence of Cdý+ ions for comparison purposes. The surface pressure and surface potential isotherms demonstrate that the acid to salt conversion of arachidic acid in the presence of uranyl ions occurs at lower bulk pH values (pH=3.5) as compared with other bivalent metal counterions such as Cdý+. Changes in the surface morphology of the monolayer induced by the interaction with uranyl- and cadmium ions are analyzed and the correlation between the surface potential change and the morphology of the films is discussed. Y1 - 1995 ER - TY - JOUR A1 - Penacorada, Florencio A1 - Yusupov, R. G. A1 - Milaski, B. A1 - Frübing, Peter A1 - Brehmer, Ludwig T1 - Elektrische Eigenschaften von polyionischen LB-Filmen Y1 - 1995 ER - TY - JOUR A1 - Reiche, Jürgen A1 - Brehmer, Ludwig T1 - Einfluss des Transferverhältnisses auf die Monoschichtsymmetrie in Y-Typ Langmuir-Blodgett-Schichten Y1 - 1995 ER - TY - JOUR A1 - Reiche, Jürgen A1 - Dietzel, Birgit A1 - Freydank, Anke-Christine A1 - Geue, Thomas A1 - Pietsch, Ullrich A1 - Brehmer, Ludwig T1 - Lateral structure of thermally treated oxadiazole Langmuir-Blodgett films Y1 - 1995 ER - TY - JOUR A1 - Reiche, Jürgen A1 - Freydank, A. A1 - Dietzel, Birgit A1 - Katholy, Stefan A1 - Knochenhauer, Gerald A1 - Zetzsche, Thomas A1 - Schulz, Burkhard A1 - Brehmer, Ludwig T1 - Komplexe Strukturanalytik von Oxadiazol-Mono- und Multischichten Y1 - 1995 ER - TY - JOUR A1 - Reiche, Jürgen A1 - Janietz, Dietmar A1 - Barberka, Thomas Andreas A1 - Hofmann, Dieter A1 - Brehmer, Ludwig T1 - Comprehensive structure investigation of Langmuir-Blodgett films of disc-shaped molecules N2 - The structure of mono- and multilayers of amphiphilic disc-shaped pentaynes wa inbestigated by Brewsterangle microscopy, X-ray specular reflection and grazing incidence diffraction (GID). X-ray specular reflection experiments confirm the "edge on" arrangement of the molecular discs. The molecular modelling of the Langmuir-Blodgett (LB)- multilayers predicts a columnar in-plane packing of the molecules. A GID experiment with monochromatic synchrotron radiation was used to verify the predicted multilayer structure on molecular level, while the Brewsterangle microscopy gave a deeper insight in the monolayer in-plane structure on micron scale. Y1 - 1995 ER - TY - JOUR A1 - Reiche, Jürgen A1 - Kamusewitz, Helmut A1 - Keller, Manuela A1 - Brehmer, Ludwig A1 - Peñacorada, Florencio T1 - Study of gas transport through composite membranes with a stabilised Langmuir-Blodgett skin layer N2 - The Langmuir-Blodgett (LB-) technique is used to deposit molecular reinforced separation layers on porous polymer substrates resulting in composite membranes for gas separation. The adsorption of a polycation to the arachidic acid Langmuir layer and the subsequent transfer of the highly ordered and stabilised monolayer onto a polypropylene membrane (Cellgard 2400) yields a laminated separation layer combining the advantageous high degree of order of fatty acid films and the stability of thin polymeric films. X-ray reflectivity data of these films confirm the transfer of the assembled polymer layer together with the fatty acid monolayer and the formation of ordered Y-type LB-films. SFM pictures show a dense film without pinholes completely covering the porous support. Gas permeation measurements are used to study the transport process of different gases through the composite membrane. Y1 - 1995 ER - TY - JOUR A1 - Reiche, Jürgen A1 - Knochenhauer, Gerald A1 - Barberka, Thomas Andreas A1 - Geue, Thomas A1 - Pietsch, Ullrich A1 - Brehmer, Ludwig A1 - Hodge, P. A1 - Tredgold, Richard H. T1 - In-plane structure of perfluorotetra decanoic acid Langmuir-Blodgett films and films formed by vacuum deposition Y1 - 1995 ER - TY - JOUR A1 - Reiche, Jürgen A1 - Penacorada, Florencio A1 - Geue, Thomas A1 - Pietsch, Ullrich A1 - Brehmer, Ludwig T1 - In-plane structure of uranylarachidate multilayers Y1 - 1995 ER - TY - JOUR A1 - Reiche, Jürgen A1 - Penacorada, Florencio A1 - Zetzsche, Thomas A1 - Katholy, Stefan A1 - Brehmer, Ludwig T1 - Polyelektrolyt-Fettsäure-Multiphasen-LB-Schichten Y1 - 1995 ER - TY - JOUR A1 - Schulz, Burkhard A1 - Brehmer, Ludwig T1 - Preparation and characterization of ordered thin films based on aromatic poly(1,3,4-oxadiazole)s Y1 - 1995 ER - TY - JOUR A1 - Schulz, Burkhard A1 - Brehmer, Ludwig A1 - Dietzel, Birgit A1 - Zetzsche, Thomas T1 - Preparation and characterization of ordered thin films based on aromatic poly(1,3,4-oxadiazole)s Y1 - 1995 ER - TY - JOUR A1 - Schulz, Burkhard A1 - Brehmer, Ludwig A1 - Knochenhauer, Gerald T1 - Supramolecular structures of aromatic 1,3,4-oxadiazole solids Y1 - 1995 ER - TY - JOUR A1 - Schulz, Burkhard A1 - Knochenhauer, Gerald A1 - Brehmer, Ludwig A1 - Janietz, Silvia T1 - Stuctures and properties of aromatic poly(1,3,4-oxadiazole)s Y1 - 1995 ER - TY - JOUR A1 - Schulz, Burkhard A1 - Stiller, Burkhard A1 - Zetzsche, Thomas A1 - Knochenhauer, Gerald A1 - Dietel, Reinhard A1 - Brehmer, Ludwig T1 - Characterization of 2,5-di(p-tolyl-1,3,4- oxadiazole) crystals by IR-spectroscopy and atomic force microscopy Y1 - 1995 ER - TY - JOUR A1 - Yusupov, R. G. A1 - Frübing, Peter A1 - Brehmer, Ludwig A1 - Mislavski, B. V. T1 - Langmuir Filme des Polymers "NAFION" als sensibles Element eines Feuchtesensors Y1 - 1995 ER -