@article{YusupovFruebingBrehmeretal.1995, author = {Yusupov, R. G. and Fr{\"u}bing, Peter and Brehmer, Ludwig and Mislavski, B. V.}, title = {Langmuir Filme des Polymers "NAFION" als sensibles Element eines Feuchtesensors}, year = {1995}, language = {de} } @article{SchulzStillerZetzscheetal.1995, author = {Schulz, Burkhard and Stiller, Burkhard and Zetzsche, Thomas and Knochenhauer, Gerald and Dietel, Reinhard and Brehmer, Ludwig}, title = {Characterization of 2,5-di(p-tolyl-1,3,4- oxadiazole) crystals by IR-spectroscopy and atomic force microscopy}, year = {1995}, language = {en} } @article{SchulzKnochenhauerBrehmeretal.1995, author = {Schulz, Burkhard and Knochenhauer, Gerald and Brehmer, Ludwig and Janietz, Silvia}, title = {Stuctures and properties of aromatic poly(1,3,4-oxadiazole)s}, year = {1995}, language = {en} } @article{SchulzBrehmerKnochenhauer1995, author = {Schulz, Burkhard and Brehmer, Ludwig and Knochenhauer, Gerald}, title = {Supramolecular structures of aromatic 1,3,4-oxadiazole solids}, year = {1995}, language = {en} } @article{SchulzBrehmerDietzeletal.1995, author = {Schulz, Burkhard and Brehmer, Ludwig and Dietzel, Birgit and Zetzsche, Thomas}, title = {Preparation and characterization of ordered thin films based on aromatic poly(1,3,4-oxadiazole)s}, year = {1995}, language = {en} } @article{SchulzBrehmer1995, author = {Schulz, Burkhard and Brehmer, Ludwig}, title = {Preparation and characterization of ordered thin films based on aromatic poly(1,3,4-oxadiazole)s}, year = {1995}, language = {en} } @article{ReichePenacoradaZetzscheetal.1995, author = {Reiche, J{\"u}rgen and Penacorada, Florencio and Zetzsche, Thomas and Katholy, Stefan and Brehmer, Ludwig}, title = {Polyelektrolyt-Fetts{\"a}ure-Multiphasen-LB-Schichten}, year = {1995}, language = {de} } @article{ReichePenacoradaGeueetal.1995, author = {Reiche, J{\"u}rgen and Penacorada, Florencio and Geue, Thomas and Pietsch, Ullrich and Brehmer, Ludwig}, title = {In-plane structure of uranylarachidate multilayers}, year = {1995}, language = {en} } @article{ReicheKnochenhauerBarberkaetal.1995, author = {Reiche, J{\"u}rgen and Knochenhauer, Gerald and Barberka, Thomas Andreas and Geue, Thomas and Pietsch, Ullrich and Brehmer, Ludwig and Hodge, P. and Tredgold, Richard H.}, title = {In-plane structure of perfluorotetra decanoic acid Langmuir-Blodgett films and films formed by vacuum deposition}, year = {1995}, language = {en} } @article{ReicheKamusewitzKelleretal.1995, author = {Reiche, J{\"u}rgen and Kamusewitz, Helmut and Keller, Manuela and Brehmer, Ludwig and Pe{\~n}acorada, Florencio}, title = {Study of gas transport through composite membranes with a stabilised Langmuir-Blodgett skin layer}, year = {1995}, abstract = {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.}, language = {en} } @article{ReicheJanietzBarberkaetal.1995, author = {Reiche, J{\"u}rgen and Janietz, Dietmar and Barberka, Thomas Andreas and Hofmann, Dieter and Brehmer, Ludwig}, title = {Comprehensive structure investigation of Langmuir-Blodgett films of disc-shaped molecules}, year = {1995}, abstract = {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.}, language = {en} } @article{ReicheFreydankDietzeletal.1995, author = {Reiche, J{\"u}rgen and Freydank, A. and Dietzel, Birgit and Katholy, Stefan and Knochenhauer, Gerald and Zetzsche, Thomas and Schulz, Burkhard and Brehmer, Ludwig}, title = {Komplexe Strukturanalytik von Oxadiazol-Mono- und Multischichten}, year = {1995}, language = {de} } @article{ReicheDietzelFreydanketal.1995, author = {Reiche, J{\"u}rgen and Dietzel, Birgit and Freydank, Anke-Christine and Geue, Thomas and Pietsch, Ullrich and Brehmer, Ludwig}, title = {Lateral structure of thermally treated oxadiazole Langmuir-Blodgett films}, year = {1995}, language = {en} } @article{ReicheBrehmer1995, author = {Reiche, J{\"u}rgen and Brehmer, Ludwig}, title = {Einfluss des Transferverh{\"a}ltnisses auf die Monoschichtsymmetrie in Y-Typ Langmuir-Blodgett-Schichten}, year = {1995}, language = {de} } @article{PenacoradaYusupovMilaskietal.1995, author = {Penacorada, Florencio and Yusupov, R. G. and Milaski, B. and Fr{\"u}bing, Peter and Brehmer, Ludwig}, title = {Elektrische Eigenschaften von polyionischen LB-Filmen}, year = {1995}, language = {de} } @article{PenacoradaReicheKatholyetal.1995, author = {Penacorada, Florencio and Reiche, J{\"u}rgen and Katholy, Stefan and Brehmer, Ludwig and Rodriguez-Mendez, Maria-Luisa}, title = {Monolayers and multilayers of uranyl arachidate : 1. study of the interaction of dissolved uranyl ions with arachidic acid Langmuir monolayers}, year = {1995}, abstract = {Langmuir monolayers of arachidic acid have been prepared on a subphase containing uranyl ions (O-U-O){\´y}+. 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 Cd{\´y}+ 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 Cd{\´y}+. 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.}, language = {en} } @article{PenacoradaDietelReicheetal.1995, author = {Penacorada, Florencio and Dietel, Reinhard and Reiche, J{\"u}rgen and Zetzsche, Thomas and Knobloch, Harald and Katholy, Stefan and Brehmer, Ludwig}, title = {Studium des Einflusses von Uranyl-Gegenionen auf die Struktur von Langmuir- und Langmuir-Blodgett Filmen der Arachins{\"a}ure}, year = {1995}, language = {de} } @article{PenacoradaAngelovaKamusewitzetal.1995, author = {Penacorada, Florencio and Angelova, Angelina and Kamusewitz, Helmut and Reiche, J{\"u}rgen and Brehmer, Ludwig}, title = {Scanning Force Microscopy and Wetting study of the Surface Modification of a Polypropylene Mambrane by Means of Langmuir-Blodgett Film Deposition}, year = {1995}, abstract = {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.}, language = {en} } @article{KnochenhauerReicheBarberkaetal.1995, author = {Knochenhauer, Gerald and Reiche, J{\"u}rgen and Barberka, Thomas Andreas and Woolley, Martin and Tredgold, Richard H. and Hodge, P. and Brehmer, Ludwig}, title = {Do perfluorianted chains always have to be twisted?}, year = {1995}, abstract = {Short perfluorinated cabon chains do not take on helical structure when they are closely packed}, language = {en} } @article{KnoblochWoigkBrehmeretal.1995, author = {Knobloch, Harald and Woigk, S. and Brehmer, Ludwig and Yusupov, R. G. and Rakhnyanskaya, A.}, title = {Metalion adsorption to Langmuir-Blodgett films monitored by the optical waveguide technique}, year = {1995}, language = {en} }