TY  - JOUR
A1  - Herrmann, A.
A1  - Kaupp, G.
A1  - Geue, Thomas
A1  - Pietsch, Ullrich
T1  - AFM and GID investigations of the gas-solid diazotation of 4-sulfanil-acid-monohydrat single crystals
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Paschke, K.
A1  - Geue, Thomas
A1  - Barberka, Thomas Andreas
A1  - Bolm, A.
A1  - Pietsch, Ullrich
A1  - Rösch, M.
A1  - Batke, Edwin
A1  - Faller, F.
A1  - Kerkel, K.
A1  - Oshiniwo, J.
A1  - Forchel, Alfred
T1  - Characterization of lateral semiconductor nano structures by means of x-ray grazing-incidence diffraction
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Reiche, Jürgen
A1  - Penacorada, Florencio
A1  - Geue, Thomas
A1  - Pietsch, Ullrich
A1  - Brehmer, Ludwig
T1  - Monolayers and multilayers of uranyl arachidate : in-plane structure of uranyl arachidate multilayers
N2  - The molecular in-plane structure of uranyl arachidate Langmuir-Blodgett (LB) films formed at different subphase pH values was analysed by means of X-ray grazing-incidence diffraction. For multilayers formed at low subphase pH a reorganisation of the arachidic acid film structure is confirmed. At appropriate subphase pH values, reorganisation of the film structure, e.g. via the formation of three-dimensional crystallites, is prevented by the presence of the uranyl ions and by the subsequent introduction of conformational disorder (gauche defects) in the alkyl chains. The observation of a macroscopic flow-induced in-plane texture in these uranyl arachidate LB films has profound implications for the design of ordered, supramolecular structures by the Langmuir-Blodgett technique.
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Reiche, Jürgen
A1  - Knochenhauer, Gerald
A1  - Dietel, Reinhard
A1  - Freydank, Anke-Christine
A1  - Zetzsche, Thomas
A1  - Pietsch, Ullrich
A1  - Brehmer, Ludwig
A1  - Barberka, Thomas Andreas
A1  - Geue, Thomas
T1  - Structure of thermally treated oxadiazoleamide Langmuir-Blodgett films
N2  - The thermal treatment of Y-type Langmuir-Blodgett (LB) films formed from the amphiphilic derivative of 2,5- diphenyl-1,3,4-oxadiazole 1 results in changes of the molecular packing. These changes have been analysed by a combination of X-ray specular reflectivity data, X-ray grazing incidence diffraction data and scanning force microscopy images, On the basis of these experimental data we have simulated possible supramolecular structures, These simulations provide insight into the intermolecular interactions giving rise to the observed structural transitions. The crystalline structure induced by thermal treatment of the LB films is characterized by a uniaxial texture, which is correlated with the dipping direction during deposition of the LB film.
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Pietsch, Ullrich
A1  - Barberka, Thomas Andreas
A1  - Geue, Thomas
A1  - Stömmer, Ralph
T1  - X-ray scattering from thin organic films and multilayers
Y1  - 1997
ER  -