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A comparative atomic force microscopic study of liquid crystal films: transferred freely-suspended vs. Langmuir-Blodgett : morphology, lattice, and manipulation
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 171261
Author(s) OVERNEY, RM; MEYER, E; FROMMER, J; GUNTHERODT, HJ; DECHER, G; REIBEL, J; SOHLING, U
Author(s) at UniBasel Meyer, Ernst
Year 1993
Title A comparative atomic force microscopic study of liquid crystal films: transferred freely-suspended vs. Langmuir-Blodgett : morphology, lattice, and manipulation
Journal Langmuir
Volume 9
Number 1
Pages / Article-Number 341-346
Abstract

The atomic force microscope (AFM) provides direct structural information on transferred freely-suspended films of liquid crystals, ranging from morphology on the ``large. scale of micrometers down to intermolecular spacing on the angstrom scale. Multilayer film thickness is measured, as well as monolayer step heights and unit cell parameters. We show here that these values for film thickness, step heights, and intermolecular spacing are often in good agreement with electron diffraction and X-ray reflectivity measurements. However, in some cases the AFM data reveal previously undetected lattices and defects. AFM measurements are also performed on Langmuir-Blodgett (LB) films of the same class of molecules, allowing comparison of the different film-forming techniques. The AFM has also been used as a tool to intentionally deform the films, creating features of tailored dimensions. The forces required to deform the films are discussed.

Publisher American Chemical Society
ISSN/ISBN 0743-7463
edoc-URL http://edoc.unibas.ch/dok/A5839509
Full Text on edoc No
Digital Object Identifier DOI 10.1021/la00025a063
ISI-Number WOS:A1993KJ10100063
Document type (ISI) Article
 
   

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