Detection of Molecular Alignment in Confined Films

Autor:	A. Legant, Michael Grunze, Martin Gurka, F. Eisert, Manfred Buck
Rok vydání:	2000
Předmět:	Length scale Multidisciplinary Materials science business.industry Shear force Second-harmonic generation Compression (physics) Molecular physics Silane chemistry.chemical_compound Tilt (optics) Optics chemistry Monolayer Molecule business
Zdroj:	Science
ISSN:	1095-9203 0036-8075
Popis:	Optical second harmonic generation was used to study the in-plane alignment of self-assembled silane monolayers attached to a glass surface under mechanical loading. The measurements allow correlation of the macroscopic forces acting on the monolayer with the average orientation and the azimuthal molecular alignment of the terminal molecular entity. Compression and shear forces lead to an alignment of the initially randomly oriented molecules on a macroscopic length scale. The change in azimuthal alignment of molecules under mechanical stress was found to be irreversible on the time scale of 12 hours, whereas changes of the molecular tilt angle were reversible.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b48b6167b8922c5b7a2330aff0b6a99 https://doi.org/10.1126/science.287.5452.468 Zobrazit plný text záznamu Plný text ve formátu PDF