Modification of self-assembled monolayers of alkanethiols on gold by ionizing radiation

Autor:	Ulrik Gelius, T. D. Dunbar, Mikael Wirde, David L. Allara
Rok vydání:	1997
Předmět:	Contact angle Nuclear and High Energy Physics chemistry.chemical_compound X-ray photoelectron spectroscopy chemistry Ellipsometry Infrared spectroscopy Surface modification Self-assembled monolayer Hexadecane Photochemistry Spectroscopy Instrumentation
Zdroj:	Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 131:245-251
ISSN:	0168-583X
DOI:	10.1016/s0168-583x(97)00140-7
Popis:	Self-assembled films of octadecanethiols on polycrystalline Au have been studied with monochromated X-ray photo-electron spectroscopy (XPS). The focus has been on the SAu interface. It is demonstrated that ionizing radiation causes breaking of SAu bonds and formation of disulfides. The modification of the alkane chains and the S headgroups has been investigated as a function of X-ray exposure. Long time X-ray exposed films have also been characterized by polarized reflection infrared spectroscopy, single-wavelength ellipsometry and water and hexadecane contact angle measurements. All these data show that in addition to the disulfide formation at the gold interface, the originally well ordered hydrophobic film is strongly modified by the ionizing radiation, involving CH and CC bond breaking, interchain cross linking and a general disordering of the film.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b99217741285ecebf919fa685b873beb https://doi.org/10.1016/s0168-583x(97)00140-7 Zobrazit plný text záznamu Full Text from ScienceDirect