Photochemical-controlled switching based on azobenzene monolayer modified silicon (111) surface

Yongqiang Wen; Wenhui Yi; Lingjie Meng; Min Feng; Guiyuan Jiang; Wenfang Yuan; Yuqi Zhang; Hongjun Gao; Lei Jiang; Yanlin Song

doi:10.1021/jp044256t

Photochemical-controlled switching based on azobenzene monolayer modified silicon (111) surface

J Phys Chem B. 2005 Aug 4;109(30):14465-8. doi: 10.1021/jp044256t.

Authors

Yongqiang Wen¹, Wenhui Yi, Lingjie Meng, Min Feng, Guiyuan Jiang, Wenfang Yuan, Yuqi Zhang, Hongjun Gao, Lei Jiang, Yanlin Song

Affiliation

¹ Organic Solids Laboratory, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100080, China.

PMID: 16852822
DOI: 10.1021/jp044256t

Abstract

Azobenzene-containing compounds were covalently attached onto Si(111) surfaces via Si-O linkages using a two-step procedure. The modified Si(111) surfaces were characterized by X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FT-IR) spectroscopy measurements. The monolayer surface showed preferably chemical stability. Switchable photoisomerizability of azobenzene molecules on these modified surfaces was observed in response to alternating UV and visible light exposure. The measured conductivity showed distinct difference with trans and cis forms of azobenzene compounds on as-modified Si(111) surfaces.