Photochemical-controlled switching based on azobenzene monolayer modified silicon (111) surface.
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.
Wen
Yongqiang
Y
Organic Solids Laboratory, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100080, China.
Yi
Wenhui
W
Meng
Lingjie
L
Feng
Min
M
Jiang
Guiyuan
G
Yuan
Wenfang
W
Zhang
Yuqi
Y
Gao
Hongjun
H
Jiang
Lei
L
Song
Yanlin
Y