Wen Yongqiang, Yi Wenhui, Meng Lingjie, Feng Min, Jiang Guiyuan, Yuan Wenfang, Zhang Yuqi, Gao Hongjun, Jiang Lei, Song Yanlin
Organic Solids Laboratory, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100080, China.
J Phys Chem B. 2005 Aug 4;109(30):14465-8. doi: 10.1021/jp044256t.
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.
通过两步法，含偶氮苯的化合物经由硅氧键共价连接到Si(111)表面。通过X射线光电子能谱(XPS)和傅里叶变换红外(FT-IR)光谱测量对改性后的Si(111)表面进行了表征。单层表面表现出较好的化学稳定性。在交替暴露于紫外光和可见光下时，观察到这些改性表面上偶氮苯分子具有可切换的光异构化性能。在改性后的Si(111)表面上，所测得的电导率在偶氮苯化合物的反式和顺式形式之间显示出明显差异。
