期刊
APPLIED PHYSICS LETTERS
卷 97, 期 6, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3479502
关键词
adsorption; Green's function methods; hafnium compounds; isomerisation; multilayers; photoelectron spectra; photoemission; spectral line shift
资金
- DFG [SFB 677]
In situ photoelectron spectroscopy is used to study the adsorption and photoisomerization of azobenzene multilayers on the layered semiconductor HfS2 at liquid nitrogen temperatures. The measured valence band spectra indicate weak molecule-substrate coupling and provide evidence for reversible switching of azobenzene multilayers by light with different wavelengths. The photoswitching manifests itself in spectral shifts due to changes in the electrical surface conductance and in modifications of the electronic structure consistent with the results of outer valence Green's function calculations. The photoemission results appear to establish azobenzene as an optoelectrical molecular switch. (C) 2010 American Institute of Physics. [doi:10.1063/1.3479502]
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