ICCAS OpenIR
Molecularly controlled modulation of conductance on azobenzene monolayer-modified silicon surfaces
Zhang, Xingye1; Wen, Yongqiang1; Li, Yingfeng1; Li, Guo2; Du, Shixuan2; Guo, Haiming2; Yang, Lianming1; Jiang, Lei1; Gao, Hongjun2; Song, Yanlin1
2008-06-05
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY C
ISSN1932-7447
Volume112Issue:22Pages:8288-8293
AbstractControlled modulation of silicon surface properties is of great importance for the development of silicon-based molecular electronic devices because of the ubiquitous role of silicon in microelectronics. In this article, photoresponsive azobenzene molecules were covalently grafted onto hydrogen-terminated Si(111) surfaces via Si-C linkages. These direct Si-C bond linkages are preferred over Si-O linkages at the interfaces because of the higher stability and the better electronic continuation between Si and the alkyl chain. The modified surfaces were characterized by X-ray photoelectron spectroscopy (XPS) and attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy. The reversible photoisomerization effects of the azobenzene molecules were also studied with contact angle measurements, atomic force microscopy (AFM), and conductive atomic force microscopy (C-AFM). The measured conductivity showed a reversible switching behavior by alternate illumination with UV and visible light. Thus, we have demonstrated molecularly controlled modulation of conductance of the Si surface by the photochemical method. Furthermore, the dipole moments of the azobenzene molecules switched accordingly with the alternate illumination. Making use of this characteristic, we have provided a strategy to evaluate the influence of the molecular dipole moments on the conductance of the semiconductor surface.
DOI10.1021/jp711808p
Indexed BySCI
Language英语
WOS IDWOS:000256265100032
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:43[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/63858
Collection中国科学院化学研究所
Corresponding AuthorWen, Yongqiang
Affiliation1.Chinese Acad Sci, Key Lab Organ Solids, New Mat Lab, Inst Chem, Beijing 100080, Peoples R China
2.Chinese Acad Sci, Nanoscale Phys & Device Lab, Inst Phys, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Xingye,Wen, Yongqiang,Li, Yingfeng,et al. Molecularly controlled modulation of conductance on azobenzene monolayer-modified silicon surfaces[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2008,112(22):8288-8293.
APA Zhang, Xingye.,Wen, Yongqiang.,Li, Yingfeng.,Li, Guo.,Du, Shixuan.,...&Song, Yanlin.(2008).Molecularly controlled modulation of conductance on azobenzene monolayer-modified silicon surfaces.JOURNAL OF PHYSICAL CHEMISTRY C,112(22),8288-8293.
MLA Zhang, Xingye,et al."Molecularly controlled modulation of conductance on azobenzene monolayer-modified silicon surfaces".JOURNAL OF PHYSICAL CHEMISTRY C 112.22(2008):8288-8293.
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