In Situ Gap-Mode Raman Spectroscopy on Single-Crystal Au(100) Electrodes: Tuning the Torsion Angle of 4,4 '-Biphenyldithiols by an Electrochemical Gate Field

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	In Situ Gap-Mode Raman Spectroscopy on Single-Crystal Au(100) Electrodes: Tuning the Torsion Angle of 4,4 '-Biphenyldithiols by an Electrochemical Gate Field
	Cui, Li ; Liu, Bo ; Vonlanthen, David ; Mayor, Marcel ; Fu, Yongchun ; Li, Jian-Feng ; Wandlowski, Thomas ; Liu B(刘波)
刊名	http://dx.doi.org/10.1021/ja2020185
	2011-05-18
关键词	SELF-ASSEMBLED MONOLAYERS SURFACE-ENHANCED RAMAN MOLECULAR JUNCTIONS CHARGE-TRANSFER CONFORMATION DEPENDENCE CONDUCTANCE FABRICATION SCATTERING CONTACTS
英文摘要	In situ gap-mode Raman spectra were acquired in an electrochemical environment on a single-crystal gold electrode employing a Au(100)\|4,4'-biphenyldithiol (BPDT)\|Au-NP(55 nm) sandwich assembly. This geometry enabled an investigation of the influence of an applied electrochemical gate field on the conformational changes in nanojunctions, such as the torsion angle (phi) of molecules. A linear correlation between the intensity ratio I-C=C/ICring-S and cos(2) phi in 4,4'-BPDT-type molecular junctions was established and subsequently utilized to estimate the potential dependence of the torsion angle of the "flexible" molecule M1 at different potentials. The latter decreases as the potential (charge) becomes more negative, resulting in better pi-pi coupling, which correlates with enhanced junction conductance. The demonstrated spectroelectrochemical strategy and the direct correlation of the spectroscopic results with (single) molecular conductance studies may guide the selection and elucidation of functional molecules for potential applications in novel nanodevices.
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/61297]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Cui, Li,Liu, Bo,Vonlanthen, David,et al. In Situ Gap-Mode Raman Spectroscopy on Single-Crystal Au(100) Electrodes: Tuning the Torsion Angle of 4,4 '-Biphenyldithiols by an Electrochemical Gate Field[J]. http://dx.doi.org/10.1021/ja2020185,2011.
APA	Cui, Li.,Liu, Bo.,Vonlanthen, David.,Mayor, Marcel.,Fu, Yongchun.,...&刘波.(2011).In Situ Gap-Mode Raman Spectroscopy on Single-Crystal Au(100) Electrodes: Tuning the Torsion Angle of 4,4 '-Biphenyldithiols by an Electrochemical Gate Field.http://dx.doi.org/10.1021/ja2020185.
MLA	Cui, Li,et al."In Situ Gap-Mode Raman Spectroscopy on Single-Crystal Au(100) Electrodes: Tuning the Torsion Angle of 4,4 '-Biphenyldithiols by an Electrochemical Gate Field".http://dx.doi.org/10.1021/ja2020185 (2011).