Probing local electric field and conformational switching in single-molecule break junctions

被引：15
|
作者：
Rahimi, Maryam [1 ]
Troisi, Alessandro [2 ]
机构：
[1] Univ Washington, Dept Elect Engn, Microscale Life Sci Ctr, Seattle, WA 98195 USA
[2] Univ Warwick, Dept Chem, Ctr Comp Sci, Coventry CV4 7AL, W Midlands, England
来源：
PHYSICAL REVIEW B | 2009年 / 79卷 / 11期
关键词：
electromigration; molecular electronics; tunnelling spectra; vibrational modes; TUNNELING SPECTROSCOPY; MICROSCOPY; TRANSPORT; RECTIFICATION; CONDUCTANCE; ADSORPTION; SPECTRA; SHIFTS;
D O I：
10.1103/PhysRevB.79.113413
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
By performing inelastic electron tunneling spectroscopy on single-molecule junctions fabricated through electromigration, we were able to detect polarity-dependent frequency shifts in the molecular vibrational spectra. This observation in conjunction with a simple theoretical model is used to infer the magnitude of local electric field (a crucial and previously inaccessible parameter for understanding charge transport in single-molecule junctions) on the molecule. Electric field induced conformational changes are also detected within this set of measurements.
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页数：4
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