Microscopy with a single-molecule scanning electrometer

被引：43
|
作者：
Lee, Joonhee [1 ]
Tallarida, Nicholas [1 ,3 ]
Chen, Xing [2 ]
Jensen, Lasse [2 ]
Apkarian, V. Ara [1 ]
机构：
[1] Univ Calif Irvine, Dept Chem, Irvine, CA 92697 USA
[2] Penn State Univ, Dept Chem, University Pk, PA 16802 USA
[3] Jet Prop Lab, Pasadena, CA 91109 USA
来源：
SCIENCE ADVANCES | 2018年 / 4卷 / 06期
关键词：
ENHANCED RAMAN SPECTROMICROSCOPY; ELECTRIC-FIELDS; CARBON-MONOXIDE; METAL-SURFACES; CO; ADSORPTION; AU(111); PORPHYRINS; TRANSITION; JUNCTION;
D O I：
10.1126/sciadv.aat5472
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
The vibrational spectrum of a single carbon monoxide molecule, adsorbed on the tip apex of a scanning tunneling microscope, is used to image electrostatic fields with submolecular spatial resolution. The method takes advantage of the vibrational Stark effect to image local electrostatic fields and the single-molecule sensitivity of tip-enhanced Raman scattering (TERS) to optically relay the signal. We apply the method to single metalloporphyrins adsorbed on Au(111) to image molecular charges, intramolecular polarization, local photoconductivity, atomically resolved hydrogen bonds, and surface electron density waves.
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页数：7
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