Mechanisms of reversible conformational transitions in a single molecule

被引：201

作者：

Qiu, XH

Nazin, GV

Ho, W ^{[1
]}

机构：

[1] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

[2] Univ Calif Irvine, Dept Chem, Irvine, CA 92697 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.93.196806

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The reversible interconversion between two nonplanar conformations of single Zn(II) Etioporphyrin I molecules adsorbed on a NiAl(110) surface at 13 K was induced by a scanning tunneling microscope (STM). The threshold voltage for the conformational change at negative sample bias depends linearly on the tip-sample distance, suggesting an electrostatic force mechanism. The reverse conversion involves inelastic electron tunneling via a molecular electronic resonance at 1.25 eV. In contrast with the photon-induced conformational changes, an electrically induced mechanism is realized with the STM.

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页码：196806 / 1

页数：4

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