Observation of current reversal in the scanning tunneling spectra of fullerene-like WS2 nanoparticles

被引：7

作者：

Azulay, D

Kopnov, F

Tenne, R

Balberg, I

Millo, O ^{[1
]}

机构：

[1] Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel

[2] Weizmann Inst Sci, Dept Mat & Interfaces, IL-76100 Rehovot, Israel

来源：

NANO LETTERS | 2006年 / 6卷 / 04期

关键词：

D O I：

10.1021/nl060044r

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Current-voltage characteristics measured using STM on fullerene-like WS2 nanoparticles show zero-bias current and contain segments in which the tunneling current flows opposite to the applied bias voltage. In addition, negative differential conductance peaks emerge in these reversed current segments, and the characteristics are hysteretic with respect to the change in the voltage sweep direction. Such unusual features resemble those appearing in cyclic voltammograms, but are uniquely observed here in tunneling spectra measured in vacuum, as well as in ambient and dry atmosphere conditions. This behavior is attributed to tunneling-driven electrochemical processes.

引用

页码：760 / 764

页数：5

共 26 条

[1] Density-functional-theory calculations of electronic band structure of single-crystal and single-layer WS2 -: art. no. 073413 [J].