Laser absorption scanning tunneling microscopy of carbon nanotubes

被引：31

作者：

Ballard, JB

Carmichael, ES

Shi, DX

Lyding, JW

Gruebele, M ^{[1
]}

机构：

[1] Univ Illinois, Beckman Inst Adv Sci & Technol, Urbana, IL 61801 USA

[2] Univ Illinois, Dept Chem, Urbana, IL 61801 USA

[3] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

[4] Univ Illinois, Ctr Biophys & Computat Biol, Urbana, IL 61801 USA

[5] Univ Illinois, Dept Elect & Comp Engn, Urbana, IL 61801 USA

来源：

NANO LETTERS | 2006年 / 6卷 / 01期

关键词：

D O I：

10.1021/nl0519231

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report single molecule laser absorption by carbon nanotubes stamped under ultrahigh vacuum onto Si(100)2x1:H surfaces. Absorption is detected by scanning tunneling microscopy. Images are obtained with and without modulated laser excitation using lock-in amplification and a rear-illumination geometry to reduce thermal effects. Noise appears at topographic edges and is analyzed by a quantitative model in terms of scan speed, mechanical instabilities, and feedback current fluctuations at the edge of the nanotubes. Noise due to mechanical instabilities is shown to persist even in the limit of slow scan speed.

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页码：45 / 49

页数：5

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