Chemical Resolution at Ionic Crystal Surfaces Using Dynamic Atomic Force Microscopy with Metallic Tips

被引：49

作者：

Teobaldi, G. ^{[1
]}

Laemmle, K. ^{[2
]}

Trevethan, T. ^{[3
,4
]}

Watkins, M. ^{[5
]}

Schwarz, A. ^{[2
]}

Wiesendanger, R. ^{[2
]}

Shluger, A. L. ^{[3
,4
]}

机构：

[1] Univ Liverpool, Dept Chem, Surface Sci Res Ctr, Liverpool L69 3BX, Merseyside, England

[2] Univ Hamburg, Inst Appl Phys, D-20355 Hamburg, Germany

[3] UCL, Dept Phys & Astron, London WC1E 6BT, England

[4] Tohoku Univ, WPI AIMR, Aoba Ku, Sendai, Miyagi 9808577, Japan

[5] UCL, London Ctr Nanotechnol, London WC1H 0AH, England

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 21期

基金：

英国工程与自然科学研究理事会;

关键词：

WORK FUNCTION;

D O I：

10.1103/PhysRevLett.106.216102

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate that well prepared and characterized Cr tips can provide atomic resolution on the bulk NaCl(001) surface with dynamic atomic force microscopy in the noncontact regime at relatively large tip-sample separations. At these conditions, the surface chemical structure can be resolved yet tip-surface instabilities are absent. Our calculations demonstrate that chemical identification is unambiguous, because the interaction is always largest above the anions. This conclusion is generally valid for other polar surfaces, and can thus provide a new practical route for straightforward interpretation of atomically resolved images.

引用

页数：4

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