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Journal of Nanomaterials
Volume 2007 (2007), Article ID 36435, 5 pages
http://dx.doi.org/10.1155/2007/36435
Research Article

Shape of Field-Induced Nanostructures Formed by STM

Department of Physics and Meteorology, Indian Institute of Technology, Kharagpur 721302, India

Received 13 September 2006; Accepted 11 October 2006

Academic Editor: Rakesh K. Joshi

Copyright © 2007 Subhashis Gangopadhyay et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Creation of controlled and reproducible nanostructures on material surfaces using scanning tunneling microscope is a novel technique, which can be used for a variety of applications. We have examined the shape of the nanostructures so formed on the gold film using tungsten tip and examined the formation parameters, which govern their shape and size. During our investigations it is found that the reproducibility of mound formation can reach up to 90% under optimum operating conditions, whereas the pit formation can be made with almost 100% reproducibility. Formation mechanism of such nanostructures is also discussed.