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Electronic properties of nanoentities revealed by electrically driven rotation

D. L. Fan, Frank Q. Zhu, Xiaobin Xu, Robert C. Cammarata and C. L. Chien
Proceedings of the National Academy of Sciences of the United States of America
Vol. 109, No. 24 (June 12, 2012), pp. 9309-9313
Stable URL: http://www.jstor.org/stable/41602659
Page Count: 5
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Electronic properties of nanoentities revealed by electrically driven rotation
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Abstract

Direct electric measurement via small contacting pads on individual quasi-one-dimensional nanoentities, such as nanowires and carbon nanotubes, are usually required to access its electronic properties. We show in this work that 1D nanoentities in suspension can be driven to rotation by AC electric fields. The chirality of the resultantrotation unambiguously reveals whether the nanoentities are metal, semiconductor, or insulator due to the dependence of the Clausius-Mossotti factor on the material conductivity and frequency. This contactless method provides rapid and parallel identification of the electrical characteristics of 1D nanoentities.

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