Nano Archive

In situ observation of morphological change in CdTe nano- and submicron wires

Davami, Keivan and Ghassemi, Hessam M and Sun, Xuhui and Yassar, Reza S and Lee, Jeong-Soo and Meyyappan, M (2011) In situ observation of morphological change in CdTe nano- and submicron wires. Nanotechnology, 22 (43). p. 435204.

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Official URL: http://stacks.iop.org/0957-4484/22/i=43/a=435204

Abstract

We report growth and characterization of CdTe wires 30–400 nm in diameter by the vapor–liquid–solid technique. Individual nanowires were placed on a movable piezotube, which allowed three-dimensional motion toward a scanning tunneling microscope (STM). A bias was applied to the STM tip in contact with the nanowire, and the morphological changes due to Joule heating were observed in situ using a transmission electron microscope (TEM) in real time. For thick CdTe wires ( d > ~ 150 nm), the process results in the growth of superfine nanowires (SFNWs) of 2–4 nm diameter on the surface of the wire. Smaller diameter nanowires, in contrast, disintegrate under the applied bias before the complete evolution of SFNWs on the surface.

Item Type:Article
ID Code:11126
Deposited By:Prof. Alexey Ivanov
Deposited On:01 Nov 2011 23:22
Last Modified:02 Nov 2011 00:47

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