Abstract
We report growth and characterization of CdTe wires 30–400 nm in diameter by thevapor–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, andthe morphological changes due to Joule heating were observed in situ using atransmission 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 diameteron the surface of the wire. Smaller diameter nanowires, in contrast, disintegrateunder the applied bias before the complete evolution of SFNWs on the surface.
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