Lead oxide nanobelts and phase transformation induced by electron beam irradiation

Pan, Z. W.; Dai, Z. R.; Wang, Z. L.
January 2002
Applied Physics Letters;1/14/2002, Vol. 80 Issue 2, p309
Academic Journal
β-PbO[sub 2] nanobelts, with a rectangular cross section, a typical length of 10–200 μm, a width of 50–300 nm, and a width-to-thickness ratio of 5–10, have been successfully synthesized by simple elevated evaporation of commercial PbO powders at high temperature. The PbO[sub 2] nanobelts are enclosed by top surfaces ±(201) and side surfaces ±(101¯) and their growth direction is [010]. Each PbO[sub 2] nanobelt is found to have a large polyhedral Pb tip at one of its ends, suggesting the growth is dominated by a vapor–liquid–solid mechanism. Electron beam irradiation of the PbO[sub 2] nanobelts results in the phase transformation from PbO[sub 2] to PbO and finally to Pb. © 2002 American Institute of Physics.


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