期刊
NANOTECHNOLOGY
卷 22, 期 23, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/22/23/235602
关键词
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资金
- National Science Foundation [ECCS 0652905, CMMI 0758199]
- Nebraska Research Initiative
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [0758199] Funding Source: National Science Foundation
Branched nickel monosilicide (NiSi) nanowires (NWs), for the first time, have been synthesized on Ni foams by laser-assisted chemical vapor deposition using disilane precursor molecules. Studies indicate that 600 degrees C is the threshold temperature for the growth of a large number of branched NiSi NWs with 100-500 nm long branches extending from the main stems. Below the threshold temperature, unbranched NiSi NWs were obtained. The density of the branched NiSi NWs is relatively higher in comparison to that of the unbranched ones. The growth rate of the branched NiSi NWs at 700 degrees C is estimated up to 10 mu m min(-1). High-resolution transmission electron microscopy and energy-dispersive x-ray spectroscopy of the branched NiSi NWs suggest that the formation of these branched nanostructures is ascribed to the Ni-dominant diffusion process. These NiSi NWs with branched nanostructures could bring them new opportunities in nanodevices.
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