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phys_org 00010.txt

#Scalable growth of high quality bismuth nanowires Bismuth nanowires have intriguing electronic and energy harvesting application possibilities. However fabricating these materials with high quality and in large quantities is challenging. A group at the CFN Brookhaven National Laboratory has demonstrated a new technique to produce single-crystal nanowires atop arbitrary substrates including glass silicon and metal when an intermediate layer of vanadium is present.##The simplicity of the technique and the universality of the mechanism open a new avenue for the growth of nanowire arrays of a variety of materials. This is the first report on the high yield(>70%)synthesis of single crystalline bismuth nanowires a material with potentially exploitable and intriguing thermoelectric properties.##This technique produces bismuth nanowires in quantities limited only by the size of the substrate on which they are deposited.##The dimensions of the bismuth nanowires can be tuned over a very wide range simply by varying the substrate's temperature.##Further in contrast with other fabrication methods with this new technique there is no need for a catalyst to activate the production of the nanowires thus avoiding inevitable contamination and enabling high-quality material. CFN Capabilities: CFN's Materials Synthesis and Characterization Electron microscopy and Advanced UV and X-ray Probes Facilities were used for synthesis of nanowires and their structural characterization. Explore further: Uniform nanowire arrays for science and manufacturing More information: Surface energy induced formation of single crystalline bismuth nanowires over vanadium thin film at room temperature. Nano Letters 14 5630#5635 (2014) DOI: 10.1021/nl502208 2

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