Journal
JOURNAL OF ELECTRONIC MATERIALS
Volume 39, Issue 9, Pages 1960-1965Publisher
SPRINGER
DOI: 10.1007/s11664-009-1045-3
Keywords
Individual bismuth nanowire; quartz template; Seebeck coefficient; resistivity
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Funding
- Grants-in-Aid for Scientific Research [22560004] Funding Source: KAKEN
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An individual bismuth nanowire sample, 593 nm in diameter and 1.64 mm in length, has been successfully grown using a quartz template. The resistivity and the Seebeck coefficient of the nanowire at 300 K were 1.35 mu Omega m and -59 mu V/K, respectively, similar to those of a bismuth bulk sample. The temperature dependence of the resistivity was found to decrease with temperature from 300 K to 175 K and then increase with further temperature reduction below 175 K. The absolute value of the Seebeck coefficient decreased with temperature from 300 K to 90 K, and the sign of the Seebeck coefficient changed from negative to positive near 90 K. This result indicated that there was a small amount of contamination in the bismuth. The carrier density was estimated from the resistivity and Seebeck coefficient on the basis of limitation of the mean free path and a two-carrier model, and the observed temperature dependences are discussed.
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