Issue 41, 2017, Issue in Progress

Benchmark characterization of the thermoelectric properties of individual single-crystalline CdS nanowires by a H-type sensor

Abstract

A precision H-type sensor method has been developed to measure the thermoelectric performance of individual single-crystalline CdS nanowires for the first time. A nanomanipulation probe was used to directly pick up an individual nanowire from the array and place it on the sensor. Our method is generally applicable to any nanowire synthesized in either array or powder form. By simply changing the external electrical circuits, the Seebeck coefficient, thermal conductivity, and electrical conductivity have been measured on the same nanowire sample to ensure high accuracy and reliability. CdS nanowires have a large Seebeck coefficient over 300 μV K−1 due to their wide band gap, while their thermal conductivity is only one-tenth of that of the bulk material owing to the significant phonon-surface scattering. The figure of merit, ZT, of the CdS nanowire is 0.01 at 320 K, which is larger by two orders of magnitude than the value for a Bi2S3 nanowire, showing a trend of rapid increase above 300 K.

Graphical abstract: Benchmark characterization of the thermoelectric properties of individual single-crystalline CdS nanowires by a H-type sensor

Supplementary files

Article information

Article type
Paper
Submitted
06 Mar 2017
Accepted
01 May 2017
First published
10 May 2017
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2017,7, 25298-25304

Benchmark characterization of the thermoelectric properties of individual single-crystalline CdS nanowires by a H-type sensor

H. Wang, D. Zheng, X. Zhang, H. Takamatsu and W. Hu, RSC Adv., 2017, 7, 25298 DOI: 10.1039/C7RA02734F

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