Diameter-dependent thermoelectric figure of merit in single-crystalline Bi nanowires

Jeongmin Kim, Seunghyun Lee, Yuri M. Brovman, Philip Kim, Wooyoung Lee

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

The diameter-dependent thermoelectric properties of individual single-crystalline Bi nanowires grown by the on-film formation of nanowires method have been investigated. The electrical resistivity, Seebeck coefficient, and thermal conductivity were measured as functions of the nanowire diameter using an individual nanowire device. The thermoelectric figure of merit (ZT) calculated from the measured thermoelectric properties shows an increase from the bulk value to a maximum value of 0.28 at 109 nm-diameter, followed by a decrease upon further decreasing the diameter. This non-monotonic diameter dependence of ZT in Bi nanowires reveals simultaneous positive and negative contributions to the thermoelectric efficiency, driven by the change in intrinsic properties, which originates from the diameter-dependent classical and quantum size effects.

Original languageEnglish
Pages (from-to)5053-5059
Number of pages7
JournalNanoscale
Volume7
Issue number11
DOIs
Publication statusPublished - 2015 Mar 21

Fingerprint

Nanowires
Crystalline materials
Seebeck coefficient
Thermal conductivity

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Kim, Jeongmin ; Lee, Seunghyun ; Brovman, Yuri M. ; Kim, Philip ; Lee, Wooyoung. / Diameter-dependent thermoelectric figure of merit in single-crystalline Bi nanowires. In: Nanoscale. 2015 ; Vol. 7, No. 11. pp. 5053-5059.
@article{5b9ef1ffc48d43fb83264073a99531b3,
title = "Diameter-dependent thermoelectric figure of merit in single-crystalline Bi nanowires",
abstract = "The diameter-dependent thermoelectric properties of individual single-crystalline Bi nanowires grown by the on-film formation of nanowires method have been investigated. The electrical resistivity, Seebeck coefficient, and thermal conductivity were measured as functions of the nanowire diameter using an individual nanowire device. The thermoelectric figure of merit (ZT) calculated from the measured thermoelectric properties shows an increase from the bulk value to a maximum value of 0.28 at 109 nm-diameter, followed by a decrease upon further decreasing the diameter. This non-monotonic diameter dependence of ZT in Bi nanowires reveals simultaneous positive and negative contributions to the thermoelectric efficiency, driven by the change in intrinsic properties, which originates from the diameter-dependent classical and quantum size effects.",
author = "Jeongmin Kim and Seunghyun Lee and Brovman, {Yuri M.} and Philip Kim and Wooyoung Lee",
year = "2015",
month = "3",
day = "21",
doi = "10.1039/c4nr06412g",
language = "English",
volume = "7",
pages = "5053--5059",
journal = "Nanoscale",
issn = "2040-3364",
publisher = "Royal Society of Chemistry",
number = "11",

}

Diameter-dependent thermoelectric figure of merit in single-crystalline Bi nanowires. / Kim, Jeongmin; Lee, Seunghyun; Brovman, Yuri M.; Kim, Philip; Lee, Wooyoung.

In: Nanoscale, Vol. 7, No. 11, 21.03.2015, p. 5053-5059.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Diameter-dependent thermoelectric figure of merit in single-crystalline Bi nanowires

AU - Kim, Jeongmin

AU - Lee, Seunghyun

AU - Brovman, Yuri M.

AU - Kim, Philip

AU - Lee, Wooyoung

PY - 2015/3/21

Y1 - 2015/3/21

N2 - The diameter-dependent thermoelectric properties of individual single-crystalline Bi nanowires grown by the on-film formation of nanowires method have been investigated. The electrical resistivity, Seebeck coefficient, and thermal conductivity were measured as functions of the nanowire diameter using an individual nanowire device. The thermoelectric figure of merit (ZT) calculated from the measured thermoelectric properties shows an increase from the bulk value to a maximum value of 0.28 at 109 nm-diameter, followed by a decrease upon further decreasing the diameter. This non-monotonic diameter dependence of ZT in Bi nanowires reveals simultaneous positive and negative contributions to the thermoelectric efficiency, driven by the change in intrinsic properties, which originates from the diameter-dependent classical and quantum size effects.

AB - The diameter-dependent thermoelectric properties of individual single-crystalline Bi nanowires grown by the on-film formation of nanowires method have been investigated. The electrical resistivity, Seebeck coefficient, and thermal conductivity were measured as functions of the nanowire diameter using an individual nanowire device. The thermoelectric figure of merit (ZT) calculated from the measured thermoelectric properties shows an increase from the bulk value to a maximum value of 0.28 at 109 nm-diameter, followed by a decrease upon further decreasing the diameter. This non-monotonic diameter dependence of ZT in Bi nanowires reveals simultaneous positive and negative contributions to the thermoelectric efficiency, driven by the change in intrinsic properties, which originates from the diameter-dependent classical and quantum size effects.

UR - http://www.scopus.com/inward/record.url?scp=84924325116&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84924325116&partnerID=8YFLogxK

U2 - 10.1039/c4nr06412g

DO - 10.1039/c4nr06412g

M3 - Article

AN - SCOPUS:84924325116

VL - 7

SP - 5053

EP - 5059

JO - Nanoscale

JF - Nanoscale

SN - 2040-3364

IS - 11

ER -