Observation of anisotropy in thermoelectric properties of individual single-crystalline bismuth nanowires

Jeongmin Kim, Jong Wook Roh, Hongjae Moon, Wooyoung Lee

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The anisotropy in the thermoelectric-transport properties of single-crystalline Bi nanowires was systematically investigated. Bi nanowires were grown along the crystal orientations of the [-102] and [100] directions using the on-film formation of nanowires method. The electrical conductivity and Seebeck coefficient of Bi nanowires with different diameters were measured with respect to temperature in both directions. The temperature dependence in electrical conductivity exhibited a significant diameter dependence, and significant anisotropy was observed in the Seebeck coefficient. Anisotropy was also observed in the thermoelectric power factor. The thermoelectric figure of merit was estimated using our previously reported thermal-conductivity data, which indicate that [100]-oriented Bi nanowires are more suitable for thermoelectric applications than [-102] nanowires. This is the first report of the anisotropy investigating all the thermoelectric-transport properties of single-crystalline Bi nanowires.

Original languageEnglish
Article number034303
JournalJournal of Applied Physics
Volume122
Issue number3
DOIs
Publication statusPublished - 2017 Jul 21

Fingerprint

bismuth
nanowires
anisotropy
Seebeck effect
transport properties
electrical resistivity
figure of merit
thermal conductivity
temperature dependence
coefficients
crystals

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

@article{14008b522cc4400eb4c3b7a3d0c20dd3,
title = "Observation of anisotropy in thermoelectric properties of individual single-crystalline bismuth nanowires",
abstract = "The anisotropy in the thermoelectric-transport properties of single-crystalline Bi nanowires was systematically investigated. Bi nanowires were grown along the crystal orientations of the [-102] and [100] directions using the on-film formation of nanowires method. The electrical conductivity and Seebeck coefficient of Bi nanowires with different diameters were measured with respect to temperature in both directions. The temperature dependence in electrical conductivity exhibited a significant diameter dependence, and significant anisotropy was observed in the Seebeck coefficient. Anisotropy was also observed in the thermoelectric power factor. The thermoelectric figure of merit was estimated using our previously reported thermal-conductivity data, which indicate that [100]-oriented Bi nanowires are more suitable for thermoelectric applications than [-102] nanowires. This is the first report of the anisotropy investigating all the thermoelectric-transport properties of single-crystalline Bi nanowires.",
author = "Jeongmin Kim and Roh, {Jong Wook} and Hongjae Moon and Wooyoung Lee",
year = "2017",
month = "7",
day = "21",
doi = "10.1063/1.4994268",
language = "English",
volume = "122",
journal = "Journal of Applied Physics",
issn = "0021-8979",
publisher = "American Institute of Physics Publising LLC",
number = "3",

}

Observation of anisotropy in thermoelectric properties of individual single-crystalline bismuth nanowires. / Kim, Jeongmin; Roh, Jong Wook; Moon, Hongjae; Lee, Wooyoung.

In: Journal of Applied Physics, Vol. 122, No. 3, 034303, 21.07.2017.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Observation of anisotropy in thermoelectric properties of individual single-crystalline bismuth nanowires

AU - Kim, Jeongmin

AU - Roh, Jong Wook

AU - Moon, Hongjae

AU - Lee, Wooyoung

PY - 2017/7/21

Y1 - 2017/7/21

N2 - The anisotropy in the thermoelectric-transport properties of single-crystalline Bi nanowires was systematically investigated. Bi nanowires were grown along the crystal orientations of the [-102] and [100] directions using the on-film formation of nanowires method. The electrical conductivity and Seebeck coefficient of Bi nanowires with different diameters were measured with respect to temperature in both directions. The temperature dependence in electrical conductivity exhibited a significant diameter dependence, and significant anisotropy was observed in the Seebeck coefficient. Anisotropy was also observed in the thermoelectric power factor. The thermoelectric figure of merit was estimated using our previously reported thermal-conductivity data, which indicate that [100]-oriented Bi nanowires are more suitable for thermoelectric applications than [-102] nanowires. This is the first report of the anisotropy investigating all the thermoelectric-transport properties of single-crystalline Bi nanowires.

AB - The anisotropy in the thermoelectric-transport properties of single-crystalline Bi nanowires was systematically investigated. Bi nanowires were grown along the crystal orientations of the [-102] and [100] directions using the on-film formation of nanowires method. The electrical conductivity and Seebeck coefficient of Bi nanowires with different diameters were measured with respect to temperature in both directions. The temperature dependence in electrical conductivity exhibited a significant diameter dependence, and significant anisotropy was observed in the Seebeck coefficient. Anisotropy was also observed in the thermoelectric power factor. The thermoelectric figure of merit was estimated using our previously reported thermal-conductivity data, which indicate that [100]-oriented Bi nanowires are more suitable for thermoelectric applications than [-102] nanowires. This is the first report of the anisotropy investigating all the thermoelectric-transport properties of single-crystalline Bi nanowires.

UR - http://www.scopus.com/inward/record.url?scp=85024842953&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85024842953&partnerID=8YFLogxK

U2 - 10.1063/1.4994268

DO - 10.1063/1.4994268

M3 - Article

AN - SCOPUS:85024842953

VL - 122

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 3

M1 - 034303

ER -