Semimetal to semiconductor transition and polymer electrolyte gate modulation in single-crystalline bismuth nanowires

Jeongmin Kim, Wooyoung Lee

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A semimetal to semiconductor transition in low-dimensional Bi nanowires is theoretically predicted based on the quantum confinement effect, which results in the enhancement of the thermoelectric performance. However, this transition has rarely been observed in the transport properties of gate modulation because of there being too few charge carriers induced by a typical electric field effect. In this paper, we report on our observations of the on-off state in a Bi nanowire using a polyethylene oxide/LiClO4 electrolyte gate, which produces a much larger effect than a back-gate. The carrier density of the surface state was found to be consistent with previously reported results. The intrinsic properties of the Bi nanowires, as obtained by temperature- and diameter-dependent gate modulations, are also discussed.

Original languageEnglish
Pages (from-to)923-929
Number of pages7
JournalNanoscale
Volume9
Issue number2
DOIs
Publication statusPublished - 2017 Jan 14

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Metalloids
Bismuth
Electrolytes
Nanowires
Polymers
Modulation
Semiconductor materials
Crystalline materials
Electric field effects
Quantum confinement
Surface states
Polyethylene oxides
Charge carriers
Transport properties
Carrier concentration
Temperature

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

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Semimetal to semiconductor transition and polymer electrolyte gate modulation in single-crystalline bismuth nanowires. / Kim, Jeongmin; Lee, Wooyoung.

In: Nanoscale, Vol. 9, No. 2, 14.01.2017, p. 923-929.

Research output: Contribution to journalArticle

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