Direct growth of compound semiconductor nanowires by on-film formation of nanowires: Bismuth telluride

Jinhee Ham, Wooyoung Shim, Do Hyun Kim, Seunghyun Lee, Jongwook Roh, Sung Woo Sohn, Kyu Hwan Oh, Peter W. Voorhees, Wooyoung Lee

Research output: Contribution to journalArticle

67 Citations (Scopus)

Abstract

Bismuth telluride (Bi2Te3) nanowires are of great interest as nanoscale building blocks for high-efficiency thermoelectric devices. Their lowdimensional character leads to an enhanced figure-of-merit (ZT), an indicator of thermoelectric efficiency. Herein, we report the invention of a direct growth method termed On-Film Formation of Nanowires (OFF-ON) for making high-quality single-crystal compound semiconductor nanowires, that is, Bi2Te3, without the use of conventional templates, catalysts, or starting materials. We have used the OFF-ON technique to grow single crystal compound semiconductor Bi2Te3 nanowires from sputtered BiTe films after thermal annealing at 350 °C. The mechanism for wire growth is stress-induced mass flow along grain boundaries in the polycrystalline film. OFF-ON is a simple but powerful method for growing perfect single-crystal compound semiconductor nanowires of high aspect ratio with high crystallinity that distinguishes it from other competitive growth approaches that have been developed to date.

Original languageEnglish
Pages (from-to)2867-2872
Number of pages6
JournalNano letters
Volume9
Issue number8
DOIs
Publication statusPublished - 2009 Aug 12

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bismuth tellurides
Bismuth
Nanowires
nanowires
Semiconductor materials
Single crystals
single crystals
inventions
mass flow
Patents and inventions
bismuth telluride
high aspect ratio
figure of merit
Aspect ratio
crystallinity
Grain boundaries
templates
grain boundaries
wire
Wire

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Ham, Jinhee ; Shim, Wooyoung ; Kim, Do Hyun ; Lee, Seunghyun ; Roh, Jongwook ; Sohn, Sung Woo ; Oh, Kyu Hwan ; Voorhees, Peter W. ; Lee, Wooyoung. / Direct growth of compound semiconductor nanowires by on-film formation of nanowires : Bismuth telluride. In: Nano letters. 2009 ; Vol. 9, No. 8. pp. 2867-2872.
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Direct growth of compound semiconductor nanowires by on-film formation of nanowires : Bismuth telluride. / Ham, Jinhee; Shim, Wooyoung; Kim, Do Hyun; Lee, Seunghyun; Roh, Jongwook; Sohn, Sung Woo; Oh, Kyu Hwan; Voorhees, Peter W.; Lee, Wooyoung.

In: Nano letters, Vol. 9, No. 8, 12.08.2009, p. 2867-2872.

Research output: Contribution to journalArticle

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AU - Ham, Jinhee

AU - Shim, Wooyoung

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AU - Roh, Jongwook

AU - Sohn, Sung Woo

AU - Oh, Kyu Hwan

AU - Voorhees, Peter W.

AU - Lee, Wooyoung

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