論文

査読有り
2017年8月

True Vapor-Liquid-Solid Process Suppresses Unintentional Carrier Doping of Single Crystalline Metal Oxide Nanowires

NANO LETTERS
  • Hiroshi Anzai
  • ,
  • Masaru Suzuki
  • ,
  • Kazuki Nagashima
  • ,
  • Masaki Kanai
  • ,
  • Zetao Zhu
  • ,
  • Yong He
  • ,
  • Mickael Boudot
  • ,
  • Guozhu Zhang
  • ,
  • Tsunaki Takahashi
  • ,
  • Katsuichi Kanemoto
  • ,
  • Takehito Seki
  • ,
  • Naoya Shibata
  • ,
  • Takeshi Yanagida

17
8
開始ページ
4698
終了ページ
4705
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/acs.nanolett.7b01362
出版者・発行元
AMER CHEMICAL SOC

Single crystalline nanowires composed of semiconducting metal oxides formed via a vapor-liquid-solid (VLS) process exhibit an electrical conductivity even without an intentional carrier doping, although these stoichiometric metal oxides are ideally insulators. Suppressing this unintentional doping effect has been a challenging issue not only for metal oxide nanowires but also for various nanostructured metal oxides toward their semiconductor applications. Here we demonstrate that a pure VLS crystal growth, which occurs only at liquid-solid (LS) interface, substantially suppresses an unintentional doping of single crystalline SnO2 nanowires. By strictly tailoring the crystal growth interface of VLS process, we found the gigantic difference of electrical conduction (up to 7 orders of magnitude) between nanowires formed only at LS interface and those formed at both LS and vapor-solid (VS) interfaces. On the basis of investigations with spatially resolved single nanowire electrical measurements, plane-view electron energy-loss spectroscopy, and molecular dynamics simulations, we reveal the gigantic suppression of unintentional carrier doping only for the crystal grown at LS interface due to the higher annealing effect at LS interface compared with that grown at VS interface. These implications will be a foundation to design the semiconducting properties of various nanostructured metal oxides.

Web of Science ® 被引用回数 : 14

リンク情報
DOI
https://doi.org/10.1021/acs.nanolett.7b01362
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000407540300022&DestApp=WOS_CPL

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