論文

査読有り 本文へのリンクあり
2019年7月

Convection-Flow-Assisted Preparation of a Strong Electron Dopant, Benzyl Viologen, for Surface-Charge Transfer Doping of Molybdenum Disulfide

ChemistryOpen
  • Keigo Matsuyama
  • ,
  • Akito Fukui
  • ,
  • Kohei Miura
  • ,
  • Hisashi Ichimiya
  • ,
  • Yuki Aoki
  • ,
  • Yuki Yamada
  • ,
  • Atsushi Ashida
  • ,
  • Takeshi Yoshimura
  • ,
  • Norifumi Fujimura
  • ,
  • Daisuke Kiriya

8
7
開始ページ
908
終了ページ
914
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.1002/open.201900169

© 2019 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. Transition metal dichalcogenides (TMDCs) have received attention as atomically thin post-silicon semiconducting materials. Tuning the carrier concentrations of the TMDCs is important, but their thin structure requires a non-destructive modulation method. Recently, a surface-charge transfer doping method was developed based on contacting molecules on TMDCs, and the method succeeded in achieving a large modulation of the electronic structures. The successful dopant is a neutral benzyl viologen (BV0); however, the problem remains of how to effectively prepare the BV0 molecules. A reduction process with NaBH4 in water has been proposed as a preparation method, but the NaBH4 simultaneously reacts vigorously with the water. Here, a simple method is developed, in which the reaction vial is placed on a hotplate and a fragment of air-stable metal is used instead of NaBH4 to prepare the BV0 dopant molecules. The prepared BV0 molecules show a strong doping ability in terms of achieving a degenerate situation of a TMDC, MoS2. A key finding in this preparation method is that a convection flow in the vial effectively transports the produced BV0 to a collection solvent. This method is simple and safe and facilitates the tuning of the optoelectronic properties of nanomaterials by the easily-handled dopant molecules.

リンク情報
DOI
https://doi.org/10.1002/open.201900169
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85069968071&origin=inward 本文へのリンクあり
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ID情報
  • DOI : 10.1002/open.201900169
  • eISSN : 2191-1363
  • SCOPUS ID : 85069968071

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