論文

査読有り 国際誌
2020年4月14日

Monovalent sulfur oxoanions enable millimeter-long single-crystalline h-WO3 nanowire synthesis.

Nanoscale
  • Guozhu Zhang
  • Chen Wang
  • Wataru Mizukami
  • Takuro Hosomi
  • Kazuki Nagashima
  • Hideto Yoshida
  • Kentaro Nakamura
  • Tsunaki Takahashi
  • Masaki Kanai
  • Takao Yasui
  • Yuriko Aoki
  • Yoshinobu Baba
  • Takeshi Yanagida
  • 全て表示

記述言語
英語
掲載種別
DOI
10.1039/c9nr10565d

Here, we discuss a misunderstanding regarding chemical capping, which has intrinsically hindered the extension of the length of hexagonal (h)-WO3 nanowires in previous studies. Although divalent sulfate ions (SO42-) have been strongly believed to be efficient capping ions for directing anisotropic h-WO3 nanowire growth, we have found that the presence of SO42- is highly detrimental to the anisotropic crystal growth of the h-WO3 nanowires, and a monovalent sulfur oxoanion (HSO4-) rather than SO42- only substantially promotes the anisotropic h-WO3 nanowire growth. Ab initio electronic structure simulations revealed that the monovalent sulfur oxoanions were preferentially able to cap the sidewall plane (100) of the h-WO3 nanowires due to the lower hydration energy when compared with SO42-. Based on this capping strategy, using the monovalent sulfur oxoanion (CH3SO3-), which cannot generate divalent sulfur oxoanions, we have successfully fabricated ultra-long h-WO3 nanowires up to the millimeter range (1.2 mm) for a wider range of precursor concentrations. We have demonstrated the feasibility of these millimeter-long h-WO3 nanowires for the electrical sensing of molecules (lung cancer biomarker: nonanal) on flexible substrates, which can be operated at room temperature with mechanical flexibility with bending cycles up to 104 times due to the enhanced textile effect.

リンク情報
DOI
https://doi.org/10.1039/c9nr10565d
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/32285063
ID情報
  • DOI : 10.1039/c9nr10565d
  • PubMed ID : 32285063

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