<i>In Situ</i> Observation of Gold Chloride Decomposition in a Confined Nanospace by Transmission Electron Microscopy

• Kobayashi Keita

  Department of Chemistry, Nagoya University

• Kitaura Ryo

  Department of Chemistry, Nagoya University

• Sasaki Katsuhiro

  Department of Quantum Engineering, Nagoya University

• Kuroda Kotaro

  Department of Quantum Engineering, Nagoya University

• Saito Takeshi

  Nanotube Research Center, National Institute of Advanced Industrial Science and Technology (AIST)

• Shinohara Hisanori

  Department of Chemistry, Nagoya University Institute for Advanced Research, Nagoya University

Bibliographic Information

Other Title

• In Situ Observation of Gold Chloride Decomposition in a Confined Nanospace by Transmission Electron Microscopy

Abstract

The behavior of gold chloride (AuCl_x) encapsulated within the inner space of a single-wall carbon nanotube (SWCNT) was investigated under electron beam (e-beam) irradiation and high temperatures. Analysis of the pristine specimen by transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), and Raman spectroscopy show that AuCl_x is encapsulated within the SWCNTs as a dilute disordered structure. In situ TEM observation of the specimen under e-beam irradiation shows that, within the SWCNTs, AuCl_x is reduced to a crystalline Au nanowire (AuNW). The AuNW drifts significantly within the SWCNT during the reduction. At high temperatures (>673 K), in situ TEM shows that the AuNW oscillates intermittently at a frequency of ∼1.1 s⁻¹ and amplitude of ∼60 nm. Raman spectroscopy and EDX suggest that these phenomena are caused by an increase in the internal gas pressure in the SWCNTs because the decomposition of AuCl_x by e-beam irradiation or heat treatment produced chlorine (Cl₂) gas.

Journal

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 55 (3), 461-465, 2014

  The Japan Institute of Metals and Materials

Keywords

• carbon nanotubes
• transmission electron microscopy
• <i>in situ</i> observation
• electron beam irradiation
• gold chloride

Details

• CRID: 1390282679229232384
• NII Article ID: 40020002845
• NII Article ID: 130004455274
• NII Book ID: AA1151294X
• DOI: 10.2320/matertrans.md201308
• ISSN: 13475320
• ISSN: 13459678
• NDL BIB ID: 025313764
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I025313764
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/55/3/55_MD201308/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed