<i>In-Situ</i> Observation for Formations of Gold Micrometer-Sized Particles in Liquid Phase Using Atmospheric Scanning Electron Microscopy (ASEM)

• Matsuno Yasunari

  Graduate School of Engineering, Chiba University

• Okonogi Eri

  Graduate School of Engineering, Chiba University

• Yoshimura Akihiro

  Institute of Industrial Science, The University of Tokyo

• Sato Mari

  Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology

• Sato Chikara

  Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology

Bibliographic Information

Other Title

• In-Situ Observation for Formations of Gold Micrometer-Sized Particles in Liquid Phase Using Atmospheric Scanning Electron Microscopy (ASEM)

Abstract

In this report, we present a novel method to produce micrometer-sized gold particles by dissolving and recovering gold from a dimethyl sulfoxide/hydrochloric acid (DMSO/HCl) solution containing copper (II) chloride (CuCl₂) and sodium chloride (NaCl). It was reported that spherical or confeito-like particles can be formed depending on the concentrations of dissolved gold and Cl⁻ ions in the solution. In this paper, in-situ observation of gold particle formation in the solution phase was conducted using atmospheric scanning electron microscopy (ASEM). An electron-permeable window made of a pressure-resistant silicon nitride (Si₃N₄) film (100 nm-thick), was set at the bottom of the open ASEM sample dish, which facilitated the projection of electron beams from underneath the sample. This structure of ASEM enabled us to observe dynamic phenomena in liquid or gas phase under atmospheric pressure in real time. It was found during the in-situ observation that all of the particles formed were confeito-like in shape, which was different from the expected particle morphology.   This Paper was Originally Published in Japanese in J. Japan Inst. Met. Mater. 81 (2017) 192–195.

Journal

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 59 (1), 146-149, 2018

  The Japan Institute of Metals and Materials

Keywords

• atmospheric scanning electron microscopy (ASEM)
• gold
• in-situ observation
• particle formation

Details

• CRID: 1390282679228873472
• NII Article ID: 130006279179
• NII Book ID: AA1151294X
• DOI: 10.2320/matertrans.m2017259
• ISSN: 13475320
• ISSN: 13459678
• NDL BIB ID: 028739860
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I028739860
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/59/1/59_M2017259/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed