Textile Coloration and Finishing (한국염색가공학회지)

The Korean Society of Dyers and Finishers (한국염색가공학회)
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Fabrication of Size- and Shape- Controlled Gold Particles using Wet Chemical Process

환원 석출법을 이용한 모양과 크기가 제어된 금 입자의 제조

  • Hong, So-Ya (Department of Organic Materials and Fiber Engineering, Soongsil University) ;
  • Lee, Chang-Hwan (Department of Organic Materials and Fiber Engineering, Soongsil University) ;
  • Kim, Joo-Yong (Department of Organic Materials and Fiber Engineering, Soongsil University)
  • 홍소야 (숭실대학교 유기 신소재.파이버 공학과) ;
  • 이창환 (숭실대학교 유기 신소재.파이버 공학과) ;
  • 김주용 (숭실대학교 유기 신소재.파이버 공학과)
  • Received : 2010.02.24
  • Accepted : 2010.04.27
  • Published : 2010.06.27
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Abstract

Shape and size controlled synthesis of gold particles has been studied by using wet-chemical method. When ${AuCl_4}^-$ in aqueous $HAuCl_4$ precursor was reduced using $Na_2SO_3$ as a reducing agent, mixtures of spherical, triangular and hexagonal particles were prepared in a few minutes. It was found that the shape selective oxidative etching by ${AuCl_4}^-\;+\;Cl^-$ anions and crystal growth took place simultaneously. As the ${AuCl_4}^-$ and $Cl^-$ concentration increased, yields of large triangular and hexagonal plate type particles increased, while the spherical particles decreased in most cases. Possible etching and growth mechanisms are discussed.

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References

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