Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Characterization and Stability of Silver Nanoparticles in Aqueous Solutions

  • Bac, L.H. (School of Materials Science Engineering, University of Ulsan) ;
  • Gu, W.H. (School of Materials Science Engineering, University of Ulsan) ;
  • Kim, J.C. (School of Materials Science Engineering, University of Ulsan) ;
  • Kim, B.K. (School of Materials Science Engineering, University of Ulsan) ;
  • Kim, J.S. (School of Materials Science Engineering, University of Ulsan)
  • Received : 2012.01.13
  • Accepted : 2012.02.08
  • Published : 2012.02.28
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Abstract

In this work, the silver nanoparticles have been synthesized by electrical explosion of wire in three liquid mediums: deionized water (DIW), polyvinylpyrrolidone (PVP) and sodium dodecyl benzene sulfonate (SDBS) solutions. Absorption in the UV-visible region of these suspensions was measured in the range of 300-800 nm. A surface plasmon peak was observed at ~400 nm in all suspensions in measured wavelength range. Particle size was analyzed by transmission electron microscope. It showed that the particles had nearly spherical shape in all samples. The average particle sizes prepared in DIW, PVP and SDBS solution were 37, 31 and 27 nm, respectively. Stability of the suspensions was estimated by multiple light scattering method. The presence of PVP and SDBS surfactants in the exploding medium resulted in enhanced stability of the silver suspensions.

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