articleChemistry of MaterialsOct 8, 2002Closed access

Uniform Silver Nanowires Synthesis by Reducing AgNO 3 with Ethylene Glycol in the Presence of Seeds and Poly(Vinyl Pyrrolidone)

YSYugang SunYYYadong YinBTBrian T. MayersTHThurston HerricksYXYounan Xia

University of Washington

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Abstract

A solution-phase approach has been demonstrated for the large-scale synthesis of silver nanowires with diameters in the range of 30−40 nm, and lengths up to ∼50 μm. The first step of this process involved the formation of Pt (or Ag) nanoparticles by reducing PtCl2 (or AgNO3) with ethylene glycol (EG) heated to ∼160 °C. These Pt (or Ag) nanoparticles could serve as seeds for the heterogeneous nucleation and growth of silver (formed by reducing AgNO3 with EG) because of their close match in crystal structure and lattice constants. In the presence of poly(vinyl pyrrolidone) (PVP), the growth of silver could be directed into a highly anisotropic mode to form uniform nanowires with aspect ratios as high as ∼1000.…

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Topics & keywords

Topics
Keywords
  • Ethylene glycol
  • Silver nitrate
  • Materials science
  • Silver nanoparticle
  • Nanowire
  • Nucleation
  • Chemical engineering
  • Nanorod
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