Acta Phys. -Chim. Sin. ›› 2009, Vol. 25 ›› Issue (07): 1405-1408.doi: 10.3866/PKU.WHXB20090731

• ARTICLE • Previous Articles     Next Articles

Facile Synthesis and Formation Mechanism of Silver Nanoplates with Edge Lengths of Several Micrometers

DUAN Jun-Yuan, ZHANG Qiao-Xin, WANG Yi-Long, GUAN Jian-Guo   

  1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China
  • Received:2009-03-02 Revised:2009-04-14 Published:2009-06-26
  • Contact: GUAN Jian-Guo E-mail:guanjg@whut.edu.cn

Abstract:

We developed a low temperature solvothermal approach to synthesize single crystal silver nanoplates with edge lengths of 1-4 μm, thicknesses of 50-100 nm and aspect ratios ≥10 in a large-scale. In this solvothermal approach, N,N-dimethyllformamide (DMF) was used as a main reducing agent and as a solvent, polyvinylpyrrolidone (PVP) was used as a supplementary reducing agent and capping agent, and silver nitrates were used as precursors. The as-obtained silver products of high-purity were characterized by powder X-ray diffraction (PXRD), field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). We investigated the impact of different solvents on the morphologies of these silver nanostructures and proposed a possible growth mechanism for the as-synthesized silver nanoplates with large edge lengths and high aspect ratios. The current work provides a new reliable kinetic approach to tune the edge lengths and aspect ratios of silver nanoplates. The as-obtained silver nanoplates with large edge lengths and high aspect ratios have potential important application in polymer-based conductive composites and electromagnetic shielding materials.

Key words: Nanocrystal, N,N-dimethyllformamide, Polyvinylpyrrolidone, Silver nanoplates, Conductive composite

MSC2000: 

  • O642