Stepwise growth of decahedral and icosahedral silver nanocrystals in DMF

Masaharu Tsuji, Masatoshi Ogino, Ryoichi Matsuo, Hisayo Kumagae, Sachie Hikino, Taegon Kim, Seong Ho Yoon

Research output: Contribution to journalArticlepeer-review

78 Citations (Scopus)

Abstract

Silver nanocrystals were synthesized by reducing AgNO3 in N,N-dimethylformamide (DMF) solution. Besides decahedral and icosahedral nanoparticles, a series of their intermediate particles, which consist of a combination of two and more tetrahedra, are obtained. It was found that decahedral and icosahedral nanoparticles are not formed through assembling of tetrahedra formed separately but produced through the stepwise growth of tetrahedral units on specific facets in DMF. A simple combination model, of tetrahedral units suggested that the growth position of the fourth tetrahedral unit determines whether a decahedron or icosahedron is finally produced. In the formation of icosahedron, the crystal growth occurs inside of decahedral units. No further growth from decahedron to icosahedron was observed, indicating that there is a large energy barrier for the addition of a tetrahedron unit to a decahedron. Our study gives new information on the stepwise growth mechanism of decahedra and icosahedra in DMF solution.

Original languageEnglish
Pages (from-to)296-301
Number of pages6
JournalCrystal Growth and Design
Volume10
Issue number1
DOIs
Publication statusPublished - Jan 6 2010

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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