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Author Notes:

E-mail address: younan.xia@bme.gatech.edu.

Subjects:

Research Funding:

The work was partially supported by the NSF (DMR, 1104614 and 1215034), the NIH (NCI, R01 CA13852701), a NIH Director’s Pioneer Award (DP1 OD000798), and startup funds from Georgia Institute of Technology.

X.X. and Q.Z. were also partially supported by Fellowships from the China Scholarship Council.

Keywords:

  • Science & Technology
  • Physical Sciences
  • Technology
  • Chemistry, Physical
  • Nanoscience & Nanotechnology
  • Materials Science, Multidisciplinary
  • Chemistry
  • Science & Technology - Other Topics
  • Materials Science
  • SURFACE-PLASMON RESONANCE
  • ENHANCED RAMAN-SCATTERING
  • SEED-MEDIATED SYNTHESIS
  • WET CHEMICAL SYNTHESIS
  • HIGH-ASPECT-RATIO
  • OPTICAL-PROPERTIES
  • METAL NANOCRYSTALS
  • POLY(VINYL PYRROLIDONE)
  • QUANTITATIVE-ANALYSIS
  • CONCAVE SURFACES

Recent Developments in Shape-Controlled Synthesis of Silver Nanocrystals

Tools:

Journal Title:

Journal of Physical Chemistry C

Volume:

Volume 116, Number 41

Publisher:

, Pages 21647-21656

Type of Work:

Article | Post-print: After Peer Review

Abstract:

This feature article introduces our recent work on understanding the roles played by citrate and poly(vinyl pyrrolidone) (PVP) as capping agents in seed-mediated syntheses of Ag nanocrystals with controlled shapes. We have demonstrated that citrate and PVP selectively bind to Ag(111) and Ag(100) surfaces, respectively, and thus favor the formation of Ag nanocrystals enclosed preferentially by {111} or {100} facets. In addition, we have quantified the coverage density of PVP adsorbed on the surface of Ag nanocubes. On the basis of the mechanistic understanding, a series of Ag nanocrystals with controlled shapes and sizes have been successfully synthesized by using different combinations of seeds and capping agents: single-crystal spherical/cubic seeds with citrate for cuboctahedrons and octahedrons or with PVP for cubes and bars and plate-like seeds with citrate for enlarged thin plates or with PVP for thickened plates.

Copyright information:

© 2012 American Chemical Society.

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