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Pure and Applied Chemistry

The Scientific Journal of IUPAC

Ed. by Burrows, Hugh / Stohner, Jürgen

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Volume 72, Issue 1-2

Issues

Phototransformation of Alkanethiol-derivatized Noble Metal Nanoparticle

Chil Seong Ah
  • Corresponding author
  • School of Chemistry and Center for Molecular Catalysis, Seoul National University, Seoul 151-742, Korea
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Hyouk Soo Han
  • Corresponding author
  • School of Chemistry and Center for Molecular Catalysis, Seoul National University, Seoul 151-742, Korea
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Kwan Kim
  • Corresponding author
  • School of Chemistry and Center for Molecular Catalysis, Seoul National University, Seoul 151-742, Korea
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Du-Jeon Jang
  • Corresponding author
  • School of Chemistry and Center for Molecular Catalysis, Seoul National University, Seoul 151-742, Korea
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2009-01-01 | DOI: https://doi.org/10.1351/pac200072010091

Photon-initiated shape transformation of n-alkanethiol-derivatized noble metal nanoparticles has been studied with variations of metal, alkanethiol, and solvent. Silver nanoparticles undergo fragmentation upon irradiation while gold ones barely do. Silver/gold composite particles follow the case of silver with a reduced efficiency. The efficiency decreases as alkanethiol length or solvent dipole moment increases. Following the conduction of thermalized photon energy, alkanethiol can dissociate in a period of heat dissipation, and some of dethiolated particles fragment within the recombination time. Prior to the thermal conduction, shape transformation via melt and vaporization also occurs for both metals but this effect is less apparent for silver because of more notable fragmentation followed. The difference in the transformation of two metals is ascribed to the differences in work function, oxidation potential, atomization enthalpy, and particle size. Smaller fragmentation efficiency with more polar solvent or longer alkanethiol is attributed mainly to relatively smaller dissociation rate compared with heat dissipation rate.

Conference

Workshop on Advanced Material (WAM1: Nanostructured Systems), Workshop on Advanced Materials, WAM, Advanced Materials, Hong Kong, China, 1999-07-14–1999-07-18

About the article

Published Online: 2009-01-01

Published in Print: 2000-01-01


Citation Information: Pure and Applied Chemistry, Volume 72, Issue 1-2, Pages 91–99, ISSN (Online) 1365-3075, ISSN (Print) 0033-4545, DOI: https://doi.org/10.1351/pac200072010091.

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