An anisotropic snowflake-like structural assembly of polymer-capped gold nanoparticles

Harshala Parab, Cheulhee Jung, Min Ah Woo, Hyun Gyu Park

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

Snowflake-like structural assembly of isotropic gold nanoparticles (GNPs) is reported. A modified polyamine method has been employed to synthesize positively charged GNPs in presence of a polymeric metaphosphate. This process yields fascinating dendritic self-assembled morphologies. Structural characterization revealed that there was aggregation of crystalline GNPs. The aggregates of GNPs formed in the initial stage of synthesis are assumed to act as the bulging seeds for final growth of complex morphologies at nanometer to micrometer length scale. Self-assembly of GNPs was found to be greatly influenced by the concentration of gold precursor. Diffusion limited aggregation of GNPs is suggested as the plausible mechanism for this nanoparticle selforganization process.

Original languageEnglish
Pages (from-to)2173-2180
Number of pages8
JournalJournal of Nanoparticle Research
Volume13
Issue number5
DOIs
Publication statusPublished - 2011 May
Externally publishedYes

Bibliographical note

Funding Information:
Acknowledgments Financial support for this investigation was provided by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (MOST, No. 2009-008-0602 & No. R01-2007-000-11851-0) and the Brain Korea 21 (BK21) program.

Keywords

  • Anisotropic
  • Dendrimers
  • Gold nanoparticles
  • Polyamine
  • Self-assembly
  • Snowflake-like
  • Synthesis

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • Atomic and Molecular Physics, and Optics
  • Modelling and Simulation
  • General Materials Science
  • Condensed Matter Physics

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