Structure of gold nanoparticles suspended in water studied by x-ray diffraction and computer simulations

Valeri Petkov, Yong Peng, Geoff Williams, Baohua Huang, Donald Tomalia, Yang Ren

Research output: Contribution to journalArticlepeer-review

105 Scopus citations

Abstract

Gold nanoparticles with an average size of 3 nm, 15 nm, and 30 nm suspended in water have been studied by x-ray diffraction and computer simulations. The atomic pair distribution function approach was employed to determine the three-dimensional structure because of the limited structural coherence in these nanostructured materials. The nanoparticles possess a well-defined atomic arrangement resembling the face-centered cubic (fcc) structure occurring with bulk gold. The fcc-type features of this arrangement become more prominent with increasing nanoparticle size. The study provides a clear picture of the nanoparticles' size-structure relationship and can help open up the route for calculating and predicting of their useful properties.

Original languageEnglish
Article number195402
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume72
Issue number19
DOIs
StatePublished - Nov 15 2005

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