Hot-wire synthesis of gold nanoparticles

Adam M. Boies, Pingyan Lei, Steven Calder, Weon Gyu Shin, Steven L. Girshick

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Gold nanoparticles were synthesized by a hot-wire generator at atmospheric pressure using a gold-platinum composite wire. At low gas flow velocities the nanoparticles were found to be agglomerates of partially sintered primary particles. By reducing the tube size via the insertion of a nozzle with a throat diameter of 3 mm, the hot-wire generator was found to produce small (10 nm diameter) crystalline gold particles. Elemental and x-ray photoelectron spectroscopy analysis of the particles showed that they were composed of gold with no platinum impurity. Charging analysis of the as-produced nanoparticles showed that fewer than 10% of the particles were charged, but the charge fraction increased as the applied power increased, as did the ratio of negatively-to-positively-charged particles.

Original languageEnglish (US)
Pages (from-to)654-663
Number of pages10
JournalAerosol Science and Technology
Volume45
Issue number5
DOIs
StatePublished - May 1 2011

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