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

27 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 2011

Bibliographical note

Funding Information:
This research was primarily supported by the National Science Foundation under Award Number CBET-0730184, and partially supported by the MRSEC Program of the NSF under Award Number DMR-0819885, and by Minnesota Futures Grant Program. Parts of this work were carried out in the College of Science and Engineering Characterization Facility, University of Minnesota, which receives partial support from NSF through the MRSEC program.

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