Trace oxygen effects on copper nanoparticle size and morphology

D. L. Olynick, J. M. Gibson, Robert S Averback

Research output: Contribution to journalArticlepeer-review

Abstract

Using an ultrahigh vacuum (UHV) magnetron sputtering system connected directly to a UHV transmission electron microscope (TEM), we study, in situ, the effect of trace levels of oxygen contamination on the early stages of sintering, coalescence, and morphology. Whereas, nanoparticles produced under clean conditions experience substantial sintering and grain growth upon contact, even at room temperature, particles deliberately exposed to trace amounts of oxygen remain distinct. It therefore appears difficult to form ultraclean nanophase materials, at least for copper, due to rapid sintering. These systematic studies of particle morphology as a function of oxygen exposure shed light on nanoparticle growth mechanisms in the gas phase and thus ways to approach the ideal nanophase material.

Original languageEnglish (US)
Pages (from-to)343-345
Number of pages3
JournalApplied Physics Letters
Volume68
Issue number3
DOIs
StatePublished - 1996

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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