Rotation of Cu nanorods during growth

J. X. Fu, J. S. Wu, Y. P. Zhao*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

The dynamic growth of Cu nanoparticles at high temperatures was observed in situ by a transmission electron microscope. During growth, Cu nanorods are formed and their aspect ratio increases from 1.24 to 4.59 with growth time and temperature (T ≤ 920 °C). With further temperature increasing (at T = 960 °C), all the particles become a spherical shape. Most Cu nanorods formed during growth rotate nearly monotonically around a fixed axis, and their instantaneous rotation speed follows a Gaussian distribution. The variation of the rotation speed is 3 × 10-3 rad/s at T = 800 °C and 1.7 × 10-3 rad/s at T = 920 °C, which infers a more active rotation at lower temperature. This phenomenon is believed to be caused by the difference in Cu adatom concentrations around the Cu nanorods during growth.

Original languageEnglish (US)
Pages (from-to)5459-5462
Number of pages4
JournalJournal of Physical Chemistry C
Volume112
Issue number14
DOIs
StatePublished - Apr 10 2008

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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