Rotation of Cu nanorods during growth

J. X. Fu; J. S. Wu; Y. P. Zhao

doi:10.1021/jp711970x

Rotation of Cu nanorods during growth

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

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-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 language	English (US)
Pages (from-to)	5459-5462
Number of pages	4
Journal	Journal of Physical Chemistry C
Volume	112
Issue number	14
DOIs	https://doi.org/10.1021/jp711970x
State	Published - Apr 10 2008

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
General Energy
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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title = "Rotation of Cu nanorods during growth",

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.",

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T1 - Rotation of Cu nanorods during growth

AU - Fu, J. X.

AU - Wu, J. S.

AU - Zhao, Y. P.

PY - 2008/4/10

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N2 - 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.

AB - 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.

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Rotation of Cu nanorods during growth

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