Elongation of gold nanoparticles in silica glass by irradiation with swift heavy ions
Author(s) -
Koichi Awazu,
Xiaomin Wang,
Makoto Fujimaki,
Junji Tominaga,
Hirohiko Aiba,
Yoshimichi Ohki,
T. Komatsubara
Publication year - 2008
Publication title -
physical review b
Language(s) - English
Resource type - Journals
eISSN - 1538-4489
pISSN - 1098-0121
DOI - 10.1103/physrevb.78.054102
Subject(s) - swift heavy ion , elongation , colloidal gold , materials science , irradiation , nanoparticle , ion , radius , silica glass , chemical engineering , nanotechnology , composite material , fluence , ultimate tensile strength , chemistry , nuclear physics , physics , computer security , organic chemistry , computer science , engineering
We examined the mechanism whereby nanoparticles of gold embedded in silica become elongated and oriented parallel to each other on ion irradiation. Elongation occurred for gold particles with radii smaller than 25 nm. The process was simulated by using a thermal spike model. For small-radius nanoparticles, ion irradiation raises the temperature above the melting points of both gold and silica, whereas for larger nanoparticles neither the gold nanoparticle nor the surrounding silica matrix is melted
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