Asynchronous melting of embedded metal nanoparticles and silica matrix for shape elongation induced by swift heavy ion irradiation

Amekura, Hiroshi*; Ishikawa, Norito ; Okubo, Nariaki ; Nakayama, Yoshiko*; Mitsuishi, Kazuki*

Although the mechanism of shape-elongation of nanoparticles (NPs) by swift-heavy-ion-irradiation is still under debate, melting and solidification for pico-seconds of NPs by thermal spikes has been proposed as one of the processes involved. Elongation of high melting point (MP) NPs (vanadium, $_{rm MP}^{rm bulk}$ = 1890 $^{circ}$ C) and of low MP NPs (zinc, $_{rm MP}^{rm bulk}$ = 420 $^{circ}$ C) were compared under irradiation with 200 MeV Xe $^{14+}$ ions. Irrespective of the large difference in their MPs, both the V and Zn NPs showed comparable elongation. The insensitivity of elongation to the MP can be explained by the asynchronicity of melting of the silica and the NPs.

Language	:	English
Journal	:	Nuclear Instruments and Methods in Physics Research B
Volume	:	269
Number	:	23
Pages	:	p.2730 - 2733
Publication Year/Month	:	2011/12
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Patent information	:
PDF	:
Paper URL	:	https://doi.org/10.1016/j.nimb.2011.08.011
DOI for research data	:
Keywords	:	no keyword
Research Facility	:	タンデム加速器
Press Release	:
Article of JAEA R&D Review	:
Cooperating Institute	:	物質・材料研究機構

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Registration No. : AA20110374
JAEA Abstracts No. :
Paper Submission No. : 11750

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