共 33 条
Monitoring the aspect ratio distribution of colloidal gold nanoparticles under pulsed-laser exposure
被引:5
作者:

Mansour, Yehia
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机构:
Univ Lorraine, LCP A2MC, F-57000 Metz, France Univ Lorraine, LCP A2MC, F-57000 Metz, France

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Naciri, Aotmane En
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机构:
Univ Lorraine, LCP A2MC, F-57000 Metz, France Univ Lorraine, LCP A2MC, F-57000 Metz, France

Chaoui, Nouari
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机构:
Univ Lorraine, LCP A2MC, F-57000 Metz, France Univ Lorraine, LCP A2MC, F-57000 Metz, France
机构:
[1] Univ Lorraine, LCP A2MC, F-57000 Metz, France
关键词:
Gold nanoparticles - Aspect ratio - Laser theory - Pulsed lasers;
D O I:
10.1364/OE.399831
中图分类号:
O43 [光学];
学科分类号:
070207 ;
0803 ;
摘要:
We propose an advanced in situ extinction spectroscopy set up to investigate the dynamic of the fragmentation and reshaping processes of gold colloids during a ns-laser pulse exposure. The evolution of the aspect ratio distribution of gold nanorods (NRs) during the laser exposure is obtained by analyzing each spectra with the shape distributed effective medium theory. We demonstrate that the kinetics of NR shape transformation can be divided into two fluence regimes. At small fluence, the kinetic is limited by the NRs orientation, while at high fluence, the fragmentation rate is only limited by the probability of NRs to be located in the irradiated volume. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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页码:34501 / 34515
页数:15
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Battie, Yann
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