Rayleigh Instability and Surfactant-Mediated Stabilization of Ultrathin Gold Nanorods
Rayleigh Instability and Surfactant-Mediated Stabilization of Ultrathin Gold Nanorods
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DOI：
10.1021/acs.jpcc.6b03113
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发表时间：
2016-07
影响因子：
3.7
通讯作者：
Ryo Takahata;S. Yamazoe;Chompunuch Warakulwit;J. Limtrakul;T. Tsukuda
中科院分区：
文献类型：
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作者：
Ryo Takahata;S. Yamazoe;Chompunuch Warakulwit;J. Limtrakul;T. Tsukuda
油胺（OA）稳定的超薄金纳米棒（AuUNRs;直径约为2nm）分散在含有少量OA的氯仿中时被球化。时间分辨光谱和透射电镜分析表明，由于瑞利不稳定性，随着小Au纳米球（AuNS）的释放，AuUNR逐渐缩短，随后转变为等离子体AuNS（直径>2 nm）。OA表面活性剂通过抑制Au表面原子的扩散，在稳定AuUNRs的形貌方面起着至关重要的作用。
Ultrathin gold nanorods (AuUNRs; diameter ∼2 nm) stabilized by oleylamine (OA) were spheroidized when dispersed in chloroform containing a small amount of OA. Time-resolved optical spectroscopy and TEM analysis indicated that the AuUNRs were gradually shortened with the release of small Au nanospheres (AuNSs) because of Rayleigh instability, followed by transformation into plasmonic AuNSs (diameter >2 nm). The OA surfactants play an essential role in stabilizing the morphology of AuUNRs by suppressing the diffusion of Au surface atoms.