Quantitative optical trapping of single gold nanorods
Quantitative optical trapping of single gold nanorods
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DOI：
10.1021/nl802053h
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发表时间：
2008-09-01
期刊：
影响因子：
10.8
通讯作者：
Oddershede, Lene B.
中科院分区：
文献类型：
--
作者：
Selhuber-Unkel, Christine;Zins, Inga;Oddershede, Lene B.
我们报告了作用于光学捕获的单金纳米棒上的力的定量分析。使用超过其等离子体共振波长的激光波长，将直径在 8 至 44 nm 之间、纵横比在 1.7 至 5.6 之间的单个纳米棒稳定地捕获在三个维度中。光陷阱的电磁场和单个金纳米棒之间的相互作用与粒子极化率相关，极化率是粒子体积和纵横比的函数。
We report a quantitative analysis of the forces acting on optically trapped single gold nanorods. Individual nanorods with diameters between 8 and 44 nm and aspect ratios between 1.7 and 5.6 were stably trapped in three dimensions using a laser wavelength exceeding their plasmon resonance wavelengths. The interaction between the electromagnetic field of an optical trap and a single gold nanorod correlated with particle polarizability, which is a function of both particle volume and aspect ratio.