Invited Article: Optical trapping of ultrasmooth gold nanoparticles in liquid and air
Invited Article: Optical trapping of ultrasmooth gold nanoparticles in liquid and air
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DOI：
10.1063/1.5030404
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发表时间：
2018-07-01
期刊：
影响因子：
5.6
通讯作者：
Dholakia, K.
中科院分区：
文献类型：
--
作者：
Arita, Y.;Tkachenko, G.;Dholakia, K.
金纳米粒子的光学操纵已经成为一个令人兴奋的途径，在纳米测温，细胞穿孔，光学结合，和光学力学的研究。然而，传统的金纳米粒子通常偏离球形，使得这种研究控制较少，并导致捕获行为中的潜在伪像。我们合成了超光滑的金纳米粒子，它提供了改进的圆形和单分散性。在这篇文章中，我们通过一系列在液体和空气中的光捕获实验来证明这种纳米颗粒的优点。与传统的对应物相比，超光滑的金纳米粒子表现出高达2倍和10倍的标准偏差减少陷阱的刚度测量在液体和空气中，分别。它们将使等离子体介导的光-物质相互作用的更多控制研究成为可能。(C)2018年作者。
Optical manipulation of gold nanoparticles has emerged as an exciting avenue for studies in nanothermometry, cell poration, optical binding, and optomechanics. However, conventional gold nanoparticles usually depart from a spherical shape, making such studies less controlled and leading to potential artifacts in trapping behavior. We synthesize ultrasmooth gold nanoparticles, which offer improved circularity and monodispersity. In this article, we demonstrate the advantages of such nanoparticles through a series of optical trapping experiments in both liquid and air. Compared to their conventional counterparts, ultrasmooth gold nanoparticles exhibit up to a two-fold and ten-fold reduction in standard deviation for trap stiffness measurements in liquid and air, respectively. They will enable more controlled studies of plasmon mediated light-matter interactions. (C) 2018 Author(s).