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Manipulation of gold nanorods with dual-optical tweezers for surface plasmon resonance control

机译:用双光镊操纵金纳米棒以控制表面等离子体共振

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摘要

Gold nanorods are too tiny to be manipulated using conventional mechanical methods. In this paper, we demonstrate the trapping, transferring, positioning and patterning of gold nanorods with dual-optical tweezers. The convenient manipulations are achieved by taking advantage of the longitudinal surface plasmon resonance of gold nanorods and the anisotropic optical trapping forces formed by two linearly polarized Gaussian beams. The trapped gold nanoparticles are positioned extremely firmly and quickly on a substrate compared with randomly dispersed ones. It is observed that gold nanorods show advantages over gold nanospheres with regard to positioning speed and stability. More importantly, versatile plasmon coupling effects have been achieved in some patterned nanorods.
机译:金纳米棒太小,无法使用常规机械方法进行操作。在本文中,我们用双光镊子演示了金纳米棒的捕获,转移,定位和图案化。利用金纳米棒的纵向表面等离子体激元共振和由两个线性极化的高斯光束形成的各向异性光学捕获力,可以实现便捷的操作。与随机分散的金纳米粒子相比,捕获的金纳米粒子非常牢固且快速地放置在基板上。观察到金纳米棒在定位速度和稳定性方面显示出优于金纳米球的优势。更重要的是,在某些图案化的纳米棒中已经实现了通用的等离激元耦合效应。

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