微通道内远场等离子体共振增强纳米粒子图像测速
Far-Field Plasmonic Resonance Enhanced Nano-Particle Image Velocimetry within a Micro Channel
摘要：
在本文中，一种新型的远场等离子体共振增强纳米粒子种子粒子图像测速（nPIV）已被证明是测量微通道中的速度分布。化学合成的银纳米粒子已被用于在微通道中的种子流。采用离散偶极近似（DDA）方法，计算了直径为15 ~ 200 nm的球形银纳米粒子的等离子体共振增强光散射。确定了纳米粒子在水和空气两种介质中的最佳散射波长。记录并分析了不同直径银纳米粒子的衍射极限等离子体共振增强图像。通过使用标准的PIV技术，已确定的微通道内的速度分布从图像。
英文摘要：
In this paper, a novel far-field plasmonic resonance enhanced nanoparticle-seeded Particle Image Velocimetry (nPIV) has been demonstrated to measure the velocity profile in a micro channel. Chemically synthesized silver nanoparticles have been used to seed the flow in the micro channel. By using Discrete Dipole Approximation (DDA), plasmonic resonance enhanced light scattering has been calculated for spherical silver nanoparticles with diameters ranging from 15nm to 200nm. Optimum scattering wavelength is specified for the nanoparticles in two media: water and air. The diffraction-limited plasmonic resonance enhanced images of silver nanoparticles at different diameters have been recorded and analyzed. By using standard PIV techniques, the velocity profile within the micro channel has been determined from the images.
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