Laser Biomedical Applications and Instrumentations Division, Raja Ramanna Centre for Advanced Technology, Indore, India.
Opt Lett. 2013 Aug 1;38(15):2855-7. doi: 10.1364/OL.38.002855.
We report results of studies on the effect of different shapes and sizes of gold nanoparticles (GNPs) on the depolarization characteristics of Intralipid tissue phantoms. For a given extinction coefficient, the absorption characteristics of the GNPs contributed more to the depolarization of the turbid medium, and the contribution of scattering was significant only for the larger-sized particles. For rod-shaped GNPs, their depolarization plays an important role in the low scattering regime in which the depolarization properties of the nanoparticles (NPs) dominate in the turbid medium even if the contribution of the scattering from the NPs is about an order of magnitude less. For highly scattering samples, GNP absorption significantly modulates the depolarization spectra of the turbid medium.
我们报告了不同形状和大小的金纳米粒子（GNPs）对 Intralipid 组织模拟物去极化特性影响的研究结果。对于给定的消光系数，GNPs 的吸收特性对浊度介质的去极化贡献更大，而散射的贡献仅对较大尺寸的颗粒显著。对于棒状 GNPs，它们的去极化在低散射区域起着重要作用，在该区域中，即使 NPs 的散射贡献大约低一个数量级，纳米颗粒（NPs）的去极化特性仍主导着浊度介质。对于高度散射的样品，GNP 吸收显著调节了浊度介质的去极化光谱。
