非独立散射对纳米颗粒介质光热效应的影响

发布时间：2018-01-08 15:25

本文关键词：非独立散射对纳米颗粒介质光热效应的影响　出处：《光散射学报》2017年02期 　论文类型：期刊论文

【摘要】：本文采用有限元软件COMSOL结合双温度模型模拟了含金纳米颗粒复合介质的光热效应和温度分布,分析了金纳米颗粒非独立散射的影响,讨论了发生光热效应时复合介质内能量的传递方式。结果表明:将双温度模型与Fourier导热定律结合可以描述纳米颗粒及周围介质的温度变化;与独立散射的颗粒相比,非独立散射情况下光热效应与颗粒间的耦合现象有关,并且这种耦合效应与颗粒间的距离相关。
[Abstract]:In this paper, the photothermal effect and temperature distribution of the composite medium containing gold nanoparticles are simulated by the finite element software COMSOL and double temperature model, and the influence of non-independent scattering of gold nanoparticles is analyzed. The energy transfer mode in the composite medium during photothermal effect is discussed. The results show that the temperature change of nanoparticles and surrounding media can be described by combining the double temperature model with the Fourier heat conduction law. Compared with the independent scattering particles, the photothermal effect is related to the coupling between particles in the case of non-independent scattering, and the coupling effect is related to the distance between particles.
【作者单位】：南京理工大学能源与动力工程学院;
【基金】：国家自然科学基金(51476078)
【分类号】：O482;TB383.1
【正文快照】： 1引言当入射光波与金纳米颗粒相互作用时,会发生局域表面等离子共振(localized surface plasmonresonance,LSPR)现象,在入射光电场作用下金纳米颗粒的电子气团会产生相对于原来位置的位移,并随着电磁场的波动而震荡,从而引发金纳米颗粒内部晶格的共振,并获得热量,即所谓的金纳

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