Radiative properties of gold nanorod solutions and its temperature distribution under laser irradiation: Experimental investigation
Radiative properties of gold nanorod solutions and its temperature distribution under laser irradiation: Experimental investigation
复制标题
激光照射下金纳米棒溶液的辐射特性及其温度分布：实验研究
DOI：
10.1016/j.expthermflusci.2012.08.001
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发表时间：
2013
影响因子：
3.2
通讯作者：
NaiPing Gao
中科院分区：
文献类型：
--
作者：
Wei An;QunZhi Zhu;Tong Zhu;NaiPing Gao
贵金属纳米粒子的辐射特性在增强型光热转换应用中起着重要作用，并强烈影响着分散介质的温度分布。为了研究两种金纳米棒溶液（GNRs）的辐射特性，构建了一套定制的积分球光学系统，测量了GNRs的半球透过率和反射率。通过求解辐射反问题得到了GNR的吸收系数和消光系数。利用吸收系数与消光系数的比值来评价GNRs的光热转换效率。同时，利用热电偶和红外摄像机测量了GNR在激光辐照下的温度分布。分析了颗粒浓度、激光入射功率和颗粒尺寸对GNRs温度分布的影响。结果表明，颗粒浓度对GNR的温度分布有重要影响。适当低的浓度可以将更多的激光能量分散到更深的组织中，从而增强等离子体光热治疗的效果。此外，对于目前两种在808nm波长处消光系数相同的GNR，粒径对温度分布的影响相对较弱，但对光谱辐射特性有显著影响。
Radiative properties of noble metal nanoparticle play important roles in enhanced photothermal conversion applications, and intensively affect the temperature distribution of the dispersed media. In order to investigate the radiative properties of two kinds of gold nanorods solutions (GNRs), a customized integrating sphere optical system is constructed to measure the hemispherical transmittance and reflectance of GNRs. The absorption and extinction coefficients of GNRs are acquired by solving an inverse radiation problem. The ratio of absorption coefficient to extinction coefficient is used to evaluate the photothermal conversion efficiency of GNRs. At the same time, the temperature distributions of GNRs under laser irradiation are measured by thermocouples and an infrared camera. The effects of particle concentration, laser incident power, and particle size on the temperature distribution of GNRs are analyzed. The results indicate that the particle concentration has an important effect on the temperature profile of GNRs. A suitably lower concentration can disperse more laser energy into the deeper tissue, thereby enhancing the effect of the plasmonic photothermal therapy. Moreover, for present two kinds of GNRs with identical extinction coefficient at 808nm wavelength, the effect of particle size on the temperature distribution is relatively weaker, though it has a significant influence to their spectral radiative properties.
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DOI：
10.1016/c2010-0-65874-3
发表时间：
1993
期刊：
--
影响因子：
--
作者：
M. Modest
通讯作者：
M. Modest
影响因子：
3.7
作者：
Cole, Joseph R.;Mirin, Nikolay A.;Halas, Naomi J.
通讯作者：
Halas, Naomi J.
影响因子：
1.3
作者：
R.G.W. Brown
通讯作者：
R.G.W. Brown
影响因子：
1.9
作者：
PICKERING, JW;PRAHL, SA;VANGEMERT, MJC
通讯作者：
VANGEMERT, MJC
影响因子：
5.5
作者：
Maryuri Roca;A. Haes
通讯作者：
Maryuri Roca;A. Haes