Enhanced of the R6G thermal diffusivity on aggregated small gold particles
Enhanced of the R6G thermal diffusivity on aggregated small gold particles
复制标题
增强聚集的小金颗粒上的 R6G 热扩散率
DOI：
10.1590/s0103-97332006000600060
复制
发表时间：
2006
影响因子：
1.6
通讯作者：
J. L. H. Pérez
中科院分区：
文献类型：
--
作者：
J. L. Pérez;J. F. S. Ramírez;R. G. Fuentes;A. Cruz;J. L. H. Pérez
在水溶液中制备了含金纳米颗粒的R6G染料。利用热透镜实验装置，测量了R6G在不同浓度的金纳米粒子存在下的热扩散率。结果表明，R6G染料与金纳米颗粒混合后的热扩散率随着金属颗粒浓度的增加而增大，从而增强了其在溶液中的热扩散性。当R6G染料的浓度为0.1g/L时，研究了样品的热扩散率，利用激光失配模式下的热透镜像差模型得到了样品的热扩散率。通过将瞬时热透镜的理论表达式与实验数据进行拟合，得到了瞬时热透镜的特征时间常数。利用紫外可见光谱和透射电子显微镜对R6G染料金纳米粒子进行了表征。
R6G dye with gold nanoparticles was prepared in water solution. Using a thermal lens experimental setup, the thermal diffusivity of R6G in presence of gold nanoparticles with Au different concentration was measured. The results show that, the thermal diffusivity of R6G dye mixed with gold nanoparticles increases with the increase of particle metallic concentration, enhancing the thermal diffusivity in the solution. The thermal diffusivity of the samples was studied for a constant concentration of R6G dye 0.1 g/L. The diffusivities were obtained by using the thermal lens aberrant model with lasers arranged in the mismatched mode. The characteristic time constant of the transient thermal lens was obtained by fitting the theoretical expression, for transient thermal lens, to the experimental data. UV-Vis spectroscopy and TEM were used to characterize the R6G dye gold nanoparticles.