光学学报, 2020, 40 (4): 0429001, 网络出版: 2020-02-11
金纳米旋转椭球的光吸收和散射特性优化 下载: 1049次
Optimization of Light Absorption and Scattering Properties of Gold Nanospheroids
散射 光吸收与散射 优化 T矩阵方法 光热治疗 生物成像 scattering light absorption and scattering optimization T-matrix method photothermal therapy biological imaging
摘要
针对金纳米旋转椭球在光热治疗和生物成像中的应用,利用T矩阵方法和介电函数尺寸修正模型,从理论上定量研究金纳米旋转椭球的共振光吸收与散射特性,对金纳米旋转椭球的尺寸参数进行优化,获得最优的短半轴与长半轴。对于光热治疗中的常用波长,在特定尺寸参数范围内优化的金纳米旋转椭球在波长1064 nm处具有最大的吸收特性;对于生物成像中的常用波长,在特定尺寸参数范围内优化的金纳米旋转椭球在波长1310 nm处具有最大的散射特性。与金纳米球壳的优化结果对比发现,金纳米旋转椭球在光热治疗和生物成像的应用中比金纳米球壳具有明显的优势。
Abstract
The resonant light absorption and scattering properties of gold nanospheroids were quantitatively studied for their application in photothermal therapy (PPTT) and biological imaging via the T-matrix method with a size-dependent dielectric function. The size parameters, including the minor and major semi-axes, of these Au nanospheroids were accordingly optimized; for the common wavelengths used in PPTT and biological imaging, the optimized nanospheroids exhibited the maximum absorption and scattering at 1064 nm and 1310 nm, respectively, within the range of specified size parameters. The comparison of these results with those obtained by optimized gold nanoshells demonstrated the obvious advantage of these gold nanospheroids for PPTT and biological imaging applications.
夏伊丁·亚库普, 帕尔哈提江·吐尔孙, 武盼盼. 金纳米旋转椭球的光吸收和散射特性优化[J]. 光学学报, 2020, 40(4): 0429001. Xiayiding Yakupu, Paerhatijiang Tuersun, Panpan Wu. Optimization of Light Absorption and Scattering Properties of Gold Nanospheroids[J]. Acta Optica Sinica, 2020, 40(4): 0429001.