纳秒脉冲激光特性对金纳米球光声响应的影响  

Effect of Nanosecond Pulsed Laser Characteristics on Photoacoustic Response of Gold Nanospheres

作　　者：孙建平 苏彦雄 任亚涛[1] 齐宏[1] SUN Jian-Ping;SU Yan-Xiong;REN Ya-Tao;QI Hong(Harbin institute of technology,school of energy science and engineering,Harbin 150001,China)

机构地区：[1]哈尔滨工业大学能源科学与工程学院,哈尔滨150001

出　　处：《工程热物理学报》2022年第2期490-493,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.51806047),中央高校基本科研业务费专项资金(No.HIT.NSRIF.2019064)。

摘　　要：由于局部表面等离激元共振现象,金纳米颗粒具有显著的光热效应,而近年来随着人们对精准医疗和非介入性组织成像的需要,作为纳米颗粒光热衍生效应的金纳米颗粒光声效应得到了人们的广泛关注。金纳米颗粒自身特性对其光声效应的影响目前已经得到一定的研究,而对于脉冲激光特性对其光声效应的影响尚缺乏深入探讨,因此,本文对金纳米球在不同脉冲时间和脉冲强度作用下的光热响应与光声响应进行了定量研究。结果表明,脉冲时间增大会降低金纳米球最大温升,减小声信号的最大压强;脉冲强度的增加会使金纳米球最大温升和声信号增大。计算结果可为基于金纳米颗粒光声成像的激光器选择提供参考。Due to the phenomenon of local surface plasmon resonance,gold nanoparticles have significant photothermal effect.In recent years,with the need for accurate medical treatment and non-interventional tissue imaging,the photoacoustic effect of gold nanoparticles,as a photothermal derivative effect of gold nanoparticles,has been paid more and more attention.At present,the influence of the characteristics of gold nanoparticles on the photoacoustic effect has been studied,but the influence of pulsed laser characteristics on the photoacoustic effect has not been deeply discussed.Therefore,in this paper,the photothermal and photoacoustic responses of gold nanospheres under different pulse time and pulse influence are studied quantitatively.The results show that the increase of pulse time will decrease the maximum temperature rise of gold nanospheres and the maximum pressure of acoustic signals,and the increase of pulse influence will increase the maximum temperature rise and acoustic signals of gold nanospheres.The results can provide a reference for the selection of lasers based on photoacoustic imaging of gold nanoparticles.

关 键 词：金纳米球 脉冲激光 局部表面等离激元共振 光热响应 光声响应 

分 类 号：TK124[动力工程及工程热物理—工程热物理]