纳秒脉冲激光特性对金纳米球光声响应的影响

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...

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

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.