Acoustic pressure pulses from laser-irradiated suspensions containing gold nanospheres in water: Experimental and theoretical study

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• 作者：Hiroyuki Shinto^a ; ^{shinto@cheme.kyoto-u.ac.jp} ; Tomonori Fukasawa^a ; Hiroyuki Aoki^b ; ^c ; Shinzaburo Ito^b ; ^c ; Masahiro Ohshima^a
• 关键词：Photoacoustic imaging ; Photoacoustic pressure pulses ; Nanosecond laser pulses ; Contrast agents ; Metal nanoparticles ; Physical modeling
• 刊名：Colloids and Surfaces A: Physicochemical and Engineering Aspects
• 出版年：2013
• 出版时间：5 August, 2013
• 年：2013
• 卷：430
• 期：Complete
• 页码：51-57
• 全文大小：907 K

文摘

We present a physical model that describes the acoustic pressure pulses from diluted suspensions of metal nanospheres in a liquid medium irradiated by laser pulses. The experimental measurements of the photoacoustic signals are also reported, where the suspensions of 8-nm gold nanospheres in water at different concentrations and different temperatures were irradiated by 0.8-ns laser pulses. We mainly investigate how the nanosphere concentration and the suspension temperature influence the photoacoustic responses. The estimations from our model are found to be in good agreement with the results from the experiments.