Candle soot nanoparticles-polydimethylsiloxane composites for laser ultrasound transducers
Candle soot nanoparticles-polydimethylsiloxane composites for laser ultrasound transducers
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DOI：
10.1063/1.4934587
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发表时间：
2015-10-19
影响因子：
4
通讯作者：
Jiang, Xiaoning
中科院分区：
文献类型：
--
作者：
Chang, Wei-Yi;Huang, Wenbin;Jiang, Xiaoning
高功率激光超声的产生强烈要求先进材料具有高效的激光能量吸收、快速的热扩散和大的热弹性膨胀能力。在这项研究中，研究了烛烟灰纳米粒子-聚二甲基硅氧烷（CSNPs-PDMS）复合材料作为具有高能量转换效率的光声换能器的功能层。所收集的蜡烛烟灰碳纳米粒子的平均直径约为45 nm，在532 nm波长处的光吸收率高达96.24%。对原型 CSNPs-PDMS 纳米复合材料激光超声换能器进行了表征，并分别与使用 Cr-PDMS、炭黑 (CB)-PDMS 和碳纳米纤维 (CNF)-PDMS 复合材料的换能器进行了比较。测得CSNPs-PDMS复合激光超声换能器的能量转换系数和-6 dB频率带宽分别为4.41 x 10(-3)和21 MHz。使用 CSNP-PDMS 纳米复合材料的前所未有的激光超声转导性能有望实现广泛的超声治疗应用。 (C) 2015 AIP 出版有限责任公司。
Generation of high power laser ultrasound strongly demands the advanced materials with efficient laser energy absorption, fast thermal diffusion, and large thermoelastic expansion capabilities. In this study, candle soot nanoparticles-polydimethylsiloxane (CSNPs-PDMS) composite was investigated as the functional layer for an optoacoustic transducer with high-energy conversion efficiency. The mean diameter of the collected candle soot carbon nanoparticles is about 45 nm, and the light absorption ratio at 532 nm wavelength is up to 96.24%. The prototyped CSNPs-PDMS nano-composite laser ultrasound transducer was characterized and compared with transducers using Cr-PDMS, carbon black (CB)-PDMS, and carbon nano-fiber (CNFs)-PDMS composites, respectively. Energy conversion coefficient and -6 dB frequency bandwidth of the CSNPs-PDMS composite laser ultrasound transducer were measured to be 4.41 x 10(-3) and 21MHz, respectively. The unprecedented laser ultrasound transduction performance using CSNPs-PDMS nano-composites is promising for a broad range of ultrasound therapy applications. (C) 2015 AIP Publishing LLC.