Carbon nanotube composite optoacoustic transmitters for strong and high frequency ultrasound generation
Carbon nanotube composite optoacoustic transmitters for strong and high frequency ultrasound generation
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DOI：
10.1063/1.3522833
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发表时间：
2010-12-06
影响因子：
4
通讯作者：
Guo, L. Jay
中科院分区：
文献类型：
--
作者：
Baac, Hyoung Won;Ok, Jong G.;Guo, L. Jay
我们展示了碳纳米管（CNT）复合材料为基础的光声发射器，产生强大的高频超声。该复合材料由生长在基底上的碳纳米管组成，该碳纳米管嵌入用作声学传递介质的弹性体聚合物中。在脉冲激光激发下，该复合材料产生非常强的光声压：比铬膜参考强18倍，比具有相同聚合物的金纳米颗粒复合材料强5倍。这种增强在高达120 MHz的宽带频率范围内持续存在，并通过计算得到证实。我们建议CNT-聚合物复合材料作为高分辨率超声成像的高效光声发射器。(C)2010年美国物理学会。[doi：10.1063/1.3522833]
We demonstrate carbon nanotube (CNT) composite-based optoacoustic transmitters that generate strong and high frequency ultrasound. The composite consists of CNTs grown on a substrate, which are embedded in elastomeric polymer used as an acoustic transfer medium. Under pulsed laser excitation, the composite generates very strong optoacoustic pressure: 18 times stronger than a Cr film reference and five times stronger than a gold nanoparticle composite with the same polymer. This enhancement persists over a broadband frequency range of up to 120 MHz and is confirmed by calculation. We suggest the CNT-polymer composites as highly efficient optoacoustic transmitters for high resolution ultrasound imaging. (C) 2010 American Institute of Physics. [doi:10.1063/1.3522833]