Carbon nanotube composite optoacoustic transmitters for strong and high frequency ultrasound generation

被引：157

作者：

Baac, Hyoung Won ^{[1
]}

Ok, Jong G. ^{[2
]}

Park, Hui Joon

Ling, Tao ^{[1
]}

Chen, Sung-Liang ^{[1
]}

Hart, A. John ^{[2
]}

Guo, L. Jay ^{[1
]}

机构：

[1] Univ Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48109 USA

[2] Univ Michigan, Dept Mech Engn, Ann Arbor, MI 48109 USA

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 23期

关键词：

Laser excitation - Photoacoustic effect - Yarn - Carbon nanotubes - Transmitters - Ultrasonic imaging;

D O I：

10.1063/1.3522833

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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]

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