A new model of high-intensity focused ultrasound generation by radiation from a composite nanothinfilm made of carbon nanotubes (CNTs) and elastomeric polymer is presented in this paper. The composite nanothinfilm is deposited to the surface of a concave lens and the performance of focused ultrasound generated by an incident pulsed laser onto the lens is analyzed. The analysis and results are verified by comparing with published experimental data and very good agreement is recorded. The opto-acoustic pressure on the symmetric axis and the lateral focal plane are investigated analytically and the result indicates that excellent acoustic performance is found to be present in the vicinity of the focus region. The temporal performance of the focused lens is also investigated both at the focal point and the prefocal zone and very good agreement comparing with experiment is obtained. Conclusively, it is demonstrated theoretically that there exists an optimal input frequency for a pulsed laser at which the performance of the focused lens can be tremendously enhanced. In general, this new analytical model provides new guidelines in the design of high-intensity ultrasound lens, hence opening up promising applications to medical ultrasonography treatment.
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August 2014
Research-Article
Generation of High-Intensity Focused Ultrasound by Carbon Nanotube Opto-Acoustic Lens
L. H. Tong,
L. H. Tong
Department of Modern Mechanics,
University of Science and Technology of China
,Hefei, Anhui 230026
, China
;USTC-CityU Joint Advanced Research Centre
, Suzhou, Jiangsu 215123
, China
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C. W. Lim,
Research Institute,
C. W. Lim
1
Department of Civil and
Architectural Engineering,
Architectural Engineering,
City University of Hong Kong
,Kowloon, Hong Kong SAR
, China
;City University of Hong Kong Shenzhen
Research Institute,
Shenzhen 518057
, China
;1Corresponding author.
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Y. C. Li
Y. C. Li
Department of Modern Mechanics,
University of Science and Technology of China
,Hefei, Anhui 230026
, China
Search for other works by this author on:
L. H. Tong
Department of Modern Mechanics,
University of Science and Technology of China
,Hefei, Anhui 230026
, China
;USTC-CityU Joint Advanced Research Centre
, Suzhou, Jiangsu 215123
, China
C. W. Lim
Department of Civil and
Architectural Engineering,
Architectural Engineering,
City University of Hong Kong
,Kowloon, Hong Kong SAR
, China
;City University of Hong Kong Shenzhen
Research Institute,
Shenzhen 518057
, China
;
Y. C. Li
Department of Modern Mechanics,
University of Science and Technology of China
,Hefei, Anhui 230026
, China
1Corresponding author.
Contributed by the Applied Mechanics Division of ASME for publication in the JOURNAL OF APPLIED MECHANICS. Manuscript received March 19, 2014; final manuscript received May 26, 2014; accepted manuscript posted May 29, 2014; published online June 13, 2014. Assoc. Editor: Weinong Chen.
J. Appl. Mech. Aug 2014, 81(8): 081014 (11 pages)
Published Online: June 13, 2014
Article history
Received:
March 19, 2014
Revision Received:
May 26, 2014
Accepted:
May 29, 2014
Citation
Tong, L. H., Lim, C. W., and Li, Y. C. (June 13, 2014). "Generation of High-Intensity Focused Ultrasound by Carbon Nanotube Opto-Acoustic Lens." ASME. J. Appl. Mech. August 2014; 81(8): 081014. https://doi.org/10.1115/1.4027752
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