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Fiber-optic Ultrasound Transducers with Carbon/PDMS Composite Coatings

Mosse, CA; Colchester, RJ; Bhachu, DS; Zhang, EZ; Papakonstantinou, I; Desjardins, AE; (2014) Fiber-optic Ultrasound Transducers with Carbon/PDMS Composite Coatings. In: Oraevsky, AA and Wang, LV, (eds.) Proceedings of SPIE Photons Plus Ultrasound: Imaging and Sensing 2014. (pp. 89430P-1). SPIE: San Francisco, CA, United States. Green open access

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Abstract

Novel ultrasound transducers were created with a composite of carbon nanotubes (CNTs) and polydimethylsiloxane (PDMS) that was dip coated onto the end faces of optical fibers. The CNTs were functionalized with oleylamine to allow for their dissolution in xylene, a solvent of PDMS. Ultrasound pulses were generated by illuminating the composite coating with pulsed laser light. At distances of 2 to 16 mm from the end faces, ultrasound pressures ranged from 0.81 to 0.07 MPa and from 0.27 to 0.03 MPa with 105 and 200 μm core fibers, respectively. Using an optical fiber hydrophone positioned adjacent to the coated 200 µm core optical fiber, ultrasound reflectance measurements were obtained from the outer surface of a sheep heart ventricle. The results of this study suggest that ultrasound transducers that comprise optical fibers with CNT-PDMS composite coatings may be suitable for miniature medical imaging probes.

Type: Proceedings paper
Title: Fiber-optic Ultrasound Transducers with Carbon/PDMS Composite Coatings
Event: SPIE BIOS 2014 - Photons Plus Ultrasound: Imaging and Sensing
Location: San Francisco, CA
Dates: 02 February 2014 - 05 February 2014
Open access status: An open access version is available from UCL Discovery
DOI: 10.1117/12.2037283
Publisher version: https://doi.org/10.1117/12.2037283
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Science & Technology, Physical Sciences, Life Sciences & Biomedicine, Optics, Radiology, Nuclear Medicine & Medical Imaging, Laser-generated ultrasound, photoacoustic, optical fiber, carbon nanotubes, PDMS, FILM
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1419130
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