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We propose a new approach called localized photothermal curing (LPC) to fabricate carbon nanotube (CNT)-polydimethylsiloxane (PDMS) composite transmitters for optoacoustic generation of high-frequency, high-amplitude ultrasound. The LPC uses nanosecond-pulsed laser irradiation to cure prepolymer liquid surrounding CNT strands in a composite form. These transmitters can produce peak pressure amplitudes...
Compared with conventional piezoelectric transductions, an all-optical high-frequency ultrasound (HFUS) transducer is a promising modality for high-resolution ultrasound imaging. We demonstrate an all-optical HFUS transducer by integrating a carbon nanotube–polydimethylsiloxane composite film with an etalon thin-film structure incorporating SiO2/TiO2 distributed Bragg reflectors and an SU-8 resonator...
Ultrasound sensing was investigated with SU-8 polymer based Fabry-Perot interferometers consisting of TiO2/SiO2 distributed Bragg mirrors (DBRs). The DBRs are properly modified to transmit an excitation pulse laser (532 nm) generating ultrasound in all-optical transducers.
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