title: Carbon nanotube composite optoacoustic transmitters for strong and high frequency ultrasound generation.
abstract: 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.
authors.forename: Hyoung
authors.initials: H
authors.lastname: Won Baac
authors.forename: Jong G
authors.initials: JG
authors.lastname: Ok
authors.forename: Hui Joon
authors.initials: HJ
authors.lastname: Park
authors.forename: Tao
authors.initials: T
authors.lastname: Ling
authors.forename: Sung-Liang
authors.initials: SL
authors.lastname: Chen
authors.forename: A John
authors.initials: AJ
authors.lastname: Hart
authors.forename: L Jay
authors.initials: LJ
authors.lastname: Guo