TY - GEN
T1 - Optical generation of high frequency ultrasound using a two dimensional array of gold nanoparticles
AU - Hou, Yang
AU - Kim, Jin Sung
AU - Ashkenazi, Shai
AU - O'Donnell, Matthew
AU - Guo, L. Jay
PY - 2006/12/1
Y1 - 2006/12/1
N2 - The thermoelastic effect in a thin film is used to produce high-frequency, high-intensity ultrasound for applications in water and soft tissue. We have fabricated a structure that consists of 2-D arrangements of gold nanoparticles, sandwiched between a transparent substrate and a 4.5 μm thick PDMS layer. The acoustic signal displays significant improvements compared to a bulk black PDMS film (the current state of the art) at frequencies from 50-100 MHz. When a 5 ns laser pulse with energy of 25 μJ is delivered to a spot size of 25 μm, the acoustic pressure can reach 500 kPa at a distance of 10 mm away from the film surface. We also propose a convenient method to construct an integrated transmit/receive optoacoustic array based on the high optical extinction ratio of the film. These results show that this PDMS film with 2D array of gold nanoparticles can be used to produce high-frequency arrays for ultrasound imaging.
AB - The thermoelastic effect in a thin film is used to produce high-frequency, high-intensity ultrasound for applications in water and soft tissue. We have fabricated a structure that consists of 2-D arrangements of gold nanoparticles, sandwiched between a transparent substrate and a 4.5 μm thick PDMS layer. The acoustic signal displays significant improvements compared to a bulk black PDMS film (the current state of the art) at frequencies from 50-100 MHz. When a 5 ns laser pulse with energy of 25 μJ is delivered to a spot size of 25 μm, the acoustic pressure can reach 500 kPa at a distance of 10 mm away from the film surface. We also propose a convenient method to construct an integrated transmit/receive optoacoustic array based on the high optical extinction ratio of the film. These results show that this PDMS film with 2D array of gold nanoparticles can be used to produce high-frequency arrays for ultrasound imaging.
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U2 - 10.1109/ULTSYM.2006.113
DO - 10.1109/ULTSYM.2006.113
M3 - Conference contribution
AN - SCOPUS:47249101188
SN - 1424402018
SN - 9781424402014
T3 - Proceedings - IEEE Ultrasonics Symposium
SP - 401
EP - 404
BT - 2006 IEEE International Ultrasonics Symposium, IUS
T2 - 2006 IEEE International Ultrasonics Symposium, IUS
Y2 - 3 October 2006 through 6 October 2006
ER -