Silicon oxide colloidalpolymer nanocomposite films

Haifeng Wang; Wenwu Cao; Q. F. Zhou; K. Kirk Shung; Y. H. Huang

doi:10.1063/1.1836018

Silicon oxide colloidalpolymer nanocomposite films

Haifeng Wang, Wenwu Cao, Q. F. Zhou, K. Kirk Shung, Y. H. Huang

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

The quarter-wavelength (λ4) acoustic matching layer, a vital component in medical ultrasonic transducer, can bridge the large acoustic impedance mismatch between the piezoelectric material and the human body. Composite materials are widely used as matching materials in order to cover the wide acoustic impedance range that cannot be accomplished by using a single-phase material. At high frequencies (>50 MHz), the λ4 matching layers become extremely thin so that the fabrication of homogeneous composite material matching layers becomes very challenging. A method is reported in this letter to fabricate sol-gel silicon oxide colloidalpolymer composite film on silicon substrate, in which the particle size of silicon oxide colloidal is between 10 and 40 nm. The acoustic impedance of the nanocomposite films versus aging temperature has been measured at the desired operating frequency.

Original language	English (US)
Pages (from-to)	5998-6000
Number of pages	3
Journal	Applied Physics Letters
Volume	85
Issue number	24
DOIs	https://doi.org/10.1063/1.1836018
State	Published - Dec 13 2004

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.1836018

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title = "Silicon oxide colloidalpolymer nanocomposite films",

abstract = "The quarter-wavelength (λ4) acoustic matching layer, a vital component in medical ultrasonic transducer, can bridge the large acoustic impedance mismatch between the piezoelectric material and the human body. Composite materials are widely used as matching materials in order to cover the wide acoustic impedance range that cannot be accomplished by using a single-phase material. At high frequencies (>50 MHz), the λ4 matching layers become extremely thin so that the fabrication of homogeneous composite material matching layers becomes very challenging. A method is reported in this letter to fabricate sol-gel silicon oxide colloidalpolymer composite film on silicon substrate, in which the particle size of silicon oxide colloidal is between 10 and 40 nm. The acoustic impedance of the nanocomposite films versus aging temperature has been measured at the desired operating frequency.",

author = "Haifeng Wang and Wenwu Cao and Zhou, {Q. F.} and Shung, {K. Kirk} and Huang, {Y. H.}",

note = "Funding Information: This research was sponsored by the NIH Grant for the Ultrasonic Transducer Engineering Resource (Grant No. P41-EB2182-07). The authors would like to thank T. F. Hung of the City University of Hong Kong for his assistance in obtaining the SEM micrograph.",

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doi = "10.1063/1.1836018",

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journal = "Applied Physics Letters",

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T1 - Silicon oxide colloidalpolymer nanocomposite films

AU - Wang, Haifeng

AU - Cao, Wenwu

AU - Zhou, Q. F.

AU - Shung, K. Kirk

AU - Huang, Y. H.

N1 - Funding Information: This research was sponsored by the NIH Grant for the Ultrasonic Transducer Engineering Resource (Grant No. P41-EB2182-07). The authors would like to thank T. F. Hung of the City University of Hong Kong for his assistance in obtaining the SEM micrograph.

PY - 2004/12/13

Y1 - 2004/12/13

N2 - The quarter-wavelength (λ4) acoustic matching layer, a vital component in medical ultrasonic transducer, can bridge the large acoustic impedance mismatch between the piezoelectric material and the human body. Composite materials are widely used as matching materials in order to cover the wide acoustic impedance range that cannot be accomplished by using a single-phase material. At high frequencies (>50 MHz), the λ4 matching layers become extremely thin so that the fabrication of homogeneous composite material matching layers becomes very challenging. A method is reported in this letter to fabricate sol-gel silicon oxide colloidalpolymer composite film on silicon substrate, in which the particle size of silicon oxide colloidal is between 10 and 40 nm. The acoustic impedance of the nanocomposite films versus aging temperature has been measured at the desired operating frequency.

AB - The quarter-wavelength (λ4) acoustic matching layer, a vital component in medical ultrasonic transducer, can bridge the large acoustic impedance mismatch between the piezoelectric material and the human body. Composite materials are widely used as matching materials in order to cover the wide acoustic impedance range that cannot be accomplished by using a single-phase material. At high frequencies (>50 MHz), the λ4 matching layers become extremely thin so that the fabrication of homogeneous composite material matching layers becomes very challenging. A method is reported in this letter to fabricate sol-gel silicon oxide colloidalpolymer composite film on silicon substrate, in which the particle size of silicon oxide colloidal is between 10 and 40 nm. The acoustic impedance of the nanocomposite films versus aging temperature has been measured at the desired operating frequency.

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JF - Applied Physics Letters

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Silicon oxide colloidalpolymer nanocomposite films

Abstract

All Science Journal Classification (ASJC) codes

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