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Reduced graphene oxide coated thin aluminum film as an optoacoustic transmitter for high pressure and high frequency ultrasound generation
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10.1063/1.4772498
/content/aip/journal/apl/101/24/10.1063/1.4772498
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/24/10.1063/1.4772498

Figures

Image of FIG. 1.
FIG. 1.

Sketch of the side view of rGO (20, 100, 200 nm) coated aluminum film (100 nm) on a glass substrate (500 μm).

Image of FIG. 2.
FIG. 2.

Experimental setup.

Image of FIG. 3.
FIG. 3.

Optoacoustic signals from each transmitter (Al-only, 20 nm rGO coated Al, 100 nm rGO coated Al, and 200 nm rGO coated Al) at 56 mJ/cm2 positioned 2.85 mm from the hydrophone.

Image of FIG. 4.
FIG. 4.

Maximum pressure of optoacoustic wave from 100 nm rGO coated Al according to the distance between the transmitter and detector for varying laser fluences.

Image of FIG. 5.
FIG. 5.

Maximum pressure of optoacoustic wave from 20 nm, 100 nm, 200 nm rGO coated Al and Al only for varying fluences as measured 2.85 mm from the sample.

Image of FIG. 6.
FIG. 6.

Visualization images of propagating optoacoustic (left running) wave from 4 different transmitters (Al-only, 20 nm rGO coated Al, 100 nm rGO coated Al, 100 nm rGO only) positioned on the right for 3 laser fluences (17.8 mJ/cm2, 30.56 mJ/cm2, and 43.28 mJ/cm2) taken at 4 μs after the laser shot directed from the left.

Image of FIG. 7.
FIG. 7.

Frequency spectra for the optoacoustic waves from 20 nm, 100 nm rGO coated Al and Al only) for 56 mJ/cm2 measured at 2.85 mm away from the sample.

Tables

Generic image for table
Table I.

Coefficient of thermal expansion for different materials.

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/content/aip/journal/apl/101/24/10.1063/1.4772498
2012-12-12
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Reduced graphene oxide coated thin aluminum film as an optoacoustic transmitter for high pressure and high frequency ultrasound generation
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/24/10.1063/1.4772498
10.1063/1.4772498
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