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Carbon nanotube composite optoacoustic transmitters for strong and high frequency ultrasound generation
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10.1063/1.3522833
/content/aip/journal/apl/97/23/10.1063/1.3522833
http://aip.metastore.ingenta.com/content/aip/journal/apl/97/23/10.1063/1.3522833
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

SEM photographs of the CNT-PDMS composite films where the CNT growth time was 1 min in (a) and 3 min in (b) and the AuNP array before PDMS coating in (c). Fused silica substrates were used for all cases. The final film thickness of in (a) and in (b) under the same spin-coating condition of PDMS.

Image of FIG. 2.
FIG. 2.

Optoacoustic signal waveforms from Cr, AuNP coated with PDMS, and CNT coated with PDMS.

Image of FIG. 3.
FIG. 3.

(a) Frequency spectra for the time-domain optoacoustic waveforms in Fig. 2. The amplitude enhancement is clear, up to 120 MHz. (b) The same frequency spectra shown after normalization to each maximum (dc value). They are compared with the ideal spectrum of laser pulse (top trace).

Image of FIG. 4.
FIG. 4.

Experimental frequency spectra (solid) compared with the calculated results (dashed), which were obtained by using the 1D layered model, following the left axis. The difference in the experimental spectra is shown as pressure enhancement, following the right axis.

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/content/aip/journal/apl/97/23/10.1063/1.3522833
2010-12-08
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Carbon nanotube composite optoacoustic transmitters for strong and high frequency ultrasound generation
http://aip.metastore.ingenta.com/content/aip/journal/apl/97/23/10.1063/1.3522833
10.1063/1.3522833
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