Candle soot nanoparticles-polydimethylsiloxane composites for laser ultrasound transducers

Chang, Wei-Yi; Huang, Wenbin; Kim, Jin-Wook; Li, Sibo; Jiang, Xiaoning

doi:10.1063/1.4934587

Cited by 107 publications

(94 citation statements)

References 24 publications

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“…As an application of candle soot particles as a functional material, it was reported that bilayers composite of candle soot-polydimethylsiloxane (PDMS) can efficiently convert the high photonic energy of laser into an acoustic wave at ultrasonic frequency (Chang et al, 2015). Those results show the excellent optical absorption properties of candle soot particles and their capability to convert the photonic energy into local heating phenomena.…”

Section: Introductionmentioning

confidence: 62%

Carbonaceous Nanoparticle Layers Prepared using Candle Soot by Direct- and Spray-based Depositions

Faizal

Khairunnisa

Yokote

et al. 2018

Aerosol Air Qual. Res.

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To investigate the properties and structures of soot particles derived from candle combustion, two deposition routes were performed. In "Route-1," the aerosol (soot) particles were collected by direct exposure of a substrate in a chamber with controlled airflows. In "Route-2," deposited soot nanoparticles was transferred into suspension and subsequently, the deposition of particles on to the substrate was achieved by an electrospray. Raman spectral analysis has shown the difference of G-band intensity relative to D-band between hydrophobic and hydrophilic particle layers obtained from different collection regions of the candle flame. It also reveals the effect of airflows during the collection to the ratio of the D to G peak. Meanwhile, the Raman spectra of the particles seem invariant to the preparation methods of suspension and electrospray deposition process. From the curve gradient of spectroscopy (190-2500 nm) results, the electrospraydeposited particle layers (Route-2) show higher absorbance in the near-infrared region compared to direct-deposited particle layers (Route-1). This change in the spectrum may due to the change in morphology of nanoparticle layers formed by each route.

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Section: Introductionmentioning

confidence: 62%

Carbonaceous Nanoparticle Layers Prepared using Candle Soot by Direct- and Spray-based Depositions

Faizal

Khairunnisa

Yokote

et al. 2018

Aerosol Air Qual. Res.

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“…The increase in pressure amplitude with fluence was accompanied with a decrease in bandwidth due to broadening of the time-series pressure pulse. The nonlinear response from PNC sources made of allotropes of carbon to the applied fluence has also been previously reported [13] [14].…”

Section: Effect Of Laser Fluencementioning

confidence: 98%

Laser generated ultrasound sources using polymer nanocomposites for high frequency metrology

Rajagopal

Sainsbury

Treeby

et al. 2017

2017 IEEE International Ultrasonics Symposium (IUS)

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Abstract-Accurate characterization of ultrasound fields generated by diagnostic and therapeutic transducers is critical for patient safety. This requires hydrophones calibrated to a traceable standard and currently the upper calibration frequency range available to the user community is limited to a frequency of 40 MHz. However, the increasing use of high frequencies for both imaging and therapy necessitates calibrations to frequencies well beyond this range. For this to be possible, a source of high amplitude, broadband, quasi-planar and stable ultrasound fields is required. This is difficult to achieve using conventional piezoelectric sources, but laser generated ultrasound is a promising technique in this regard. In this study, various polymer-carbon nanotube nanocomposites (PNC) were fabricated and tested for their suitability for such an application by varying the polymer type, carbon nanotubes weight content in the polymer, and PNC thickness. A broadband hydrophone was used to measure the peak pressure and bandwidth of the laser generated ultrasound pulse. Peak-positive pressures of up to 8 MPa and −6dB bandwidths of up to 40 MHz were recorded. There is a nonlinear dependence of the peak pressure on the laser fluence and the bandwidth scales inversely proportionally to the peak pressure. The high-pressure plane waves generated from this preliminary investigation has demonstrated that laser generated ultrasound sources are a promising technique for high frequency calibration of hydrophones.

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“…(iv) More recently, candle soot carbon NPs (CSNPs)-PDMS nanocomposites are explored [57]. Figure 2 shows SEM pictures of CNTs, CNFs and CSNPs used in References [55][56][57], respectively. The ratio of photoacoustic conversion efficiency for CSNPs-PDMS, CNFs-PDMS, CNTs-PDMS, and CB-PDMS is 13:4.9:4.1:1 [57].…”

Section: Carbon-based Absorbersmentioning

confidence: 99%

“…Figure 2 shows SEM pictures of CNTs, CNFs and CSNPs used in References [55][56][57], respectively. The ratio of photoacoustic conversion efficiency for CSNPs-PDMS, CNFs-PDMS, CNTs-PDMS, and CB-PDMS is 13:4.9:4.1:1 [57]. The unprecedented LGUS transmission performance by CSNPs-PDMS nanocomposites shows the promise for ultrasound therapeutic applications.…”

Section: Carbon-based Absorbersmentioning

confidence: 99%

Review of Laser-Generated Ultrasound Transmitters and Their Applications to All-Optical Ultrasound Transducers and Imaging

Chen

2016

Applied Sciences

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Abstract:Medical ultrasound is an imaging technique that utilizes ultrasonic signals as information carriers, and has wide applications such as seeing internal body structures, finding a source of a disease, and examining pregnant women. The most commonly used ultrasonic transducer today is based on piezoelectricity. The piezoelectric transducer, however, may have a limited bandwidth and insufficient sensitivity for reduced element size. Laser-generated ultrasound (LGUS) technique is an effective way to resolve these issues. The LGUS approach based on photoacoustic effect is able to greatly enhance the bandwidth of ultrasound signals and has the potential for high-resolution imaging. High-amplitude LGUS could also be used for therapy to accomplish high precision surgery without an incision. Furthermore, LGUS in conjunction with optical detection of ultrasound allows all-optical ultrasound imaging (i.e., ultrasound is generated and received optically). The all-optical platform offers unique advantages in providing high-resolution information and in facilitating the construction of miniature probes for endoscopic ultrasound. In this article, a detailed review of the recent development of various LGUS transmitters is presented. In addition, a recent research interest in all-optical ultrasound imaging, as well as its applications, is also discussed.

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Candle soot nanoparticles-polydimethylsiloxane composites for laser ultrasound transducers

Cited by 107 publications

References 24 publications

Carbonaceous Nanoparticle Layers Prepared using Candle Soot by Direct- and Spray-based Depositions

Carbonaceous Nanoparticle Layers Prepared using Candle Soot by Direct- and Spray-based Depositions

Laser generated ultrasound sources using polymer nanocomposites for high frequency metrology

Review of Laser-Generated Ultrasound Transmitters and Their Applications to All-Optical Ultrasound Transducers and Imaging

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