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17 March 2016 Optoacoustic response from graphene-based solutions embedded in optical phantoms by using 905-nm high-power diode-laser assemblies
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Abstract
During the last two decades, optoacoustic imaging has been developed as a novel biomedical imaging technique based on the generation of ultrasound waves by means of laser light. In this work, we investigate the optoacoustic response from graphene-based solutions by using a compact and cost-effective system based on an assembly of several 905-nm pulsed high-power diode lasers coupled to a bundle of 200-μm diameter- core optical fibers. The coupled light is conveyed into a lens system and focused on an absorber consisting of graphene-based nanomaterials (graphene oxide, reduced graphene oxide, and reduced graphene-oxide/gold-nanoparticle hybrid, respectively) diluted in ethanol and hosted in slightly scattering optical phantoms. The high absorption of these graphene-based solutions suggests their potential future use in optoacoustic applications as contrast agents.
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Luca Leggio, Daniel C. Gallego, Sandeep Babu Gawali, Ehsan Dadrasnia, Miguel Sánchez, Sergio Rodríguez, Marta González, Guillermo Carpintero, Marek Osiński, and Horacio Lamela "Optoacoustic response from graphene-based solutions embedded in optical phantoms by using 905-nm high-power diode-laser assemblies", Proc. SPIE 9708, Photons Plus Ultrasound: Imaging and Sensing 2016, 97083M (17 March 2016); https://doi.org/10.1117/12.2207245
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