Journal
LASER & PHOTONICS REVIEWS
Volume 17, Issue 1, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/lpor.202200295
Keywords
carbon dots; NIR-emission; ultra-broadband photoluminescence
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Carbon dots (CDs) are a promising type of fluorescent materials with excellent properties. Laser-assisted synthesis allows the production of near-infrared emitting CDs.
Carbon dots (CDs) emerge as a novel type of fluorescent materials with a good photostability, biocompatibility, and high quantum yield. They become a promising alternative to conventional fluorescent materials such as rare-earth phosphors and semiconductor quantum dots owing to their ease of synthesis and fabrication from ready-available compounds. Near-infrared (NIR) CDs are of high demand for in vivo studies owing to little photoinduced damage to surrounding tissues, deep penetration of radiation into tissue, and low autofluorescence. A laser-assisted synthesis approach is demonstrated, which allows NIR-emitting CDs to be obtained. By rapidly heating the precursors (4,4'-bis(diethylamino)benzophenone in sol-gel matrix) with femtosecond pulses, NIR emitting CDs can be obtained with the emission in the ranges of 800-1000 and 1100-1600 nm of the resulting CDs.
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