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Stable solid‐state red fluorescence from organosilane‐functionalized carbon dots (CDs) with sizes around 3 nm is reported for the first time. Meanwhile, a novel method is also first reported for the efficient construction of dual‐fluorescence morphologies. The quantum yield of these solid‐state CDs and their aqueous solution is 9.60 and 50.7%, respectively. The fluorescence lifetime is 4.82 ns for...
Self‐quenching in the aggregation state is overcome, and tunable solid‐state photoluminescence of carbon‐dot powder is achieved. Furthermore, based on the controllable optical property in organic solvents, a novel concept, i.e., constructing dual‐fluorescence morphologies from single luminescent species, is presented to realize white‐light emission.
Graphitic carbon quantum dots (GCQDs) are obtained by hydrothermal treatment of commercially available activated carbon in the presence of KOH. Transmission electron microscope observation indicated narrow particle size distribution between 1 and 6 nm with an average diameter 3.5 nm and high crystallinity of GCQDs. The as-prepared GCQDs exhibited bright yellow luminescence under UV light irradiation...
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