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Spiropyran-modified silicon quantum dots (Si QDs) were successfully fabricated through covalently linking the aminated Si QDs and spiropyrans. In comparison with Si QDs, the fluorescence emission peaks of the Si QDs in the spiropyran-modified Si QDs always locate at 525 nm irrespective of the excitation wavelengths. The spiropyran-modified Si QDs showed reversible photoluminescence. Blue-green fluorescence...
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