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• W4387472742 abstract "Polysaccharide-based QDs have attracted great attention in the field of biological imaging and diagnostics. How to get rid of the high heavy metal toxicity resulting from conventional Cd- and Pb-based QDs is now the main challenge. Herein, we offer a simple and environmentally friendly approach for the direct interaction of thiol-ending carboxymethyl chitosan (CMC-SH) with metal salt precursors, resulting in CuInS2 QDs based on polysaccharides. A nucleation-growth mechanism based on the LaMer model can explain how CMC-CuInS2 QDs are formed. As-prepared water-soluble CMC-CuInS2 QDs exhibit monodisperse particles with sizes of 5.5-6.5 nm. CMC-CuInS2 QDs emit the bright-green fluorescence at 530 nm when excited at 466 nm with the highest quantum yield of ∼18.0%. Meanwhile, the fluorescence intensity of CMC-CuInS2 QD aqueous solution is quenched with the addition of Pb2+ and the minimal limit of detection is as little as 0.4 nM. Furthermore, due to its noncytotoxicity, great biocompatibility, and strong biorecognition ability, CMC-CuInS2 QDs can be exploited as a possible cell membrane imaging reagent. The imaging studies also demonstrate that CMC-CuInS2 QDs are suitable for Pb2+ detection in live cells and living organisms (zebrafish). Thus, this work offers such an efficient, green, and practical method for creating low-toxicity and water-soluble QD nanosensors for a sensitive and selective detection of toxic metal ion in live cells and organisms." @default.
• W4387472742 created "2023-10-11" @default.
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• W4387472742 date "2023-10-09" @default.
• W4387472742 modified "2023-10-16" @default.
• W4387472742 title "Green Synthesis of Carboxymethyl Chitosan-Based CuInS₂ QDs with Luminescent Response toward Pb²⁺ Ion and Its Application in Bioimaging" @default.
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• W4387472742 doi "https://doi.org/10.1021/acs.inorgchem.3c02901" @default.
• W4387472742 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37814218" @default.
• W4387472742 hasPublicationYear "2023" @default.
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