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Eco-friendly ink formulation of column purified carbon dots from GABA for anticounterfeiting applications

Namratha Ullal,Dhanya Sunil,Suresh D. Kulkarni,Rajeev K. Sinha,P.J. Anand,Udaya K. Bhat

Journal of Photochemistry and Photobiology A: Chemistry（2023）

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Abstract
•GABA-derived CDs: Synthesis & purification by column chromatography.•CDs with green emission in solution & yellow solid-state emission under UV light.•Theoretical studies to support structural, vibrational, & electronic features of CDs.•Flexo-prints with good lightfastness, stability & rub resistance using water-based ink.•Forger sees yellow fluorescence & user authentication by Cu2+ ion induced quenching.
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Key words
carbon dots,gaba,eco-friendly
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