Abstract

Highlights • This study demonstrates the synthesis of photoluminescent C-Au nanocomposites (C-Au NC) for multi-color cellular imaging in replacement of high priced fluorescence molecules and synthetic dyes. • The synthesized C-Au NC can be used to detect both normal and abnormal levels of creatinine. • The reducing and capping capabilities of Citrullus lanatus derived carbon nano dots (CNDs) for C-Au NC synthesis were investigated. • C-Au NC showed excellent biocompatibility against cancer and normal cell lines which can be used for biomedical applications.

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