Early Diagnosis of Tumorigenesis via Ratiometric Carbon Dots with Deep-Red Emissive Fluorescence Based on NAD⁺ Dependence.

The Abs 390nm and Abs 566nm /Abs 390nm showed a trend of rapid increase at first and then a slow increase while increasing the NAD + concentration ([NAD + ]), which was consistent with the result observed with the confocal laser scanning microscope.

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