Highly fluorescent water-soluble and nitrogen-doped carbon dots (NCDs) were synthesized by a simple one-pot hydrothermal method using citric acid as carbon source and urea as nitrogen source.

A facile and economical hydrothermal method was developed for the preparation of highly luminescent NCDs by using cabbage juice as carbon source and PP as nitrogen source. The fluorescence intensity of CA-NCDs was quenched by Fe3+ with high sensitivity and selectivity.

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Taking the hepatic sinusoid (HS) as the main delivery area of liver nutrient and metabolic waste, recognizing its structure is important for the deep understanding of liver function. In this...