Preparation and Application of Dual-Emission Fluorescent Probe Based on Carbon Dots Coupled with Gold Nanoclusters

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Abstract Carbon dots (CD) were synthesized from citric acid using a hydrothermal method, and gold nanoclusters (AuNCs) were prepared from chloroauric acid (HAuCl₄) with sulfur-containing hyperbranched polyamide-amines as template and reducing agent. Then, the double-emitting fluorescent probes (CD-AuNCs) were obtained by mixing carbon dots and gold nanoclusters. Transmission electron microscopy images showed that the particle diameters of CD both were about 2 nm and dispersed uniformly. The effect of pH on the fluorescence performance of CD-AuNCs was investigated. It was found that the fluorescence of CD-AuNCs reached the strongest at pH=6, and CD-AuNCs responsed sensitively to tetracyclines (TCs) at this pH. The CD-AuNCs probe is not only highly selective, but also has the advantages of a wider linear range and a higher sensitivity than the single CD probe.

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	Articles by authors
	Zhang Xiaoyin
	Yu Liping

Keywords： carbon dots； gold nanoclusters； tetracyclines

Received 2019-01-26;

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Zhang Xiaoyin, Yu Liping.Preparation and Application of Dual-Emission Fluorescent Probe Based on Carbon Dots Coupled with Gold Nanoclusters[J] Chemcial Industry and Engineering, 2020,V37(2): 54-59

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