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Updated: Jun 22, 2026

Compact Quantum Dots for Single-molecule Imaging
Published on: October 9, 2012
Preparation and Sensing Study of Houttuynia cordata-Based Carbon Quantum Dots
Min Ye1, Lifen Meng1,2
1School of Chemical Engineering, Guizhou University of Engineering Science, Bijie 551700, China.
Abstract:
This study used Houttuynia cordata as the precursor to prepare high fluorescence quantum yield carbon quantum dots (Hc-CQDs) by a simple hydrothermal method. The surface of the Hc-CQDs contained abundant functional groups, such as carboxyl, hydroxyl, and amino groups, which indicated the Hc-CQDs had good water solubility. On the basis of the excellent fluorescence characteristics of Hc-CQDs, a sensor was constructed to achieve high selectivity detection of Cr3+, and the detection limit of the Hc-CQDs was 49 μg/L. The sensor also exhibited strong anti-interference ability and excellent reproducibility, which was used for the determination of Cr3+ in environmental water samples, and its spiked recovery rate reached over 90%. Therefore, the Hc-CQDs had potential application in the analysis.
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