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Fluorescence sensor based on optimized quantum yield manganese-carbon polymer dots and smartphone-integrated sensing platform for tetracycline detection

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Abstract

The one-step synthesis of Mn-doped carbon quantum dots (Mn-CPDs) with a high quantum yield (QY = 45%) is reported using the microwave-assisted method. Subsequently, Mn-CPDs were successfully combined with Eu3+ ions to construct an Eu3+@Mn-CPDs fluorescence sensor. The presence of tetracycline (TC) induced a transition of fluorescence emission from blue (434 nm) to red (618 nm), and a robust linear relationship was observed between the ratio of F618 nm / F434 nm and the TC concentration (5 − 50 nmol/L), with a limit of detection (LOD) of 5.76 nmol/L. The underlying mechanism of Eu3+@Mn-CPDs and TC sensing is unveiled as a synergistic effect involving inner filter effect (IFE) and concurrent interactions. Notably, the smartphone-integrated sensing platform based on Eu3+@Mn-CPDs enables rapid and quantitative TC detection within a short time (< 30 s) by monitoring fluorescence color changes, achieving high-detection sensitivities (with a LOD of 6.18 nmol/L). This versatile and efficient sensing platform demonstrates its potential for the determination of TC concentrations in milk, honey, and tap water samples.

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Data Availability

The datasets generated during and/or analysed during the current study are not publicly available due [REASON WHY DATA ARE NOT PUBLIC] but are available from the corresponding author on reasonable request.

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Acknowledgements

This work is supported by the National Natural Science Foundation of China (Grant No. 52064032, 52174345, 32102073), the Yunnan Science and Technology Projects (Grant No. 202202AG050004, 202202AG050009).

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Authors and Affiliations

  1. Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China

    Yushu Han, Xin Kong, Rui Bao, Liang Liu, Lin Lan, Zhenfeng Gan & Jianhong Yi

  2. Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China

    Ying Gu & Lunzhao Yi

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  1. Yushu Han
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Correspondence to Xin Kong, Ying Gu or Rui Bao.

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Han, Y., Kong, X., Gu, Y. et al. Fluorescence sensor based on optimized quantum yield manganese-carbon polymer dots and smartphone-integrated sensing platform for tetracycline detection. Microchim Acta 191, 141 (2024). https://doi.org/10.1007/s00604-024-06225-3

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