Smartphone-assisted hydrogel sensing platform based on double emission carbon dots for portable on-site tetracycline detection

IF 5.3 2区化学 Q1 CHEMISTRY, ANALYTICAL Microchimica Acta Pub Date : 2025-01-10 DOI:10.1007/s00604-024-06936-7

Tingyu Zhang, Tingting Cai, Tanlai Yu, Yi Zhang

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Abstract

Innovative double-emission carbon dots (DE-CDs) were synthesized via a one-step hydrothermal method using fennel and m-phenylenediamine (m-PD) as precursors. These DE-CDs exhibited dual emission wavelengths at 432 and 515 nm under different excitations, making them highly versatile for fluorescence-based applications. The fluorescence of the DE-CDs was efficiently quenched by tetracycline (TC) through the inner filter effect (IFE), allowing for the construction of a sensitive dual-response fluorescent sensor. This sensor demonstrated a strong exponential correlation with TC concentrations in the range 0.99–118 μM, achieving a low detection limit of 53.4 nM, which is appropriate for environmental monitoring. To further enhance its practicality, a smartphone-integrated fluorescent hydrogel film sensing platform was developed. This portable and user-friendly system enabled rapid, on-site TC detection in water samples, combining high sensitivity with convenience for real-world applications. The integration of the DE-CD-based sensor into a hydrogel platform addressed the challenge of translating laboratory precision into field-ready tools. This study revealed the potential of DE-CDs as a robust and efficient solution for bridging the gap between laboratory-based analysis and portable, on-site environmental monitoring.

Graphical Abstract

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基于双发射碳点的智能手机辅助水凝胶传感平台便携式四环素现场检测

以茴香和间苯二胺（m-PD）为前驱物，采用一步水热法制备了新型双发射碳点（DE-CDs）。这些DE-CDs在不同的激发下表现出432和515 nm的双发射波长，使它们在基于荧光的应用中具有高度的通能性。DE-CDs的荧光被四环素（TC）通过内滤光效应（IFE）有效猝灭，从而构建了灵敏的双响应荧光传感器。该传感器在0.99 ~ 118 μM范围内与TC浓度呈较强的指数相关性，检测限低至53.4 nM，适用于环境监测。为了进一步提高其实用性，开发了智能手机集成荧光水凝胶膜传感平台。这种便携式和用户友好的系统可以在水样中进行快速的现场TC检测，将高灵敏度与实际应用的便利性相结合。将基于de - cd的传感器集成到水凝胶平台中，解决了将实验室精度转化为现场可用工具的挑战。这项研究揭示了de - cd作为一种强大而有效的解决方案的潜力，可以弥合基于实验室的分析和便携式现场环境监测之间的差距。图形抽象

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来源期刊

Microchimica Acta 化学-分析化学

CiteScore

9.80

自引率

5.30%

发文量

410

审稿时长

2.7 months

期刊介绍： As a peer-reviewed journal for analytical sciences and technologies on the micro- and nanoscale, Microchimica Acta has established itself as a premier forum for truly novel approaches in chemical and biochemical analysis. Coverage includes methods and devices that provide expedient solutions to the most contemporary demands in this area. Examples are point-of-care technologies, wearable (bio)sensors, in-vivo-monitoring, micro/nanomotors and materials based on synthetic biology as well as biomedical imaging and targeting.