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<p>An ultrafast fluorescent sensor based on polymer dots (PDs) probe was developed for the portable on-site determination of copper (Cu²⁺) contamination in aquatic products. Due to the secondary internal filtering effect (IFE) induced by coordination of Cu²⁺ with polyethyleneimine (PEI) moieties on PDs surface, the probe enabled ultrafast (within 5&#xa0;s) and highly sensitive (limit of detection of 52 nM) detection of Cu²⁺. Furthermore, an integrated sensing array composed of PDs/poly(vinyl alcohol) (PVA) film was developed, allowing high-throughput and simultaneous analysis of multiple aquatic product samples within 1&#xa0;min. By combining quick-response (QR) code technology with smartphone-assisted data processing, a multidimensional dataset was established, including Cu²⁺ concentration, testing location, and temporal information. The PDs/PVA film-based monitoring platform offers a comprehensive approach for tracking Cu²⁺ contamination in aquatic products and shows great potential for applications in food safety surveillance and quality management.</p> Graphical abstract <p></p>

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Intelligent polymer dots/poly(vinyl alcohol)  film-based sensor array for rapid on-site monitoring of copper contamination in aquatic products

  • 期刊论文

  • 发表日期：

    2026年4月13日

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  • Qi Nie,
  • Xuehong Yuan,
  • Yiwei Liu,
  • Jinju Hou,
  • Li Zhang

摘要

An ultrafast fluorescent sensor based on polymer dots (PDs) probe was developed for the portable on-site determination of copper (Cu²⁺) contamination in aquatic products. Due to the secondary internal filtering effect (IFE) induced by coordination of Cu²⁺ with polyethyleneimine (PEI) moieties on PDs surface, the probe enabled ultrafast (within 5 s) and highly sensitive (limit of detection of 52 nM) detection of Cu²⁺. Furthermore, an integrated sensing array composed of PDs/poly(vinyl alcohol) (PVA) film was developed, allowing high-throughput and simultaneous analysis of multiple aquatic product samples within 1 min. By combining quick-response (QR) code technology with smartphone-assisted data processing, a multidimensional dataset was established, including Cu²⁺ concentration, testing location, and temporal information. The PDs/PVA film-based monitoring platform offers a comprehensive approach for tracking Cu²⁺ contamination in aquatic products and shows great potential for applications in food safety surveillance and quality management.

Graphical abstract