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<p>A scalable strategy for in-situ growth of silver nanoparticles (AgNPs) on flexible polydimethylsiloxane (PDMS) films to construct a highly sensitive AgNPs@PDMS surface-enhanced Raman scattering (SERS) substrate for the determination of malachite green is proposed. The substrate exhibits excellent uniformity and performance, with an enhancement factor of 4.5 × 10<sup>7</sup> for 4-mercaptobenzoic acid&#xa0;(4-MBA) and a detection limit of 10<sup>− 11</sup> M. Moreover, it can detect malachite green in aquaculture wastewater and on irregular aquatic surfaces. Its strong linear correlation between SERS intensity and logarithmic concentration indicates good quantitative potential. UV-vis spectroscopy and spike-recovery experiments further verify its reliability. The AgNPs@PDMS substrate thus offers a reliable and promising platform for rapid on-site detection of illegal additives in aquaculture.</p> Graphical abstract <p></p>

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Highly transparent, stretchable and flexible SERS sensor for rapid and in-situ detection of malachite green in aquaculture

  • 期刊论文

  • 发表日期：

    2026年4月22日

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  • Jie Ao,
  • Yunfeng Yao,
  • Shengtian Wu,
  • Chunjian Wu,
  • Yao Li,
  • Long Wu,
  • Shouxiang Jiang,
  • Sihang Zhang

摘要

A scalable strategy for in-situ growth of silver nanoparticles (AgNPs) on flexible polydimethylsiloxane (PDMS) films to construct a highly sensitive AgNPs@PDMS surface-enhanced Raman scattering (SERS) substrate for the determination of malachite green is proposed. The substrate exhibits excellent uniformity and performance, with an enhancement factor of 4.5 × 107 for 4-mercaptobenzoic acid (4-MBA) and a detection limit of 10− 11 M. Moreover, it can detect malachite green in aquaculture wastewater and on irregular aquatic surfaces. Its strong linear correlation between SERS intensity and logarithmic concentration indicates good quantitative potential. UV-vis spectroscopy and spike-recovery experiments further verify its reliability. The AgNPs@PDMS substrate thus offers a reliable and promising platform for rapid on-site detection of illegal additives in aquaculture.

Graphical abstract