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Flexible Sponge Surface Enhances Raman Scattering (SERS) Substrate with Patterned Superwettability for Ultrasensitive Pesticide Detection
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2024-04-26 , DOI: 10.1021/acsanm.4c01400 Hui Zhang 1 , Xia Deng 1 , Junrong Fu 1 , Ye Chen 1 , Shiwei Jin 1
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2024-04-26 , DOI: 10.1021/acsanm.4c01400 Hui Zhang 1 , Xia Deng 1 , Junrong Fu 1 , Ye Chen 1 , Shiwei Jin 1
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Surface-enhanced Raman scattering (SERS) has been widely applied in the field of food safety due to its exceptional molecular recognition capabilities. In this study, a simple method for preparing a flexible SERS substrate was designed for the ultrasensitive real-time detection of the banned drugs malachite green (MG) and crystal violet (CV). The substrate was prepared by patterned spraying of a superhydrophobic coating prepared from candle soot onto the surface of a poly(vinyl alcohol) (PVA) sponge, followed by simple Ag nanoparticle (Ag NP) deposition in the superhydrophilic region. The PVA sponge with special hydrophilicity can completely absorb the droplets to be measured within 1–5 s without additional drying treatment. And the Ag NPs aggregated by potassium iodide (KI) resulted in a significant enhancement of the Raman signal, enabling the substrate to realize the detection of MG and CV as low as 100 fg/mL (2.74 × 10–13 M) and 1 pg/mL (2.45 × 10–12 M), respectively, with a long lifetime (90 days). Thanks to the excellent mechanical properties of the flexible substrate, the substrate can realize the simultaneous detection of very small amounts of MG and CV on the surface of crayfish by simple wiping, which has great application prospects in the field of food safety and field inspection.
中文翻译：
柔性海绵表面增强拉曼散射 (SERS) 基板，具有图案化超润湿性，用于超灵敏农药检测
表面增强拉曼散射（SERS）由于其卓越的分子识别能力，在食品安全领域得到了广泛的应用。本研究设计了一种制备柔性SERS基底的简单方法，用于超灵敏实时检测违禁药物孔雀石绿（MG）和结晶紫（CV）。该基底的制备方法是将蜡烛烟灰制备的超疏水涂层图案化喷涂到聚乙烯醇（PVA）海绵的表面上，然后在超亲水区域沉积简单的银纳米颗粒（Ag NP）。具有特殊亲水性的PVA海绵可以在1-5秒内完全吸收待测液滴，无需额外干燥处理。碘化钾（KI）聚集的Ag NPs导致拉曼信号显着增强，使得底物能够实现低至100 fg/mL（2.74 × 10 –13 M）和1 pg的MG和CV的检测/mL (2.45 × 10 –12 M)，分别具有较长的寿命（90 天）。得益于柔性基板优异的机械性能，该基板通过简单的擦拭即可实现小龙虾表面极微量的MG和CV的同时检测，在食品安全和现场检测领域具有巨大的应用前景。
更新日期：2024-04-26
中文翻译：
柔性海绵表面增强拉曼散射 (SERS) 基板，具有图案化超润湿性，用于超灵敏农药检测
表面增强拉曼散射（SERS）由于其卓越的分子识别能力，在食品安全领域得到了广泛的应用。本研究设计了一种制备柔性SERS基底的简单方法，用于超灵敏实时检测违禁药物孔雀石绿（MG）和结晶紫（CV）。该基底的制备方法是将蜡烛烟灰制备的超疏水涂层图案化喷涂到聚乙烯醇（PVA）海绵的表面上，然后在超亲水区域沉积简单的银纳米颗粒（Ag NP）。具有特殊亲水性的PVA海绵可以在1-5秒内完全吸收待测液滴，无需额外干燥处理。碘化钾（KI）聚集的Ag NPs导致拉曼信号显着增强，使得底物能够实现低至100 fg/mL（2.74 × 10 –13 M）和1 pg的MG和CV的检测/mL (2.45 × 10 –12 M)，分别具有较长的寿命（90 天）。得益于柔性基板优异的机械性能，该基板通过简单的擦拭即可实现小龙虾表面极微量的MG和CV的同时检测，在食品安全和现场检测领域具有巨大的应用前景。
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