双重功能的PDMS辅助纸基SERS平台，可可靠地检测水果表面和果汁中的硫胺素残留。,Analytical Methods

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双重功能的PDMS辅助纸基SERS平台，可可靠地检测水果表面和果汁中的硫胺素残留。
Analytical Methods ( IF 2.7 ) Pub Date : 2020-04-23 , DOI: 10.1039/d0ay00483a
Shuang Lin _{1,

2} , Wuliji Hasi ₁ , Siqingaowa Han _{1,

3} , Xiang Lin ₂ , Li Wang ₂

Affiliation

在这项工作中，通过借助疏水性聚二甲基硅氧烷（PDMS）制成的纸基SERS基底，可有效，可靠地测量水果表面和果汁中的锡兰。特别是，纸基SERS基材是通过涂覆核-壳Au @ Ag纳米棒单层涂层制成的，与多层吸附相比，SERS性能得到了优化。此外，通过使用聚甲基丙烯酸甲酯（PMMA）胶带将纸基基材反向简单地粘贴到PDMS上，可以构建通用的SERS平台。一方面，该检测平台由于PDMS的优异疏水性而能够实现样品富集，从而提高了测量的灵敏度，并且通过鉴定橙汁中的硫胺素成功地展示了其功能。另一方面，PDMS也可以起辅助作用，而反向粘附在PDMS上的纸质基材可以在没有纳米颗粒的情况下提取侧面样品，从而极大地避免了对基材上纳米颗粒的损坏。因此，分析的准确性得到了显着提高，并基于此功能证明了对橘子表面的硫胺素的检测。因此，该提议的SERS平台为准备用于食品安全领域中化学污染物现场监控的多功能SERS传感器提供了一种新策略。分析的准确性得到了显着提高，并基于此功能证明了对橘子表面的硫胺素的检测。因此，该提议的SERS平台为准备用于食品安全领域中化学污染物现场监控的多功能SERS传感器提供了一种新策略。分析的准确性得到了显着提高，并基于此功能证明了对橘子表面的硫胺素的检测。因此，该提议的SERS平台为准备用于食品安全领域中化学污染物现场监控的多功能SERS传感器提供了一种新策略。

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A dual-functional PDMS-assisted paper-based SERS platform for the reliable detection of thiram residue both on fruit surfaces and in juice.

In this work, a dual-functional SERS platform was developed via a paper-based SERS substrate with the aid of hydrophobic polydimethylsiloxane (PDMS) for effective and reliable measurements of thiram on fruit surfaces and in juice. Specifically, the paper-based SERS substrate was fabricated by coating with a core–shell Au@Ag nanorod monolayer, and the SERS performance was optimized compared with multilayer adsorption. Moreover, a versatile SERS platform was constructed by simply pasting the paper-based substrate in reverse onto PDMS using polymethyl methacrylate (PMMA) tape. On the one hand, this detection platform was able to realize sample enrichment due to the excellent hydrophobicity of PDMS, thereby increasing the sensitivity of measurements, and its function was successfully displayed through the identification of thiram in orange juice. On the other hand, PDMS could also play a supporting role and the paper-based substrate reversely stuck on PDMS was able to extract samples on the side without nanoparticles, which greatly avoids damage to nanoparticles on the substrate. Therefore, the accuracy of analysis was significantly improved and the inspection of thiram on the surface of an orange was demonstrated based on this function. As a result, this proposed SERS platform provides a new strategy for preparing multifunctional SERS sensors for the on-site monitoring of chemical contaminants in the food-safety field.

更新日期：2020-04-23

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