Stable, Flexible, and High-Performance SERS Chip Enabled by a Ternary Film-Packaged Plasmonic Nanoparticle Array,ACS Applied Materials & Interfaces

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Stable, Flexible, and High-Performance SERS Chip Enabled by a Ternary Film-Packaged Plasmonic Nanoparticle Array
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2019-07-18 00:00:00 , DOI: 10.1021/acsami.9b09746
Kaiqiang Wang ₁ , Da-Wen Sun _{1,

2} , Hongbin Pu ₁ , Qingyi Wei ₁ , Lunjie Huang ₁

Affiliation

The high sensitivity and long-term storage stability of a plasmonic substrate are vital for practical applications of the surface-enhanced Raman scattering (SERS) technique in real-world analysis. In this study, a rationally designed, ternary film-packaged, silver-coated gold-nanoparticle ([email protected] NP) plasmonic array was fabricated and applied as a stable and high-performance SERS chip for highly sensitive sensing of thiabendazole (TBZ) residues in fruit juices. The ternary films played different roles in the plasmonic chip: a newborn poly(methyl methacrylate) (PMMA) film serving as a template for fixing the self-assembled closely packed monolayer [email protected] NP array that provided an intensive hot spot, a fluorescent quantitative polymerase chain reaction adhesive film (qPCR film) acting as a carrier to retrieve the [email protected]/PMMA film that was used to improve the robustness of the plasmonic array, and a polyethylene terephthalate (PET) film covered over the [email protected]/PMMA/qPCR film performing as a barrier to improve the stability of the chip. The [email protected]/PMMA/qPCR-PET film chip showed high sensitivity with an enhancement factor of 3.14 × 10⁶, long-term storage stability without changing SERS signals for more than 2 months at room temperatures, and a low limit of detection for sensing TBZ in pear juice (21 ppb), orange juice (43 ppb), and grape juice (69 ppb). In addition, the procedure for fabricating the [email protected]/PMMA/qPCR-PET film SERS chip was easy to handle, offering a new strategy to develop flexible and wearable sensors for on-site monitoring of chemical contaminants with a portable Raman spectrometer in the future.

中文翻译：

三元膜包装的等离激元纳米颗粒阵列实现的稳定，灵活和高性能SERS芯片

等离子体衬底的高灵敏度和长期存储稳定性对于表面增强拉曼散射（SERS）技术在实际分析中的实际应用至关重要。在这项研究中，设计合理设计，三元膜包装，镀银金纳米颗粒（[电子邮件保护] NP）等离子体阵列，并将其用作稳定，高性能的SERS芯片，用于噻苯达唑（TBZ）的高灵敏感测。果汁中的残留物。三元膜在等离子体芯片中扮演着不同的角色：新生的聚甲基丙烯酸甲酯（PMMA）膜用作固定自组装紧密堆积的单层[电子邮件保护] NP阵列的模板，该阵列提供了一个密集的热点，荧光定量聚合酶链反应粘合膜（qPCR膜），作为载体以回收用于改善等离子体阵列坚固性的[受电子邮件保护的] / PMMA膜，以及覆盖在[上]的聚对苯二甲酸乙二酯（PET）膜[电子邮件保护] / PMMA / qPCR膜可作为屏障来提高芯片的稳定性。[受电子邮件保护] / PMMA / qPCR-PET薄膜芯片显示高灵敏度，增强因子为3.14×10⁶，在室温下超过2个月不会改变SERS信号的长期存储稳定性，并且对梨汁（21 ppb），橙汁（43 ppb）和葡萄汁（69 ppb）中TBZ的检测限很低）。此外，[电子邮件保护] / PMMA / qPCR-PET薄膜SERS芯片的制造过程易于操作，为开发灵活的可穿戴式传感器提供了新的策略，该传感器可通过便携式拉曼光谱仪现场监测化学污染物。未来。

更新日期：2019-07-18

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