Beihang University, School of Chemistry, Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, Beijing 100191, China.
Beihang University, School of Chemistry, Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, Beijing 100191, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2018 Sep 5;202:376-381. doi: 10.1016/j.saa.2018.05.068. Epub 2018 May 17.
Flexible substrates have been proposed for daily-life applications in SERS detection due to the prominent sample collection properties such as they can be wrapped around non-planar object surface. Combining the noble metals with polymers, flexible SERS substrates could be fabricated with advantages of light weight, transparency and high SERS sensitivity. Herein, we prepare a gold nanorods (AuNRs)/poly(methyl methacrylate) (PMMA) film as flexible SERS substrate by self-assembling a uniformly AuNRs array layer on PMMA template. This AuNRs/PMMA film performs excellently on thiram trace detection with the lowest detection concentration of 0.5 ppb. The fabricated substrates were applied for practical detection with cucumber by directly covering the AuNRs/PMMA flexible film on the target surface. Furthermore, the high SERS sensitivity as well as great reproducibility present a wide range of prospections for the further application of non-plane surface.
由于柔性基底具有突出的样品采集特性，如可以包裹在非平面物体表面上，因此被提议用于 SERS 检测的日常生活应用。将贵金属与聚合物结合，可制备具有重量轻、透明度高和高 SERS 灵敏度等优点的柔性 SERS 基底。在此，我们通过在 PMMA 模板上自组装均匀的 AuNRs 阵列层来制备金纳米棒（AuNRs）/聚甲基丙烯酸甲酯（PMMA）薄膜作为柔性 SERS 基底。该 AuNRs/PMMA 薄膜在检测马拉硫磷方面表现出色，最低检测浓度为 0.5 ppb。所制备的基底应用于实际检测，通过直接将 AuNRs/PMMA 柔性薄膜覆盖在目标表面上进行检测。此外，高灵敏度以及良好的重现性为进一步应用于非平面表面提供了广泛的前景。
