有序排列的不同直径单层聚苯乙烯胶体晶体上的 Ag 半壳：一种超灵敏且可重现的 SERS 基底。
Ordered array of Ag semishells on different diameter monolayer polystyrene colloidal crystals: An ultrasensitive and reproducible SERS substrate.
机构信息
Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621900, China.
Co-Innovation Center for Energetic Materials, Southwest University of Science and Technology, Mianyang 621900, China.
出版信息
Sci Rep. 2016 Sep 2;6:32314. doi: 10.1038/srep32314.
Ag semishells (AgSS) ordered arrays for surface-enhanced Raman scattering (SERS) spectroscopy have been prepared by depositing Ag film onto polystyrene colloidal particle (PSCP) monolayer templates array. The diversified activity for SERS activity with the ordered AgSS arrays mainly depends on the PSCP diameter and Ag film thickness. The high SERS sensitivity and reproducibility are proved by the detection of rhodamine 6G (R6G) and 4-aminothiophenol (4-ATP) molecules. The prominent enhancements of SERS are mainly from the "V"-shaped or "U"-shaped nanogaps on AgSS, which are experimentally and theoretically investigated. The higher SERS activity, stability and reproducibility make the ordered AgSS a promising choice for practical SERS low concentration detection applications.
银半壳（AgSS）有序阵列已通过将 Ag 膜沉积到聚苯乙烯胶体颗粒（PSCP）单层模板阵列上制备。表面增强拉曼散射（SERS）光谱的 AgSS 有序阵列具有多样化的 SERS 活性，主要取决于 PSCP 直径和 Ag 膜厚度。通过检测罗丹明 6G（R6G）和 4-巯基苯胺（4-ATP）分子，证明了 AgSS 具有高的 SERS 灵敏度和重现性。SERS 的显著增强主要来自 AgSS 上的“V”形或“U”形纳米间隙，这在实验和理论上都进行了研究。更高的 SERS 活性、稳定性和重现性使有序 AgSS 成为实际 SERS 低浓度检测应用的有前途的选择。
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