A novel SERS substrate based on silver nanoparticles-capsulated single porous glass microsphere

2016 IEEE International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO) Pub Date : 2016-07-18 DOI:10.1109/3M-NANO.2016.7824946

Xiaoyan Wen, H. Shuai, Hanzheng Wang, Hai Xiao, Li Min

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引用次数: 1

Abstract

A novel surface-enhanced Raman scattering (SERS) substrate based on silver nanoparticles-capsulated porous glass microsphere (PGM) has been investigated. Ag+ ions were introduced into PGM interior as precursors, during which compressed CO2 gas with 150 psi pressure was employed to increase Ag+ loading capacity. After that Ag+ ions were in situ reduced to form Ag nanoparticles. The synthesized sample was characterized by scanning electron microscopy and energy dispersive spectrometer. As a result Ag nanoparticles encapsulation has been identified. SERS performance was evaluated by Rhodamine 6G and benzoic acid solutions, and obvious Raman enhancement was obtained. The enhancement effect was revealed to be superior to similar substrates, Ag-coated porous and nonporous microsphere prepared via silver mirror reaction. Response of Ag-capsulated PGM and large Ag-coated NPGM to Hg2+ were demonstrated. With the advantages of Raman enhancement, small size, fabrication convenience and operation flexibility, Ag-capsulated PGM is believed to have considerable application prospect in chemical and biological micro-sensor area.

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基于银纳米颗粒的新型SERS衬底-单孔玻璃微球

研究了一种基于银纳米粒子的表面增强拉曼散射(SERS)衬底-多孔玻璃微球(PGM)。将Ag+离子作为前驱体引入PGM内部，在此过程中使用150psi压力的压缩CO2气体来增加Ag+的负载能力。然后原位还原银离子形成银纳米粒子。用扫描电镜和能谱仪对合成的样品进行了表征。结果表明，银纳米颗粒具有包封性。罗丹明6G和苯甲酸溶液对SERS性能进行了评价，得到了明显的拉曼增强。结果表明，该微球的增强效果优于银镜反应制备的镀银多孔微球和无孔微球。研究了ag包覆的PGM和大ag包覆NPGM对Hg2+的响应。ag封装PGM具有拉曼增强、体积小、制作方便、操作灵活等优点，在化学和生物微传感器领域具有广阔的应用前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2016 IEEE International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO)

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