C. D. Vu, T. Nguyen, T. B. Pham, V. Pham, H. Bui, Thi Hong Hanh Vu, Van Hai Pham
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引用次数: 1
摘要
在这项工作中，制备了由银纳米粒子(AgNPs)覆盖的多孔硅光子晶体(PSi PhCs)作为表面增强拉曼散射(SERS)衬底，用于检测低浓度的亚甲基蓝(MB)。SERS底物对水中MB的检出限为10 \(^{-10}\) mol/L。MB SERS光谱中446 cm \(^{-1}\)和1623 cm \(^{-1}\)峰的SERS信号强度与浓度在10 \(^{-4}\) ～ 10 \(^{-10}\) mol/L范围内的指数函数拟合。这些结果表明，PSi - PhCs衬底上的AgNPs可以应用于环境传感。
Detection of Ultra-Low Concentration of Methylene Blue by Porous Silicon Photonic Crystals Covered With Siver Nanoparticles as Efficient Sers Substrate
In this work, porous silicon photonic crystals (PSi PhCs) covered by silver nanoparticles (AgNPs) were prepared as surface-enhanced Raman scattering (SERS) substrate to detect methylene blue (MB) at low concentrations. The limit of MB detection in water by the SERS substrate is evaluated to be 10\(^{-10}\) mol/L. The SERS signal intensities of 446 cm\(^{-1}\) and 1623 cm\(^{-1}\) peaks in SERS spectra of MB are fit in exponential functions of concentrations ranging from 10\(^{-4}\) to 10\(^{-10}\) mol/L. These results show that the AgNPs on PSi PhCs substrates could be applied in environmental sensing.
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