具有高重现性的用于高性能表面增强拉曼光谱的金@银双金属纳米颗粒/金字塔形硅三维基底
Gold@silver bimetal nanoparticles/pyramidal silicon 3D substrate with high reproducibility for high-performance SERS.
作者信息
Zhang Chao, Jiang Shou Zhen, Yang Cheng, Li Chong Hui, Huo Yan Yan, Liu Xiao Yun, Liu Ai Hua, Wei Qin, Gao Sai Sai, Gao Xing Guo, Man Bao Yuan
机构信息
School of Physics and Electronics, Shandong Normal University, Jinan 250014, China.
State Key Lab of Crystal Materials Shandong University, Jinan 250100, China.
出版信息
Sci Rep. 2016 May 4;6:25243. doi: 10.1038/srep25243.
A novel and efficient surface enhanced Raman scattering (SERS) substrate has been presented based on Gold@silver/pyramidal silicon 3D substrate (Au@Ag/3D-Si). By combining the SERS activity of Ag, the chemical stability of Au and the large field enhancement of 3D-Si, the Au@Ag/3D-Si substrate possesses perfect sensitivity, homogeneity, reproducibility and chemical stability. Using R6G as probe molecule, the SERS results imply that the Au@Ag/3D-Si substrate is superior to the 3D-Si, Ag/3D-Si and Au/3D-Si substrate. We also confirmed these excellent behaviors in theory via a commercial COMSOL software. The corresponding experimental and theoretical results indicate that our proposed Au@Ag/3D-Si substrate is expected to develop new opportunities for label-free SERS detections in biological sensors, biomedical diagnostics and food safety.
基于金@银/金字塔形硅三维基底（Au@Ag/3D-Si），提出了一种新型高效的表面增强拉曼散射（SERS）基底。通过结合银的SERS活性、金的化学稳定性和三维硅的大场增强特性，Au@Ag/3D-Si基底具有优异的灵敏度、均匀性、重现性和化学稳定性。以罗丹明6G（R6G）作为探针分子，SERS结果表明Au@Ag/3D-Si基底优于三维硅、Ag/3D-Si和Au/3D-Si基底。我们还通过商业COMSOL软件从理论上证实了这些优异性能。相应的实验和理论结果表明，我们提出的Au@Ag/3D-Si基底有望为生物传感器、生物医学诊断和食品安全中的无标记SERS检测开辟新机遇。
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