title: Gold@silver bimetal nanoparticles/pyramidal silicon 3D substrate with high reproducibility for high-performance SERS.
abstract: 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.
authors.affiliation: School of Physics and Electronics, Shandong Normal University, Jinan 250014, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Zhang
authors.affiliation: School of Physics and Electronics, Shandong Normal University, Jinan 250014, China.|State Key Lab of Crystal Materials Shandong University, Jinan 250100, China.
authors.forename: Shou Zhen
authors.initials: SZ
authors.lastname: Jiang
authors.affiliation: School of Physics and Electronics, Shandong Normal University, Jinan 250014, China.
authors.forename: Cheng
authors.initials: C
authors.lastname: Yang
authors.affiliation: School of Physics and Electronics, Shandong Normal University, Jinan 250014, China.
authors.forename: Chong Hui
authors.initials: CH
authors.lastname: Li
authors.affiliation: School of Physics and Electronics, Shandong Normal University, Jinan 250014, China.
authors.forename: Yan Yan
authors.initials: YY
authors.lastname: Huo
authors.affiliation: School of Physics and Electronics, Shandong Normal University, Jinan 250014, China.
authors.forename: Xiao Yun
authors.initials: XY
authors.lastname: Liu
authors.affiliation: School of Physics and Electronics, Shandong Normal University, Jinan 250014, China.
authors.forename: Ai Hua
authors.initials: AH
authors.lastname: Liu
authors.affiliation: School of Physics and Electronics, Shandong Normal University, Jinan 250014, China.
authors.forename: Qin
authors.initials: Q
authors.lastname: Wei
authors.affiliation: School of Physics and Electronics, Shandong Normal University, Jinan 250014, China.
authors.forename: Sai Sai
authors.initials: SS
authors.lastname: Gao
authors.affiliation: School of Science, Qilu University of Technology, Jinan 250353, China.
authors.forename: Xing Guo
authors.initials: XG
authors.lastname: Gao
authors.affiliation: School of Physics and Electronics, Shandong Normal University, Jinan 250014, China.
authors.forename: Bao Yuan
authors.initials: BY
authors.lastname: Man