Nanosphere Lithography-Enabled Hybrid Ag-Cu Surface-Enhanced Raman Spectroscopy Substrates with Enhanced Absorption of Excitation Light

Wu, Zixuan1; Liu, Jianxun1,2; Wang, Zhenming1,2; Chen, Lei1,2; Xu, Yiwei1; Ma, Zongjun1,2; Kong, Delai1,2; Luo, Dan1; Liu, Yan Jun1,2

2023-08-01

10.3390/bios13080825

BIOSENSORS-BASEL   影响因子和分区

2079-6374

We demonstrated a low-cost, highly sensitive hybrid Ag-Cu substrate with enhanced absorption for the excitation laser beam via the nanosphere lithography technique. The hybrid Ag-Cu surface-enhanced Raman spectroscopy (SERS) substrate consists of a Cu nanoarray covered with Ag nanoparticles. The geometry of the deposited Cu nanoarray is precisely determined through a self-assembly nanosphere etching process, resulting in optimized absorption for the excitation laser beam. Further Raman enhancement is achieved by incorporating plasmonic hotspots formed by dense Ag nanoparticles, grown by immersing the prepared Cu nanoarray in a silver nitrate solution. The structural design enables analytical enhancement factor of hybrid Ag-Cu SERS substrates of 1.13 x 10(5). The Ag-Cu SERS substrates exhibit a highly sensitive and reproducible SERS activity, with a low detection limit of 10(-13) M for Rhodamine 6G detection and 10(-9) M for 4,4'-Bipyridine. Our strategy could pave an effective and promising approach for SERS-based rapid detection in biosensors, environmental monitoring and food safety.

SERS enhancement factor hot spot self-assembly nanosphere lithography

SCI ; EI

英语

第一 ; 通讯

Chemistry ; Science & Technology - Other Topics ; Instruments & Instrumentation

Chemistry, Analytical ; Nanoscience & Nanotechnology ; Instruments & Instrumentation

WOS:001055828300001

MDPI

20233514655800

Binary alloys ; Copper ; Etching ; Laser beams ; Laser excitation ; Light absorption ; Light transmission ; Lithography ; Metal nanoparticles ; Nanospheres ; Raman spectroscopy ; Silver alloys ; Silver compounds ; Silver nanoparticles ; Substrates

Copper:544.1 ; Precious Metals:547.1 ; Light/Optics:741.1 ; Laser Beam Interactions:744.8 ; Laser Applications:744.9 ; Nanotechnology:761 ; Physical Chemistry:801.4 ; Chemical Reactions:802.2 ; Solid State Physics:933 ; Materials Science:951

Web of Science

1.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Shenzhen Engn Res Ctr High Resolut Light Field Dis, Shenzhen 518055, Peoples R China

Wu, Zixuan,Liu, Jianxun,Wang, Zhenming,et al. Nanosphere Lithography-Enabled Hybrid Ag-Cu Surface-Enhanced Raman Spectroscopy Substrates with Enhanced Absorption of Excitation Light[J]. BIOSENSORS-BASEL,2023,13(8).

Wu, Zixuan.,Liu, Jianxun.,Wang, Zhenming.,Chen, Lei.,Xu, Yiwei.,...&Liu, Yan Jun.(2023).Nanosphere Lithography-Enabled Hybrid Ag-Cu Surface-Enhanced Raman Spectroscopy Substrates with Enhanced Absorption of Excitation Light.BIOSENSORS-BASEL,13(8).

Wu, Zixuan,et al."Nanosphere Lithography-Enabled Hybrid Ag-Cu Surface-Enhanced Raman Spectroscopy Substrates with Enhanced Absorption of Excitation Light".BIOSENSORS-BASEL 13.8(2023).