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Wu Z, Liu J, Wang Z, Chen L, Xu Y, Ma Z, Kong D, Luo D, Liu YJ. Nanosphere Lithography-Enabled Hybrid Ag-Cu Surface-Enhanced Raman Spectroscopy Substrates with Enhanced Absorption of Excitation Light. BIOSENSORS 2023; 13:825. [PMID: 37622911 PMCID: PMC10452600 DOI: 10.3390/bios13080825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 08/15/2023] [Accepted: 08/15/2023] [Indexed: 08/26/2023]
Abstract
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 × 105. 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.
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Affiliation(s)
- Zixuan Wu
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China; (Z.W.); (Z.W.); (L.C.); (Y.X.); (Z.M.); (D.K.); (D.L.)
| | - Jianxun Liu
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China; (Z.W.); (Z.W.); (L.C.); (Y.X.); (Z.M.); (D.K.); (D.L.)
- Shenzhen Engineering Research Center for High Resolution Light Field Display and Technology, Southern University of Science and Technology, Shenzhen 518055, China
| | - Zhenming Wang
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China; (Z.W.); (Z.W.); (L.C.); (Y.X.); (Z.M.); (D.K.); (D.L.)
- Shenzhen Engineering Research Center for High Resolution Light Field Display and Technology, Southern University of Science and Technology, Shenzhen 518055, China
| | - Lei Chen
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China; (Z.W.); (Z.W.); (L.C.); (Y.X.); (Z.M.); (D.K.); (D.L.)
- Shenzhen Engineering Research Center for High Resolution Light Field Display and Technology, Southern University of Science and Technology, Shenzhen 518055, China
| | - Yiwei Xu
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China; (Z.W.); (Z.W.); (L.C.); (Y.X.); (Z.M.); (D.K.); (D.L.)
| | - Zongjun Ma
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China; (Z.W.); (Z.W.); (L.C.); (Y.X.); (Z.M.); (D.K.); (D.L.)
- Shenzhen Engineering Research Center for High Resolution Light Field Display and Technology, Southern University of Science and Technology, Shenzhen 518055, China
| | - Delai Kong
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China; (Z.W.); (Z.W.); (L.C.); (Y.X.); (Z.M.); (D.K.); (D.L.)
- Shenzhen Engineering Research Center for High Resolution Light Field Display and Technology, Southern University of Science and Technology, Shenzhen 518055, China
| | - Dan Luo
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China; (Z.W.); (Z.W.); (L.C.); (Y.X.); (Z.M.); (D.K.); (D.L.)
| | - Yan Jun Liu
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China; (Z.W.); (Z.W.); (L.C.); (Y.X.); (Z.M.); (D.K.); (D.L.)
- Shenzhen Engineering Research Center for High Resolution Light Field Display and Technology, Southern University of Science and Technology, Shenzhen 518055, China
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Yu J, Wu J, Yang H, Li P, Liu J, Wang M, Pang J, Li C, Yang C, Xu K. Extremely Sensitive SERS Sensors Based on a Femtosecond Laser-Fabricated Superhydrophobic/-philic Microporous Platform. ACS APPLIED MATERIALS & INTERFACES 2022; 14:43877-43885. [PMID: 36101984 DOI: 10.1021/acsami.2c10381] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The detection of molecules from highly diluted solutions with a limited amount is vital for precancer diagnosis, food safety, and forensic analysis. The sensitivity and convenience of detection techniques are the primary concerns. In this study, a hybrid superhydrophobic/-philic (SH/SHL) microporous platform is designed and fabricated by a femtosecond laser to improve surface-enhanced Raman scattering (SERS) performances. Relying on the micropores fabricated at the center of SHL patterns, sediments distributed at the central regions are avoided, leading to the further enrichment of the target molecules. The engineered micropores with high identification further improve the speed of Raman tests, and the fabricated SERS substrate shows an advantage in outdoor handheld detection and automated inspection applications. The optimized SERS sensor is sufficient for attomolar-level detection (10-17 M) of rhodamine 6G using analyte volumes of just 5 μL, corresponding to an enhancement factor of 5.19 × 1013. Meanwhile, a relative standard deviation of 7.48% at 10-10 M shows the excellent uniformity of this proposed SERS platform. This work further pushes forward the practical applications of SERS technology in ultratrace molecular detections.
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Affiliation(s)
- Jian Yu
- Sino-German College of Intelligent Manufacturing, Shenzhen Technology University, Shenzhen 518118, China
- Wenzhou University Pingyang Institute and Intelligent Manufacturing, Wenzhou 325035, China
| | - Jiangen Wu
- Sino-German College of Intelligent Manufacturing, Shenzhen Technology University, Shenzhen 518118, China
| | - Huan Yang
- Sino-German College of Intelligent Manufacturing, Shenzhen Technology University, Shenzhen 518118, China
| | - Pei Li
- College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, China
| | - Jing Liu
- College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, China
| | - Meng Wang
- Sino-German College of Intelligent Manufacturing, Shenzhen Technology University, Shenzhen 518118, China
| | - Jihong Pang
- College of Business, Shaoxing University, Shaoxing 312000, Zhejiang, China
| | - Chunbo Li
- Sino-German College of Intelligent Manufacturing, Shenzhen Technology University, Shenzhen 518118, China
| | - Can Yang
- Sino-German College of Intelligent Manufacturing, Shenzhen Technology University, Shenzhen 518118, China
| | - Kaichen Xu
- State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
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Wang BX, Duan G, Xu W, Xu C, Jiang J, Yang Z, Wu Y, Pi F. Flexible surface-enhanced Raman scatting substrates: recent advances in their principles, design strategies, diversified material selections and applications. Crit Rev Food Sci Nutr 2022; 64:472-516. [PMID: 35930338 DOI: 10.1080/10408398.2022.2106547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Surface-enhanced Raman scattering (SERS) is widely used as a powerful analytical technology in cutting-edge areas such as food safety, biology, chemistry, and medical diagnosis, providing ultra-fast, ultra-sensitive, nondestructive characterization and achieving ultra-high detection sensitivity even down to the single-molecule level. Development of Raman spectroscopy is strongly dependent on high-performance SERS substrates, which have long evolved from the early days of rough metal electrodes to periodic nanopatterned arrays building on solid supporting substrates. For rigid SERS substrates, however, their applications are restricted by sophisticated pretreatments for detecting solid samples with non-planar surfaces. It is therefore essential to reassert the principles in constructing flexible SERS substrates. Herein, we comprehensively review the state-of-the-art in understanding, preparing and using flexible SERS. The basic mechanisms behind the flexible SERS are briefly outlined, typical design strategies are highlighted and diversified selection of materials in preparing flexible SERS substrates are reviewed. Then the recent achievements of various interdisciplinary applications based on flexible SERS substrates are summarized. Finally, the challenges and perspectives for future evolution of flexible SERS and their applications are demonstrated. We propose new research directions focused on stimulating the real potential of SERS as an advanced analytical technique for commercialization.
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Affiliation(s)
- Ben-Xin Wang
- School of Science, Jiangnan University, Wuxi, China
| | - Guiyuan Duan
- School of Science, Jiangnan University, Wuxi, China
| | - Wei Xu
- School of Science, Jiangnan University, Wuxi, China
| | - Chongyang Xu
- School of Science, Jiangnan University, Wuxi, China
| | | | | | - Yangkuan Wu
- School of Science, Jiangnan University, Wuxi, China
| | - Fuwei Pi
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
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