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Tao G, Li J, Mu Y, Zhang X. A Three-Dimensional Hydrophobic Surface-Enhanced Raman Scattering Sensor via a Silver-Coated Polytetrafluoroethylene Membrane for the Direct Trace Detection of Molecules in Water. BIOSENSORS 2024; 14:88. [PMID: 38392007 PMCID: PMC10886991 DOI: 10.3390/bios14020088] [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: 12/19/2023] [Revised: 01/22/2024] [Accepted: 01/25/2024] [Indexed: 02/24/2024]
Abstract
We report a three-dimensional (3D) SERS substrate consisting of a silver nanoparticle (AgNP) coating on the skeleton-fiber surfaces of a polytetrafluoroethylene (PTFE) membrane. Simple thermal evaporation was employed to deposit Ag onto the PTFE membrane to produce grape-shaped AgNPs. The 3D-distributed AgNPs exhibit not only strong localized surface plasmon resonance (LSPR) but also strong hydrophobic performance. High-density hotspots via silver nano-grape structures and nanogaps, the large 3D interaction volume, and the large total surface area, in combination with the hydrophobic enrichment of the specimen, facilitate high-sensitivity sensing performance of such a SERS substrate for the direct detection of low-concentration molecules in water. An enhancement factor of up to 1.97 × 1010 was achieved in the direct detection of R6G molecules in water with a concentration of 10-13 mol/L. The lowest detection limit of 100 ppt was reached in the detection of melamine in water. Such a SERS sensor may have potential applications in food-safety control, environmental water pollution monitoring, and biomedical analysis.
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Affiliation(s)
- Guanwei Tao
- Institute of Information Photonics Technology, Beijing University of Technology, Beijing 100124, China
| | - Jiajun Li
- Institute of Information Photonics Technology, Beijing University of Technology, Beijing 100124, China
| | - Yunyun Mu
- Institute of Information Photonics Technology, Beijing University of Technology, Beijing 100124, China
| | - Xinping Zhang
- Institute of Information Photonics Technology, Beijing University of Technology, Beijing 100124, China
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2
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Chin-Heng L, Chun-Hung T, Ding-Zheng L. Optimization of physical vapor deposition process for low background nanoimprinted SERS substrate in quantitative melamine analysis. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 306:123563. [PMID: 37890325 DOI: 10.1016/j.saa.2023.123563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 10/01/2023] [Accepted: 10/18/2023] [Indexed: 10/29/2023]
Abstract
Uniformity, sensitivity, reproducibility, and cost are the critical parameters of practical surface-enhanced-Raman-spectroscopy (SERS) substrates. Herein, we proposed a High-Aspect-Ratio-Nano-Pillar-Array (HARNPA) substrate deposited silver by physical vapor deposition (PVD) methods (e.g. E-beam evaporation, sputtering, and a two-stage intermittent sputtering) to fabricate high-performance SERS substrates. The substrate by the E-beam evaporation has a significant SERS effect, but the Raman background induced by the exposure of the polymer HARNPA limits the analyte choice. The substrate by the sputtering method has better step coverage of silver but a lower enhancement factor. Therefore, we proposed a process of two-stage intermittent sputtering to solve these limitations. In addition, we define a factor called the signal-to-background peak ratio (S/B peak ratio) to evaluate the influence of the Raman background from the SERS substrate. Finally, we accomplished a SERS substrate with an S/B peak ratio of 3.48 by intermittent sputtering, which has the best linearity (R2 = 0.97) of the melamine concentration curve and the lowest detection limit (LoD = 5.6 × 10-7 M) that meets the regulatory requirements for melamine detection (3.96 × 10-6 M). The benefits of our SERS substrates are easy fabrication, high sensitivity (EF = 1.44 × 107), high reproducibility (CV = 8.4 %), and excellent uniformity (CV = 7 % in 4″ area), which are beneficial for mass production in the future.
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Affiliation(s)
- Lee Chin-Heng
- Department of Mechanical Engineering, National Taiwan University of Science and Technology, Taiwan, ROC
| | - Tsai Chun-Hung
- Department of Mechanical Engineering, National Taiwan University of Science and Technology, Taiwan, ROC
| | - Lin Ding-Zheng
- Department of Mechanical Engineering, National Taiwan University of Science and Technology, Taiwan, ROC.
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3
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Qin Y, Tian X, Wang H, Guo X, Wen Y, Yang H. Magnetic ZnFe 2O 4 composite advances SERS assay for Patent blue V. Anal Chim Acta 2023; 1283:341896. [PMID: 37977770 DOI: 10.1016/j.aca.2023.341896] [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] [Received: 06/16/2023] [Revised: 08/31/2023] [Accepted: 10/09/2023] [Indexed: 11/19/2023]
Abstract
BACKGROUND Patent blue V (PbV) an Azo colorant because of its high toxicity to children has been severely limited in food industry. However, frequently the abuse of PbV in some artificial foods is still exposed by media. Current methods for the detection of PbV have to perform tedious pre-processing and the detection sensitivity and speed are required to be further improved. RESULTS In this work, we immobilize gold nanoparticles (Au NPs) on the surface of ZnFe2O4 with aid of Inositol hexaphosphate (IP6) to prepare a novel magnetic surface-enhanced Raman scattering (SERS) substrate (designated as ZnFe2O4-IP6-Au NPs) for rapid detection of PbV in beverages. Synergistic effect of magnetic enrichment, magnetic inducing improvement effect (MIIE) and efficient charge transfer (CT) enables ZnFe2O4-IP6-Au NPs-based SERS assay to achieve limit of detection of PbV down to 1.31 × 10-8 mol/L and a concentration linear relationship ranging from 8.6 × 10-4 to 8.6 × 10-8 mol/L. The detection recoveries for PbV in beverages locate in the range from 98.1 to 102.5 %, meaning the feasibility of method. In addition, the presence of IP6 protection greatly improves the storage stability of ZnFe2O4-IP6-Au NPs. SIGNIFICANCE ZnFe2O4-IP6-Au NPs substrates with excellent SERS performance could on-site, rapidly and sensitively detect PbV. As a perspective, magnetic-composite-based SERS assay has great scenario in food safety by using portable Raman spectrometer.
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Affiliation(s)
- Yun Qin
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai, 200234, China
| | - Xin Tian
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai, 200234, China
| | - Hanyu Wang
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai, 200234, China
| | - Xiaoyu Guo
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai, 200234, China
| | - Ying Wen
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai, 200234, China
| | - Haifeng Yang
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai, 200234, China.
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Lei Y, Xia Y, Wang C, Wang M, Liu R, Li S, Zhang S, Sun Q, Chen W, Wan F. 4-ATP-modified CNTs@NiO-Fe 2O 3-Ag SERS filter membrane for rapid in-situ detection of furfural in mineral oil. Talanta 2023; 265:124796. [PMID: 37385187 DOI: 10.1016/j.talanta.2023.124796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 06/02/2023] [Accepted: 06/07/2023] [Indexed: 07/01/2023]
Abstract
Evaluating the transformer aging state and detecting multi-aging characteristics in transformer oil with high sensitivity and fast speed has become a key challenge. This study introduces a P-N heterojunction (CNTs@NiO-α-Fe2O3) fabricated through electroless nickel plating and a one-step hydrothermal method. Additionally, silver nanoparticles (AgNPs) with adjustable particle sizes are grown on the surface using a chemical reduction method. To obtain high sensitivity and rapid SERS signal, CNTs@NiO-α-Fe2O3-Ag gel is adsorbed on a disposable needle filter (220 nm) surface, and 4-aminothiophene (4-ATP) is grafted onto the surface of SERS substrate. The minimum detection limit was 0.025 mg/L (EF = 5.22 × 104), and the response time of SERS best signal could be shortened to 3 min. Density functional theory (DFT) calculations reveal that by constructing a P-N heterostructure of NiO-Fe2O3 and assessing the adsorption energies of furfural, acetone, and methanol on the surface of the P-N heterojunction. This SERS strategy has a huge application prospect in the aging diagnosis of oil-paper insulation systems in a transformer.
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Affiliation(s)
- Yu Lei
- School of Electrical Engineering, Chongqing University, Chongqing, 400044, PR China; State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing, 400044, PR China
| | - Yaoyang Xia
- School of Electrical Engineering, Chongqing University, Chongqing, 400044, PR China
| | - Changding Wang
- School of Electrical Engineering, Chongqing University, Chongqing, 400044, PR China
| | - Mingliang Wang
- School of Electrical Engineering, Chongqing University, Chongqing, 400044, PR China
| | - Ruiqi Liu
- School of Electrical Engineering, Chongqing University, Chongqing, 400044, PR China
| | - Shufan Li
- School of Electrical Engineering, Chongqing University, Chongqing, 400044, PR China
| | - Sida Zhang
- School of Electrical Engineering, Chongqing University, Chongqing, 400044, PR China
| | - Qiuxia Sun
- Shandong Taikai Transformer Co. LTD China
| | - Weigen Chen
- School of Electrical Engineering, Chongqing University, Chongqing, 400044, PR China; State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing, 400044, PR China
| | - Fu Wan
- School of Electrical Engineering, Chongqing University, Chongqing, 400044, PR China; State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing, 400044, PR China.
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Ghanati K, Eghbaljoo H, Akbari N, Mazaheri Y, Aghebat-Bekheir S, Mahmoodi B, Zandsalimi F, Basaran B, Sadighara P. Determination of melamine contamination in milk with various packaging: a risk assessment study. ENVIRONMENTAL MONITORING AND ASSESSMENT 2023; 195:1095. [PMID: 37626272 DOI: 10.1007/s10661-023-11737-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 08/17/2023] [Indexed: 08/27/2023]
Abstract
Melamine is one type of monomer used as starting substance in manufacturing packaging lining in many countries worldwide. Environmental and food contamination is an issue constantly discussed. In the present study, the melamine content in milk samples with three package types was measured by HPLC/UV. Melamine is not a lipophilic compound. Therefore, the selected samples were low-fat milk. The melamine content in various packaged milk, including packet, polyethylene bags, and plastic packaging, is 790 ± 39.8, 50.7 ± 13, and 57.7 ± 24.54 ppb, respectively. According to the existing standards, the measured values in all the milk samples were lower than the permitted limits. The risk assessment for adults and children showed that the HQ value for both age groups was less than 1. Therefore, milk consumption will not pose a health risk in terms of contamination with melamine.
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Affiliation(s)
- Kiandokht Ghanati
- Department of Food Science and Technology, National Nutrition and Food Technology Research Institute (NNFTRI) and Food Safety Research Center, Shahid Beheshti University of Medical Sciences, Iran, Tehran
| | - Hadi Eghbaljoo
- Department of Environmental Health, Food Safety Division, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Nader Akbari
- Department of Environmental Health, Food Safety Division, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Yeganeh Mazaheri
- Department of Environmental Health, Food Safety Division, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Saeed Aghebat-Bekheir
- Department of Toxicology & Pharmacology, School of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Babak Mahmoodi
- Department of Environmental Health, Food Safety Division, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Farshid Zandsalimi
- Department of Molecular Medicine, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Burhan Basaran
- Department of Nutrition and Dietetics, Faculty of Health, Recep Tayyip Erdogan University, Rize, Turkey
| | - Parisa Sadighara
- Department of Environmental Health, Food Safety Division, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
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Can DFT Calculations Provide Useful Information for SERS Applications? MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020573. [PMID: 36677634 PMCID: PMC9861783 DOI: 10.3390/molecules28020573] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/21/2022] [Accepted: 01/03/2023] [Indexed: 01/09/2023]
Abstract
Density functional theory (DFT) calculations allow us to reproduce the SERS (surface-enhanced Raman scattering) spectra of molecules adsorbed on nanostructured metal surfaces and extract the most information this spectroscopy is potentially able to provide. The latter point mainly concerns the anchoring mechanism and the bond strength between molecule and metal as well as the structural and electronic modifications of the adsorbed molecule. These findings are of fundamental importance for the application of this spectroscopic technique. This review presents and discusses some SERS-DFT studies carried out in Italy as a collaboration between the universities of Modena and Reggio-Emilia and of Florence, giving an overview of the information that we can extract with a combination of experimental SERS spectra and DFT modeling. In addition, a selection of the most recent studies and advancements on the DFT approach to SERS spectroscopy is reported with commentary.
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Zhao X, Zhang L, Lv X, Liu J, Liu X, Zhang Y, Zhang D, Li S, Wang Q. Large-area fluorescence enhancement of R6G based on a uniform PVA-Au plasmonic substrate. OPTICS EXPRESS 2022; 30:43281-43292. [PMID: 36523029 DOI: 10.1364/oe.472908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 10/27/2022] [Indexed: 06/17/2023]
Abstract
With the development of surface enhanced fluorescence (SEF) spectroscopy technology, uniform and low-cost SEF substrate is urgently needed. In this paper, the nanocomposite films of poly (vinyl alcohol) (PVA) embedded with in-situ Au particles, their localized surface plasmon resonance (LSPR) bands locate at different wavelengths from 525 nm to 569 nm, were used as substrates to enhance the fluorescence of rhodamine 6 G (R6G). The results shows that the uniform light emission in large area can be measured, and the maximum enhancement factor (EF) is about 13 folds. With increasing concentration of R6G films, the EF first increases and then slowly decreases. It is demonstrated that the EF greatly depends on the matching degree of the emission/excitation of R6G and the LSPR band of PVA-Au substrate. All the results further suggests that the PVA-Au substrate not only realize the fluorescence enhancement but also attenuates the fluorescence quenching at higher concentration. In addition, the local electric distribution of the substrate is simulated by using three-dimensional finite different time-domain (FDTD) to further demonstrate the mechanism of the SEF. This substrate has good development prospects in the fields of fluorescent probes and fluorescence imaging, which can be beneficial to the development of uniform and low-cost SEF substrate.
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8
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Tang C, Park E, Guo S, Jin S, Zhao L, Chen L, Jung YM. Evaluation of SERS activity for cosputtered Ag-ZnX@PS (X = O, S, Se) composites: Carrier density dependence. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 279:121405. [PMID: 35617837 DOI: 10.1016/j.saa.2022.121405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 05/05/2022] [Accepted: 05/15/2022] [Indexed: 06/15/2023]
Abstract
Ag-ZnX (X = O, S, Se) composites coated on polystyrene (PS) arrays (Ag-ZnO@PS, Ag-ZnS@PS, Ag-ZnSe@PS) were successfully fabricated by using cosputtering technology. We found that ZnX doping decreased the carrier densities of these composites compared to that of pure Ag@PS, which was due to redistribution of electrons between Ag and ZnX. Thus, the carrier density of Ag was decreased, and the surface plasmon resonance (SPR) of Ag was redshifted in the Ag-ZnX composites. As the redshift of the SPR of Ag induced a high SPR contribution to the surface-enhanced Raman scattering (SERS), the SPR and charge transfer (CT) contributions were simultaneously increased with increasing carrier density in the Ag-ZnX composites. This study opens a new path to designing metal-semiconductor composites with controllable carrier density. Regulation of the carrier density will be of great help in understanding SPR and CT contributions.
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Affiliation(s)
- Chenghao Tang
- Key Laboratory of Preparation and Applications of Environmental Friendly Materials, Ministry of Education, College of Chemistry, Jilin Normal University, Changchun 130103, PR China
| | - Eungyeong Park
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon 24341, South Korea
| | - Shuang Guo
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon 24341, South Korea
| | - Sila Jin
- Kangwon Radiation Convergence Research Support Center, Kangwon National University, Chuncheon 24341, South Korea
| | - Lina Zhao
- Key Laboratory of Preparation and Applications of Environmental Friendly Materials, Ministry of Education, College of Chemistry, Jilin Normal University, Changchun 130103, PR China.
| | - Lei Chen
- Key Laboratory of Preparation and Applications of Environmental Friendly Materials, Ministry of Education, College of Chemistry, Jilin Normal University, Changchun 130103, PR China.
| | - Young Mee Jung
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon 24341, South Korea; Kangwon Radiation Convergence Research Support Center, Kangwon National University, Chuncheon 24341, South Korea.
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Yang Z, Ma C, Gu J, Wu Y, Zhu C, Li L, Gao H, Yin W, Wang Z, Chen G. Detection of Melamine by Using Carboxyl-functionalized Ag-COF as A Novel SERS Substrate. Food Chem 2022; 401:134078. [DOI: 10.1016/j.foodchem.2022.134078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 08/08/2022] [Accepted: 08/28/2022] [Indexed: 11/26/2022]
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10
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Hu T, Xu J, Shang M, Zhao Q, Cao Y. Photonic crystal sensor for melamine based on magnetic molecularly imprinted nanoparticles self-assembled with an amphiphilic random copolymer. Mikrochim Acta 2022; 189:215. [PMID: 35524922 DOI: 10.1007/s00604-022-05300-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 03/28/2022] [Indexed: 10/18/2022]
Abstract
Magnetic molecularly imprinted nanoparticles (MMINPs) were obtained with a one-step process through miniemulsion self-assembly using an amphiphilic random copolymer as both an emulsifier and MMINP coating, oleic acid-modified magnetite nanoparticles as magnetic cores, and melamine (MEL) as the template molecule. MMINPs were assembled under an external magnetic field to construct photonic crystal (PC) sensor for naked-eye detection of MEL. The MMINPs were characterized by FT-IR, TEM, TGA, and VSM. The analytical performances of the magnetic molecularly imprinted PC sensor for MEL (MEL-MMIPCs) were investigated with respect to sensitivity, response time, selectivity, and stability. As the MEL concentration increases from 1.0 to 1.0 × 106 μg/l, the reflection wavelength of MEL-MMIPCs shifted from 497 to 709 nm, and was linear with the logarithm of MEL concentration in this range. The detection limit was 0.21 μg/l (S/N = 3) and response time was within 30 s. The MEL-MMIPC sensor had an imprinting factor of 5.09, and selectivity factors for the analogs cyanuric acid and atrazine were 8.76 and 5.75, respectively, indicating the high sensitivity and selectivity. After 10 cycles of elution/response, MEL-MMIPCs still had a good ability to recognize MEL.
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Affiliation(s)
- Tingyi Hu
- School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi, 214122, China
| | - Jiasheng Xu
- School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi, 214122, China
| | - Meng Shang
- School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi, 214122, China
| | - Qiang Zhao
- School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi, 214122, China
| | - Yuhua Cao
- School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi, 214122, China.
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11
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Tian Y, Hu H, Chen P, Dong F, Huang H, Xu L, Yan L, Song Z, Xu T, Chu W. Dielectric Walls/Layers Modulated 3D Periodically Structured SERS Chips: Design, Batch Fabrication, and Applications. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2200647. [PMID: 35322577 PMCID: PMC9130881 DOI: 10.1002/advs.202200647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 02/17/2022] [Indexed: 05/14/2023]
Abstract
As an indispensable constituent of plasmonic materials/dielectrics for surface enhanced Raman scattering (SERS) effects, dielectrics play a key role in excitation and transmission of surface plasmons which however remain more elusive relative to plasmonic materials. Herein, different roles of vertical dielectric walls, and horizontal and vertical dielectric layers in SERS via 3D periodic plasmonic materials/dielectrics structures are studied. Surface plasmon polariton (SPP) interferences can be maximized within dielectric walls besieged by plasmonic layers at the wall thicknesses of integral multiple half-SPPplasmonic material-dielectric -wavelength which effectively excites localized surface plasmon resonance to improve SERS effects by one order of magnitude compared to roughness and/or nanogaps only. The introduction of extra Au nanoparticles on thin dielectric layers can further enhance SERS effects only slightly. Thus, the designed Au/SiO2 based SERS chips show an enhancement factor of 8.9 × 1010 , 265 times higher relative to the chips with far thinner SiO2 walls. As many as 1200 chips are batch fabricated for a 4 in wafer using cost-effective nanoimprint lithography which can detect trace Hg ions as low as 1 ppt. This study demonstrates a complete generalized platform from design to low-cost batch-fabrication to applications for novel high performance SERS chips of any plasmonic materials/dielectrics.
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Affiliation(s)
- Yi Tian
- Nanofabrication LaboratoryCAS Key Laboratory for Nanophotonic Materials and DevicesCAS Key Laboratory for Nanosystems and Hierarchical FabricationCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190China
| | - Haifeng Hu
- Nanofabrication LaboratoryCAS Key Laboratory for Nanophotonic Materials and DevicesCAS Key Laboratory for Nanosystems and Hierarchical FabricationCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190China
| | - Peipei Chen
- Nanofabrication LaboratoryCAS Key Laboratory for Nanophotonic Materials and DevicesCAS Key Laboratory for Nanosystems and Hierarchical FabricationCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190China
- Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing100049China
| | - Fengliang Dong
- Nanofabrication LaboratoryCAS Key Laboratory for Nanophotonic Materials and DevicesCAS Key Laboratory for Nanosystems and Hierarchical FabricationCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190China
- Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing100049China
| | - Hui Huang
- Nanofabrication LaboratoryCAS Key Laboratory for Nanophotonic Materials and DevicesCAS Key Laboratory for Nanosystems and Hierarchical FabricationCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190China
| | - Lihua Xu
- Nanofabrication LaboratoryCAS Key Laboratory for Nanophotonic Materials and DevicesCAS Key Laboratory for Nanosystems and Hierarchical FabricationCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190China
| | - Lanqin Yan
- Nanofabrication LaboratoryCAS Key Laboratory for Nanophotonic Materials and DevicesCAS Key Laboratory for Nanosystems and Hierarchical FabricationCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190China
| | - Zhiwei Song
- Nanofabrication LaboratoryCAS Key Laboratory for Nanophotonic Materials and DevicesCAS Key Laboratory for Nanosystems and Hierarchical FabricationCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190China
| | - Taoran Xu
- Nanofabrication LaboratoryCAS Key Laboratory for Nanophotonic Materials and DevicesCAS Key Laboratory for Nanosystems and Hierarchical FabricationCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190China
- Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing100049China
| | - Weiguo Chu
- Nanofabrication LaboratoryCAS Key Laboratory for Nanophotonic Materials and DevicesCAS Key Laboratory for Nanosystems and Hierarchical FabricationCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190China
- Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing100049China
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12
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Huang WC, Cheng KF, Shyu JY. Flexible SERS substrate of silver nanoparticles on cotton swabs for rapid in situ detection of melamine. NANOSCALE ADVANCES 2022; 4:1164-1172. [PMID: 36131771 PMCID: PMC9419850 DOI: 10.1039/d1na00670c] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 01/12/2022] [Indexed: 06/15/2023]
Abstract
It is important to be able to detect melamine via a sensitive and fast method in the field of food safety. Surface-enhanced Raman scattering (SERS) has attracted much attention due to its high sensitivity, rapid results, unique spectroscopic fingerprint, and nondestructive data acquisition. In this work, we describe the preparation of flexible CS-ATS-Ag cotton swabs for use in SERS by anchoring silver nanoparticles (AgNPs), as a highly-sensitive SERS material, on cotton swabs (CS) using N-[3-(trimethoxysilyl)propyl] diethylenetriamine (ATS) as the coupling agent. The flexible CS-ATS-Ag cotton swabs exhibited high SERS sensitivity, uniformity and reproducibility as a melamine molecule probe, and the limit of detection was calculated to be 0.2 ppm. A high SERS signal reproducibility was achieved, and the relative standard deviation (RSD) of the melamine peak at 699 cm-1 was approximately 5.01%. Moreover, we successfully developed Chemical analysis App application software; a smartphone was used to convert data and record the results, then the data were geotagged using the GPS feature in the smartphone and uploaded to a central website. The goal of realizing instant transmission, timely processing, high sensitivity, portability and low cost was therefore achieved.
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Affiliation(s)
- Wen-Chien Huang
- Department of Chemical and Materials Engineering, Chung Cheng Institute of Technology, National Defense University Taoyuan 33551 Taiwan
| | - Ken-Fa Cheng
- Department of Chemical and Materials Engineering, Chung Cheng Institute of Technology, National Defense University Taoyuan 33551 Taiwan
| | - Jing-Yuan Shyu
- Chemical Systems Research Division, National Chung-Shan Institute of Science and Technology Taoyuan 32599 Taiwan
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