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Lv M, Pu H, Sun DW. A tailored dual core-shell magnetic SERS substrate with precise shell-thickness control for trace organophosphorus pesticides residues detection. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 316:124336. [PMID: 38678838 DOI: 10.1016/j.saa.2024.124336] [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: 03/01/2024] [Revised: 04/17/2024] [Accepted: 04/22/2024] [Indexed: 05/01/2024]
Abstract
For addressing the challenges of strong affinity SERS substrate to organophosphorus pesticides (OPs), herein, a rapid water-assisted layer-by-layer heteronuclear growth method was investigated to grow uniform UiO-66 shell with controllable thickness outside the magnetic core and provide abundant defect sites for OPs adsorption. By further assembling the tailored Au@Ag, a highly sensitive SERS substrate Fe3O4-COOH@UiO-66/Au@Ag (FCUAA) was synthesized with a SERS enhancement factor of 2.11 × 107. The substrate's suitability for the actual vegetable samples (cowpeas and peppers) was confirmed under both destructive and non-destructive detection conditions, showing a strong SERS response to fenthion and triazophos, with limits of detection of 1.21 × 10-5 and 2.96 × 10-3 mg/kg in the vegetables under destructive conditions, and 0.13 and 1.39 ng/cm2 for non-destructive detection, respectively. The FCUAA substrate had high SERS performance, effective adsorption capability for OPs, and demonstrated good applicability, thus exhibiting great potential for rapid detection of trace OPs residues in the food industry.
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Affiliation(s)
- Mingchun Lv
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China; Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China
| | - Hongbin Pu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China; Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China; Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China
| | - Da-Wen Sun
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China; Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China; Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China; Food Refrigeration and Computerized Food Technology (FRCFT), Agriculture and Food Science Centre, University College Dublin, National University of Ireland, Belfield, Dublin 4, Ireland.
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2
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Yang N, Pu H, Sun DW. Developing a magnetic SERS nanosensor utilizing aminated Fe-Based MOF for ultrasensitive trace detection of organophosphorus pesticides in apple juice. Food Chem 2024; 446:138846. [PMID: 38460279 DOI: 10.1016/j.foodchem.2024.138846] [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: 11/14/2023] [Revised: 02/20/2024] [Accepted: 02/21/2024] [Indexed: 03/11/2024]
Abstract
The unreasonable use of organophosphorus pesticides leads to excessive pesticide residues in food, seriously threatening public health, and the potential of surface-enhanced Raman spectroscopy (SERS) technology, incorporating a metal-organic framework, is substantial for the rapid detection of trace pesticide residues. Here, a novel Fe3O4@NH2-MIL-101(Fe)@Ag (FNMA) SERS nanosensor was developed. Results indicated that the FNMA had a high enhancement factor of 1.53 × 108, a low limit of detection (LOD) of 4.55 × 10-12 M, and a relative standard deviation of 7.73 % for 4-nitrothiophenol, demonstrating its good SERS sensitivity and uniformity, and also possessed good storage stability for one month. In quantifying fenthion and methyl parathion in standard solutions and apple juice in the range of 0.05/0.02-20 mg/L, it showed LODs of 3.02 × 10-3 mg/L and 1.43 × 10-3 mg/L, and 0.0407 and 0.0075 mg/L, respectively, demonstrating potentials in ultrasensitive trace detection of pesticides in food.
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Affiliation(s)
- Nengjing Yang
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China; Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China
| | - Hongbin Pu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China; Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China
| | - Da-Wen Sun
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China; Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China; Food Refrigeration and Computerized Food Technology (FRCFT), Agriculture and Food Science Centre, University College Dublin, National University of Ireland, Belfield, Dublin 4, Ireland.
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3
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Chen Z, Tan R, Zeng M, Yuan X, Zhuang K, Feng C, He Y, Luo X. SERS detection of triazole pesticide residues on vegetables and fruits using Au decahedral nanoparticles. Food Chem 2024; 439:138110. [PMID: 38043282 DOI: 10.1016/j.foodchem.2023.138110] [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: 09/13/2023] [Revised: 11/11/2023] [Accepted: 11/26/2023] [Indexed: 12/05/2023]
Abstract
Triazole pesticides are widely used in modern agricultural practices to improve agricultural production quality. Simultaneously, unreasonable and standardized use of triazole pesticides could induce a series of potential diseases of humans. Surface-enhanced Raman spectroscopy has attracted enormous research attention because of its label-free and fingerprint detection capability to noninvasively trace extremely low concentration analytes. To the best of our knowledge, there is a lack of systematic comparison regarding the Raman spectral information of triazole pesticides in existing literatures. In this work, we successfully captured the characteristic peaks of six different triazole pesticides individually and simultaneously using Au decahedral nanoparticles. The proposed method exhibited remarkable detection sensitivity, a wide dynamic range, and the capability for in-situ detection of multiple pesticide residues on bean, apple, and vegetable surfaces with satisfactory recovery rates. Therefore, our proposed SERS platform have great applications in agricultural products safety, environmental monitoring and other fields.
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Affiliation(s)
- Zhinan Chen
- School of Science, Xihua University, Chengdu, Sichuan 610039, China
| | - Rui Tan
- School of Science, Xihua University, Chengdu, Sichuan 610039, China
| | - Mei Zeng
- School of Science, Xihua University, Chengdu, Sichuan 610039, China
| | - Xue Yuan
- School of Science, Xihua University, Chengdu, Sichuan 610039, China
| | - Kaiyi Zhuang
- School of Science, Xihua University, Chengdu, Sichuan 610039, China
| | - Changsheng Feng
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, China.
| | - Yi He
- School of Science, Xihua University, Chengdu, Sichuan 610039, China; Asymmetric Synthesis and Chiral Technology Key Laboratory of Sichuan Province, Chengdu 610039, China.
| | - Xiaojun Luo
- School of Science, Xihua University, Chengdu, Sichuan 610039, China; Asymmetric Synthesis and Chiral Technology Key Laboratory of Sichuan Province, Chengdu 610039, China.
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4
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Lv M, Pu H, Sun DW. Preparation of Fe 3O 4@UiO-66(Zr)@Ag NPs core-shell-satellite structured SERS substrate for trace detection of organophosphorus pesticides residues. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 294:122548. [PMID: 36947914 DOI: 10.1016/j.saa.2023.122548] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 02/10/2023] [Accepted: 02/20/2023] [Indexed: 06/18/2023]
Abstract
Surface-enhanced Raman spectroscopy (SERS) technology has been revived and developed with the introduction of metal-organic frameworks (MOFs), while more valuable properties of MOFs for SERS substrates remain largely unexplored. This work constructed a new SERS substrate Fe3O4@UiO-66(Zr)@Ag nanoparticles (FUAs) with excellent SERS detection sensitivity, uniformity, reproducibility and stability, exhibiting a high Raman enhancement factor (5.62 × 106), low limit of detection (LOD, 2.11 × 10-11 M) and RSD (12.41 %) for 4-NBT, and maintaining 81 % SERS activity within 60 days. The FUAs took full advantage of the strong affinity of UiO-66(Zr) for organophosphorus pesticides (OPs) to realize trace OPs detection. The LODs of phoxim, triazophos and methyl parathion in apple juice were 0.041, 0.021 and 0.0031 mg/L, respectively, with good linearities ranging from 0.02 or 0.1-50 mg/L, meeting the requirements of the food control standards, indicating that the potentials and prospects of the FUAs SERS substrate for trace detecting OPs in foods.
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Affiliation(s)
- Mingchun Lv
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China; Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China
| | - Hongbin Pu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China; Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China; Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China
| | - Da-Wen Sun
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China; Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China; Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China; Food Refrigeration and Computerized Food Technology (FRCFT), Agriculture and Food Science Centre, University College Dublin, National University of Ireland, Belfield, Dublin 4, Ireland.
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5
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Kitahama Y, Pancorbo PM, Segawa H, Marumi M, Xiao TH, Hiramatsu K, Yang W, Goda K. Place & Play SERS: sample collection and preparation-free surface-enhanced Raman spectroscopy. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:1028-1036. [PMID: 36762487 DOI: 10.1039/d2ay02090d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The ability to perform sensitive, real-time, in situ, multiplex chemical analysis is indispensable for diverse applications such as human health monitoring, food safety testing, forensic analysis, environmental sensing, and homeland security. Surface-enhanced Raman spectroscopy (SERS) is an effective tool to offer the ability by virtue of its high sensitivity and rapid label-free signal detection as well as the availability of portable Raman spectrometers. Unfortunately, the practical utility of SERS is limited because it generally requires sample collection and preparation, namely, collecting a sample from an object of interest and placing the sample on top of a SERS substrate to perform a SERS measurement. In fact, not all analytes can satisfy this requirement because the sample collection and preparation process may be undesirable, laborious, difficult, dangerous, costly, or time-consuming. Here we introduce "Place & Play SERS" based on an ultrathin, flexible, stretchable, adhesive, biointegratable gold-deposited polyvinyl alcohol (PVA) nanomesh substrate that enables placing the substrate on top of an object of interest and performing a SERS measurement of the object by epi-excitation without the need for touching, destroying, and sampling it. Specifically, we characterized the sensitivity of the gold/PVA nanomesh substrate in the Place & Play SERS measurement scheme and then used the scheme to conduct SERS measurements of both wet and dry objects under nearly real-world conditions. To show the practical utility of Place & Play SERS, we demonstrated two examples of its application: food safety testing and forensic analysis. Our results firmly verified the new measurement scheme of SERS and are expected to extend the potential of SERS by opening up untapped applications of sensitive, real-time, in situ multiplex chemical analysis.
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Affiliation(s)
- Yasutaka Kitahama
- Department of Chemistry, The University of Tokyo, Tokyo 113-0033, Japan.
- LucasLand, Co. Ltd, Tokyo 101-0052, Japan
| | | | - Hiroki Segawa
- Third Department of Forensic Science, National Research Institute of Police Science, Chiba 277-0882, Japan
| | - Machiko Marumi
- Department of Chemistry, The University of Tokyo, Tokyo 113-0033, Japan.
| | - Ting-Hui Xiao
- Department of Chemistry, The University of Tokyo, Tokyo 113-0033, Japan.
- LucasLand, Co. Ltd, Tokyo 101-0052, Japan
- Institute for Quantum Life Science, National Institute for Quantum and Radiological Science and Technology, Chiba 263-8555, Japan
| | - Kotaro Hiramatsu
- Department of Chemistry, The University of Tokyo, Tokyo 113-0033, Japan.
| | | | - Keisuke Goda
- Department of Chemistry, The University of Tokyo, Tokyo 113-0033, Japan.
- LucasLand, Co. Ltd, Tokyo 101-0052, Japan
- Institute for Quantum Life Science, National Institute for Quantum and Radiological Science and Technology, Chiba 263-8555, Japan
- Institute of Technological Sciences, Wuhan University, Hubei 430072, China
- Department of Bioengineering, University of California, Los Angeles, California 90095, USA
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6
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Wu J, Huang Y, Miao J, Lai K. Detection of thiram on fruit surfaces and in juices with minimum sample pretreatment via a bendable and reusable substrate for surface-enhanced Raman scattering. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2022; 102:6211-6219. [PMID: 35478166 DOI: 10.1002/jsfa.11970] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 04/21/2022] [Accepted: 04/27/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND Surface-enhanced Raman scattering (SERS) substrates based on metallic nanoparticles locked in some flexible materials have great potential for rapid detection of pesticide residues in foods, but these substrates are generally not reusable. RESULTS A bendable and reusable sponge based on polydimethylsiloxane (PDMS) and Au nanospheres was synthesized and employed as SERS substrate to analyze thiram on the surfaces of apples and grapes (20-1000 ng cm-2 ) and in their juices (0.5-5.0 mg L-1 ) with minimum sample pretreatments. The lowest detectible concentrations for thiram in fruit juices and on fruit skins were 0.5 mg L-1 and 20 ng cm-2 , respectively. The Au-PDMS substrate had acceptable intra-reproducibility for SERS analysis of thiram in fruit juices and on fruit skins, resulting in 3.6-16.9% relative standard deviation (RSD) for the SERS signal of the primary peak of thiram. Moreover, the Au-PDMS substrate exhibited distinguished reusability and stability, which could provide a reproducible SERS signal of thiram in apple juice even after the substrate being reused ten times (RSDs for the three major characteristic peaks of thiram were 2.7-10.5% during the ten reused cycles). CONCLUSION This flexible and reusable Au-PDMS SERS substrate for thiram detection could be readily extended to the analysis of other trace chemicals in a broad range of foods, providing a new possibility for SERS application. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Jiaqi Wu
- College of Food Science and Technology, Shanghai Ocean University, Shanghai, China
- School of Food Science and Bioengineering, Changsha University of Science and Technology, Changsha, China
| | - Yiqun Huang
- School of Food Science and Bioengineering, Changsha University of Science and Technology, Changsha, China
| | - Junjian Miao
- College of Food Science and Technology, Shanghai Ocean University, Shanghai, China
- Engineering Research Center of Food Thermal-Processing Technology, Shanghai Ocean University, Shanghai, China
| | - Keqiang Lai
- College of Food Science and Technology, Shanghai Ocean University, Shanghai, China
- Engineering Research Center of Food Thermal-Processing Technology, Shanghai Ocean University, Shanghai, China
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7
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Wang D, Gong Z, Tang M, Fan W, Huang B, Fan M. Halogen ion modified Ag NPs for ultrasensitive SERS detection of nitroaromatic explosives. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:3798-3801. [PMID: 36124919 DOI: 10.1039/d2ay01299e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Trace explosive detection has become one of the hottest topics in scientific communities because homeland security is one of the top priorities for countries all around the world. In this work, Ag NPs prepared with different reducing reagents were modified with various halogen ions for the SERS detection of nitroaromatic explosives (2,4-DNT and 2,4,6-TNT). It was proposed that halogen ions probably replaced the surface adsorbates on Ag NPs, i.e., citrate ions, and gave surface access to target analytes, which in turn enhanced the SERS signal. The LOD values for TNT and 2,4-DNT were found to be only 2 femtomoles. Given its facile and the highly sensitive process, the method that we demonstrated can serve as a promising analytical technology for the ultrasensitive SERS detection of nitroaromatic explosives.
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Affiliation(s)
- Dongmei Wang
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, China.
- State-province Joint Engineering Laboratory of Spatial Information Technology of High-Speed Rail Safety, Chengdu, 610031, China
| | - Zhengjun Gong
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, China.
- State-province Joint Engineering Laboratory of Spatial Information Technology of High-Speed Rail Safety, Chengdu, 610031, China
| | - Mi Tang
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, China.
| | - Wanli Fan
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, China.
| | - Bing Huang
- Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, China
| | - Meikun Fan
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, China.
- State-province Joint Engineering Laboratory of Spatial Information Technology of High-Speed Rail Safety, Chengdu, 610031, China
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8
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Mishra S, Mishra S, Patel SS, Singh SP, Kumar P, Khan MA, Awasthi H, Singh S. Carbon nanomaterials for the detection of pesticide residues in food: A review. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 310:119804. [PMID: 35926736 DOI: 10.1016/j.envpol.2022.119804] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 06/02/2022] [Accepted: 07/14/2022] [Indexed: 06/15/2023]
Abstract
In agricultural fields, pesticides are widely used, but their residual presence in the environment poses a threat to humans, animals, insects, and ecosystems. The overuse of pesticides for pest control, enhancement of crop yield, etc. leaves behind a significant residual amount in the environment. Various robust, reliable, and reusable methods using a wide class of composites have been developed for the monitoring and controlling of pesticides. Researchers have discovered that carbon nanomaterials have a wide range of characteristics such as high porosity, conductivity and easy electron transfer that can be successfully used to detect pesticide residues from food. This review emphasizes the role of carbon nanomaterials in the field of pesticide residue analysis in different food matrices. The carbon nanomaterials including carbon nanotubes, carbon dots, carbon nanofibers, graphene/graphene oxides, and activated carbon fibres are discussed in the review. In addition, the review examines future prospects in this research area to help improve detection techniques for pesticides analysis.
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Affiliation(s)
- Smriti Mishra
- Industrial Waste Utilization, Nano and Biomaterial Division, CSIR- Advanced Materials and Processes Research Institute (CSIR-AMPRI), Hoshangabad Road, Bhopal, Madhya Pradesh-462026, India
| | - Shivangi Mishra
- Pesticide Toxicology Laboratory & Regulatory Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan, 31 Mahatma Gandhi Marg, Lucknow-226001, Uttar Pradesh, India
| | - Shiv Singh Patel
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India; Water Resources Management and Rural Technology, CSIR- Advanced Materials and Processes Research Institute (CSIR-AMPRI), Hoshangabad Road, Bhopal, Madhya Pradesh- 462026, India
| | - Sheelendra Pratap Singh
- Pesticide Toxicology Laboratory & Regulatory Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan, 31 Mahatma Gandhi Marg, Lucknow-226001, Uttar Pradesh, India; Analytical Chemistry Laboratory, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan, 31 Mahatma Gandhi Marg, Lucknow-226001, Uttar Pradesh, India
| | - Pradip Kumar
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India; Green Engineered Materials and Additive Manufacturing, Council of Scientific and Industrial Research- Advanced Materials and Processes Research Institute, Bhopal - 462026, India
| | - Mohd Akram Khan
- Industrial Waste Utilization, Nano and Biomaterial Division, CSIR- Advanced Materials and Processes Research Institute (CSIR-AMPRI), Hoshangabad Road, Bhopal, Madhya Pradesh-462026, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Himani Awasthi
- Hygia Institute of Pharmaceutical Education and Research, Lucknow-226020, India
| | - Shiv Singh
- Industrial Waste Utilization, Nano and Biomaterial Division, CSIR- Advanced Materials and Processes Research Institute (CSIR-AMPRI), Hoshangabad Road, Bhopal, Madhya Pradesh-462026, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
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9
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Hu H. Smart polydimethylsiloxane sponges with high piezoelectric responses. POLYM ENG SCI 2022. [DOI: 10.1002/pen.26158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hang Hu
- School of Mechanical Engineering and Automation Beihang University Beijing People's Republic of China
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10
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Gong T, Li H, Wang G, Guan F, Huang W, Zhang X. An anti-scratch flexible SERS substrate for pesticide residue detection on the surface of fruits and vegetables. NANOTECHNOLOGY 2022; 33:405501. [PMID: 35767929 DOI: 10.1088/1361-6528/ac7cf3] [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: 03/04/2022] [Accepted: 06/29/2022] [Indexed: 06/15/2023]
Abstract
We propose an anti-scratch flexible surface-enhanced Raman scattering substrate with arrayed nanocavity microstructures fabricated by colloidal lithography. The nanocavity microstructure of the substrate can well protect the inner gold nanoparticles during wipe sampling. The prepared flexible substrate was able to detect 4-aminothiophenol (4-ATP) with a concentration down to 1 fM. Furthermore, the substrate was used to detect 6-BA residues on the surface of apples and bean sprouts through wipe sampling, which shows great potential in the field of rapid on-site detection, especially in the detection of pesticide residues on the surface of fruits and vegetables.
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Affiliation(s)
- Tianxun Gong
- State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering (National Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Haonan Li
- State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering (National Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Guilin Wang
- State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering (National Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Fang Guan
- State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering (National Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Wen Huang
- State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering (National Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Xiaosheng Zhang
- State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering (National Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu, People's Republic of China
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11
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Assessing the effect of different pH maintenance situations on bacterial SERS spectra. Anal Bioanal Chem 2022; 414:4977-4985. [PMID: 35606451 DOI: 10.1007/s00216-022-04125-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 04/24/2022] [Accepted: 05/10/2022] [Indexed: 11/01/2022]
Abstract
Phenotyping of bacteria with vibrational spectroscopy has caught much attention in bacteria-related research. It is known that many factors could affect this process. Among them, solution pH maintenance is crucial, yet its impact on the bacterial SERS spectra is surprisingly neglected. In this work, we focused on two situations related to pH maintenance: the effect of the same buffer on the SERS spectra of bacteria under different pH values, and the influence of different buffers on the SERS spectra of bacteria under the same pH value. Specifically, Britton-Robison (BR) buffer was used to evaluate the effect of pH value on bacteria SERS spectra thanks to its wide pH range. Four different buffers, namely BR buffer, acetate buffer, phosphate buffer, and carbonate buffer, were used to illustrate the impact of buffer types on SERS spectra of bacteria. The results showed that the intensity and number of characteristic peaks of the SERS spectra of Gram-negative (G -) bacteria changed more significantly than Gram-positive (G +) bacteria with the change of pH value. Furthermore, compared with phosphate buffer and carbonate buffer, BR buffer could bring more characteristic SERS bands with better reproducibility, but slightly inferior to acetate buffer. In conclusion, the influence of the pH and types of the buffer on the SERS spectra of bacteria are worthy of further discussion.
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12
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Dai B, Xu Y, Wang T, Wang S, Tang L, Tang J. Recent Advances in Agglomeration Detection and Dual-Function Application of Surface-Enhanced Raman Scattering (SERS). J Biomed Nanotechnol 2022. [DOI: 10.1166/jbn.2022.3356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Surface-enhanced Raman scattering (SERS) has been widely utilized in early detection of disease biomarkers, cell imaging, and trace contamination detection, owing to its ultra-high sensitivity. However, it is also subject to certain application restrictions in virtue of its expensive
detection equipment and long-term stability of SERS-active substrate. Recently, great progress has been made in SERS technology, represented by agglomeration method. Dual readout signal detection methods are combined with SERS, including electrochemical detection, fluorescence detection, etc.,
establishing a new fantastic viewpoint for application of SERS. In this review, we have made a comprehensive report on development of agglomeration detection and dual-function detection methods based on SERS. The synthesis methods for plasmonic materials and mainstream SERS enhancement mechanism
are also summarized. Finally, the key facing challenges are discussed and prospects are addressed.
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Affiliation(s)
- Bailin Dai
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, National & Local Joint Engineering Research Center for Advanced Packaging Material and Technology, Hunan University of Technology, Zhuzhou 412007, P. R. China
| | - Yue Xu
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, National & Local Joint Engineering Research Center for Advanced Packaging Material and Technology, Hunan University of Technology, Zhuzhou 412007, P. R. China
| | - Tao Wang
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, National & Local Joint Engineering Research Center for Advanced Packaging Material and Technology, Hunan University of Technology, Zhuzhou 412007, P. R. China
| | - Shasha Wang
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu 610065, Sichuan, P. R. China
| | - Li Tang
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, National & Local Joint Engineering Research Center for Advanced Packaging Material and Technology, Hunan University of Technology, Zhuzhou 412007, P. R. China
| | - Jianxin Tang
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, National & Local Joint Engineering Research Center for Advanced Packaging Material and Technology, Hunan University of Technology, Zhuzhou 412007, P. R. China
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13
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Zhu C, Liu W, Wang D, Gong Z, Fan M. Boosting bacteria differentiation efficiency with multidimensional surface-enhanced Raman scattering: the example of Bacillus cereus. LUMINESCENCE 2022; 37:1145-1151. [PMID: 35481694 DOI: 10.1002/bio.4268] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Revised: 04/22/2022] [Accepted: 04/25/2022] [Indexed: 12/15/2022]
Abstract
Surface-enhanced Raman scattering (SERS) is a powerful tool for constructing biomolecular fingerprints, which play a vital role in differentiation of bacteria. Due to the rather subtle differences in the SERS spectra among different bacteria, artificial intelligence is usually adopted and enormous amounts of spectral data are required to improve the differentiation efficiency. However, in many cases, large volume data acquisition on bacteria is not only technical difficult but labour intensive. It is known that surface modification of SERS nanomaterials can bring additional dimensionality (difference) of the SERS fingerprints. Here in this work, we show that the concept could be used to improve the bacteria differentiation efficiency. Ag NPs were modified with 11-mercaptoundecanoic acid, 11-mercapto-1-undecanol, and 1-dodecanethiol to provide additional dimensionality. The modified NPs then were mixed with cell lysate from different strains of Bacillus cereus (B. cereus). Even by applying a simple PCA process to the resulting SERS spectra data, all the three modified Ag NPs showed superior differentiation results compared with bare Ag NPs, which could only separate Staphylococcus aureus (S. aureus) and B. cereus. It is believed that the multidimensional SERS could find great potential in bacteria differentiation.
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Affiliation(s)
- Chengye Zhu
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, China
| | - Wen Liu
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, China
| | - Dongmei Wang
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, China
| | - Zhengjun Gong
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, China
| | - Meikun Fan
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, China
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14
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Self-Assembly of Au–Ag Alloy Hollow Nanochains for Enhanced Plasmon-Driven Surface-Enhanced Raman Scattering. NANOMATERIALS 2022; 12:nano12081244. [PMID: 35457952 PMCID: PMC9025440 DOI: 10.3390/nano12081244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 04/01/2022] [Accepted: 04/05/2022] [Indexed: 11/17/2022]
Abstract
In this paper, Au–Ag alloy hollow nanochains (HNCs) were successfully prepared by a template-free self-assembly method achieved by partial substitution of ligands. The obtained Au–Ag alloy HNCs exhibit stronger enhancement as surface-enhanced Raman scattering (SERS) substrates than Au–Ag alloy hollow nanoparticles (HNPs) and Au nanochains substrates with an intensity ratio of about 1.3:1:1. Finite difference time domain (FDTD) simulations show that the SERS enhancement of Au–Ag alloy HNCs substrates is produced by a synergistic effect between the plasmon hybridization effect associated with the unique alloy hollow structure and the strong “hot spot” in the interstitial regions of the nanochains.
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15
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Ma X, Xie J, Wang Z, Zhang Y. Transparent and flexible AuNSs/PDMS-based SERS substrates for in-situ detection of pesticide residues. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 267:120542. [PMID: 34749261 DOI: 10.1016/j.saa.2021.120542] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 10/20/2021] [Accepted: 10/23/2021] [Indexed: 06/13/2023]
Abstract
Herein, we developed a PDMS-based flexible SERS substrate modified with gold nanostars (AuNSs) for in-situ detection of pesticide residues on fruit surfaces. AuNSs with sharp branches were assembled on aminated PDMS membrane by chemical bonding effect. The AuNSs/PDMS substrate showed good signal uniformity, stability and sensitivity using the Raman signal molecule 4-MBA and the detection concentration of 4-MBA was as low as 10-8 mol/L. Then the AuNSs/PDMS substrate was used to detect methyl parathion (MP) standard solution. A good linear relationship between SERS intensity at 1342 cm-1 and MP concentration was established in the range of 4 μg/mL-100 μg/mL, and the limit of detection was down to 1.946 μg/mL. Moreover, the AuNSs/PDMS substrate was directly covered on the surface of MP contaminated apple, and the Raman laser was incident from the back of substrate to achieve in-situ detection of pesticide residues. The recovery ratio indicated that the fabricated SERS substrate was realized successfully in real sample detection. AuNSs/PDMS substrate eliminates the requirement for sample pre-processing steps before testing, which can be used as a method for rapid inspection of pesticide in agricultural products on site.
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Affiliation(s)
- Xiaoyuan Ma
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, PR China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, PR China
| | - Jie Xie
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China
| | - Zhouping Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, PR China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, PR China; Key Laboratory of Meat Processing of Sichuan, Chengdu University, Chengdu 610106, PR China.
| | - Yin Zhang
- Key Laboratory of Meat Processing of Sichuan, Chengdu University, Chengdu 610106, PR China
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16
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Zhang J, Zhu X, Chen M, Chen T, Liu Z, Huang J, Fu F, Lin Z, Dong Y. Hybridizing aggregated gold nanoparticles with a hydrogel to prepare a flexible SERS chip for detecting organophosphorus pesticides. Analyst 2022; 147:2802-2808. [DOI: 10.1039/d2an00541g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple method has been developed to hybridize aggregated gold nanoparticles with a hydrogel for novel hydrogel SERS chips with high sensitivity, good repeatability, long-term stability, and strong anti-interference ability.
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Affiliation(s)
- Jiaxin Zhang
- MOE Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, China
| | - Xiajun Zhu
- MOE Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, China
| | - Mingming Chen
- MOE Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, China
| | - Tianwen Chen
- Fujian College Association Instrumental Analysis Center of Fuzhou University, Fuzhou, China
| | - Zhihong Liu
- MOE Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, China
| | - Jianli Huang
- Institute of Grain and Oil Quality Supervision and Test of Fujian, Fuzhou, 350012, China
| | - Fengfu Fu
- MOE Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, China
| | - Zhenyu Lin
- MOE Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, China
| | - Yongqiang Dong
- MOE Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, China
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17
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Zhang D, Liang P, Chen W, Tang Z, Li C, Xiao K, Jin S, Ni D, Yu Z. Rapid field trace detection of pesticide residue in food based on surface-enhanced Raman spectroscopy. Mikrochim Acta 2021; 188:370. [PMID: 34622367 DOI: 10.1007/s00604-021-05025-3] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 09/19/2021] [Indexed: 12/17/2022]
Abstract
Surface-enhanced Raman spectroscopy is an alternative detection tool for monitoring food security. However, there is still a lack of a conclusion of SERS detection with respect to pesticides and real sample analysis, and the summary of intelligent algorithms in SERS is also a blank. In this review, a comprehensive report of pesticides detection using SERS technology is given. The SERS detection characteristics of different types of pesticides and the influence of substrate on inspection are discussed and compared by the typical ways of classification. The key points, including the progress in real sample analysis and Raman data processing methods with intelligent algorithm, are highlighted. Lastly, major challenges and future research trends of SERS analysis of pesticide residue are also addressed. SERS has been proven to be a powerful technique for rapid test of residue pesticides in complex food matrices, but there still is a tremendous development space for future research.
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Affiliation(s)
- De Zhang
- College of Horticulture & Forestry Sciences, Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, China
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou, 310018, China
| | - Pei Liang
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou, 310018, China.
| | - Wenwen Chen
- College of Horticulture & Forestry Sciences, Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, China
| | - Zhexiang Tang
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou, 310018, China
| | - Chen Li
- Jiangxi Sericulture and Tea Research Institute, Nanchang, 330203, China
| | - Kunyue Xiao
- College of Horticulture & Forestry Sciences, Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, China
| | - Shangzhong Jin
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou, 310018, China
| | - Dejiang Ni
- College of Horticulture & Forestry Sciences, Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, China
| | - Zhi Yu
- College of Horticulture & Forestry Sciences, Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, China.
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18
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Application of surface-enhanced Raman spectroscopy using silver and gold nanoparticles for the detection of pesticides in fruit and fruit juice. Trends Food Sci Technol 2021. [DOI: 10.1016/j.tifs.2021.08.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Fan W, Yang S, Gao W, Wang D, Fan M. Highly sensitive bromide aided SERS detection of furazolidone and 3-amino-2-oxazolidinone residual in aquaculture products. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106532] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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20
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Liu J, Liu W, Zhou SN, Wang DM, Gong ZJ, Fan MK. Free-Standing Membrane Liquid-State Platform for SERS-Based Determination of Norfloxacin in Environmental Samples. JOURNAL OF ANALYSIS AND TESTING 2021. [DOI: 10.1007/s41664-021-00192-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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21
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Liu J, Liu W, Huang Y, Zhao X, Feng Z, Wang D, Gong Z, Fan M. Self-supporting liquid film as reproducible SERS platform for therapeutic drug monitoring of berberine hydrochloride in human urine. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106122] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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22
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Fan W, Yang S, Zhang Y, Huang B, Gong Z, Wang D, Fan M. Multifunctional Flexible SERS Sensor on a Fixate Gel Pad: Capturing, Derivation, and Selective Picogram Indirect Detection of Explosive 2,2',4,4',6,6'-Hexanitrostilbene. ACS Sens 2020; 5:3599-3606. [PMID: 33155795 DOI: 10.1021/acssensors.0c01908] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
2,2',4,4',6,6'-Hexanitrostilbene (HNS) is an explosive with better explosion performance than the well-known 2,4,6-trinitrotoluene (TNT). Surprisingly, unlike other nitroaromatic explosives, there are limited reports regarding the detection of the HNS, let alone sensing reports on surface residues. In this work, a multifunctional flexible SERS sensor was proposed for the indirect detection of HNS based on the transparent fixate gel pads. The sticky and flexible gel pad can effectively collect any HNS surface residues. The inherent amine groups within the gel pad of which the main ingredient is polyurethane can react with HNS to form the orange Meisenheimer-alike complex. The modification of Ag NPs with halide ions was screened for the best SERS performance. KI-modified-citrate-reduced Ag NPs showed selective but enormous SERS enhancement for the HNS derivative. The detection of HNS in the solution phase was explored, and a linear range of 0.01-25 ppm was achieved. The lowest detectable amount (LDA) of HNS was found to be 50 pg, making it one of the most sensitive methods in literature. It was successfully utilized for the HNS residues sensing on fingerprints and bags with LDAs of 5 and 200 ng, respectively. In addition, other explosives including TATB, LLM-105, RDX, HMX, FOX-7, and TNT were also examined to assess the selectivity of the fixate. It was found that the fixate showed excellent selectivity for HNS.
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Affiliation(s)
- Wanli Fan
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Shiwei Yang
- School of Civil Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Yongzheng Zhang
- School of Physics and Physical Engineering, Qufu Normal University, Qufu, Shandong 273165, China
| | - Bing Huang
- Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang, Sichuan 621999, China
| | - Zhengjun Gong
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Dongmei Wang
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Meikun Fan
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
- School of Civil Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
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23
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High-performance SERS detection of pesticides using BiOCl-BiOBr@Pt/Au hybrid nanostructures on styrofoams as 3D functional substrate. Mikrochim Acta 2020; 187:580. [DOI: 10.1007/s00604-020-04558-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 09/13/2020] [Indexed: 02/06/2023]
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24
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Liu W, Huang Y, Liu J, Chao S, Wang D, Gong Z, Feng Z, Fan M. Unsupported liquid-state platform for SERS-based determination of triazophos. Mikrochim Acta 2020; 187:502. [PMID: 32812088 DOI: 10.1007/s00604-020-04474-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 08/04/2020] [Indexed: 02/05/2023]
Abstract
A highly reproducible surface-enhanced Raman scattering (SERS) unsupported liquid-state platform (ULP) was developed for accurate quantitative determination of triazophos. Herein, citrate-reduced Ag NPs suspension was concentrated and placed in a stainless steel perforated template to form the SERS ULP. The relative standard deviation of the SERS measurements was less than 5% (n ≥ 10), and the R2 of the calibration curve was 0.994. The developed SERS ULP was applied for determination of triazophos in spiked agricultural products (rice, cabbage, and apple). Experiment results showed that the coefficient of variation ranged from 5.3 to 6.2% for intra-day and from 5.5 to 6.3% for inter-day (n = 3), which proved excellent SERS reproducibility. Moreover, the results were in good agreement with those from HPLC analysis. As a liquid-state SERS substrate, the highly reproducible ULP can perform precision quantitative analysis without surface modification of NPs, which is a significant improvement. This method provides a new perspective for quantitative SERS analysis of pesticide residues. Graphical abstract.
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Affiliation(s)
- Wen Liu
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Yuting Huang
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Jing Liu
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Shengmao Chao
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Dongmei Wang
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Zhengjun Gong
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Zhe Feng
- Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, 610031, China
| | - Meikun Fan
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 610031, China.
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25
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Rapid simultaneous adsorption and SERS detection of acid orange II using versatile gold nanoparticles decorated NH 2-MIL-101(Cr). Anal Chim Acta 2020; 1129:126-135. [PMID: 32891382 DOI: 10.1016/j.aca.2020.07.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 07/05/2020] [Accepted: 07/07/2020] [Indexed: 11/23/2022]
Abstract
Acid orange II (AO II), a typical azo pigment, is strictly controlled by legislation and prohibited in foodstuffs. Herein, we prepared gold nanoparticles decorated amino-functionalized Cr-based metal-organic frameworks [NH2-MIL-101(Cr)@Au] via an in-situ reduction method as a surface-enhanced Raman scattering (SERS) substrate for simultaneous adsorption and detection of AO II. Gold nanoparticles are uniformly dispersed on the surface of NH2-MIL-101(Cr) owing to its three-dimensional (3D) structure and the interaction between -NH2 and Au ions, providing more SERS-active "hot spots". These NH2-MIL-101(Cr)@Au nanocomposites exhibited selective and high adsorption performance (419.85 mg g-1) for AO II, and could be used as superior SERS substrates for the detection of AO II with a low limit of detection (LOD) of 0.05 mg L-1 and wide detection range of 0.05-50 mg L-1 using portable Raman spectrometer. Furthermore, this SERS assay has been successfully used to determine AO II in orange juice and chili powder with good sensitivities.
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26
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Shao F, Cao J, Ying Y, Liu Y, Wang D, Guo X, Wu Y, Wen Y, Yang H. Preparation of Hydrophobic Film by Electrospinning for Rapid SERS Detection of Trace Triazophos. SENSORS (BASEL, SWITZERLAND) 2020; 20:s20154120. [PMID: 32722113 PMCID: PMC7436116 DOI: 10.3390/s20154120] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 07/18/2020] [Accepted: 07/22/2020] [Indexed: 05/03/2023]
Abstract
For real application, it is an urgent demand to fabricate stable and flexible surface-enhanced Raman scattering (SERS) substrates with high enhancement factors in a large-scale and facile way. Herein, by using the electrospinning technique, a hydrophobic and flexible poly(styrene-co-butadiene) (SB) fibrous membrane is obtained, which is beneficial for modification of silver nanoparticles (Ag NPs) colloid in a small region and then formation of more "hot spots" by drying; the final SERS substrate is designated as Ag/SB. Hydrophobic Ag/SB can efficiently capture heterocyclic molecules into the vicinity of hot spots of Ag NPs. Such Ag/SB films are used to quantitatively detect trace triazophos residue on fruit peels or in the juice, and the limit of detection (LOD) of 2.5 × 10-8 M is achieved. Ag/SB films possess a capability to resist heat. As a case, 6-mercaptopurine (6MP) that just barely dissolves in 90 °C water is picked for conducting Ag/SB-film-based experiments.
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27
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Duan N, Shen M, Qi S, Wang W, Wu S, Wang Z. A SERS aptasensor for simultaneous multiple pathogens detection using gold decorated PDMS substrate. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 230:118103. [PMID: 32000058 DOI: 10.1016/j.saa.2020.118103] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 01/22/2020] [Accepted: 01/22/2020] [Indexed: 05/14/2023]
Abstract
An aptamer-based sensitive method was developed here for detection of multiple foodborne pathogens in food matrix by surface-enhanced Raman scattering (SERS) technology. Polydimethylsiloxane (PDMS) film was first prepared and then coated with gold nanoparticles (AuNP) to act as an active substrate for the enhancement of Raman scattering. The as-prepared Au-PDMS film was functionalized with specific pathogen aptamers (Apt) to capture the targets. In addition, aptamers functionalized AuNP integrated with Raman reporters (4-Mercaptobenzoic acid (4-MBA)/Nile blue A (NBA)) were fabricated as pathogen-specific SERS probes. In this scheme, pathogens were first captured by Apt-Au-PDMS film and then bind with SERS probes to allow the formation of a sandwich assay to complete the sensor module for the detection of multiple pathogens. With Vibrio parahaemolyticus and Salmonella typhimurium as model targets, this protocol can selectively detect 18 cfu/mL and 27 cfu/mL, respectively. Furthermore, this platform can be successfully applied to detect pathogens in seafood samples with recoveries ranging from 82.9% to 95.1%.
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Affiliation(s)
- Nuo Duan
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, China
| | - Mofei Shen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Shuo Qi
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Wenyue Wang
- China Rural Technology Development Center, Beijing 100045, China
| | - Shijia Wu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, China.
| | - Zhouping Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, China.
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28
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Sun J, Gong L, Wang W, Gong Z, Wang D, Fan M. Surface‐enhanced Raman spectroscopy for on‐site analysis: A review of recent developments. LUMINESCENCE 2020; 35:808-820. [DOI: 10.1002/bio.3796] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 02/14/2020] [Accepted: 02/25/2020] [Indexed: 12/11/2022]
Affiliation(s)
- Ji Sun
- Faculty of Geosciences and Environmental EngineeringSouthwest Jiaotong University Chengdu China
| | - Lin Gong
- Faculty of Geosciences and Environmental EngineeringSouthwest Jiaotong University Chengdu China
| | - Wenjun Wang
- Faculty of Geosciences and Environmental EngineeringSouthwest Jiaotong University Chengdu China
| | - Zhengjun Gong
- Faculty of Geosciences and Environmental EngineeringSouthwest Jiaotong University Chengdu China
| | - Dongmei Wang
- Faculty of Geosciences and Environmental EngineeringSouthwest Jiaotong University Chengdu China
| | - Meikun Fan
- Faculty of Geosciences and Environmental EngineeringSouthwest Jiaotong University Chengdu China
- State‐province Joint Engineering Laboratory of Spatial Information Technology of High‐Speed Rail Safety Chengdu China
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29
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Zhang L, Zhang P, Wang R, Zhang R, Li Z, Liu W, Wang Q, Gao M, Gui L. A Performance-Enhanced Liquid Metal-Based Microheater with Parallel Ventilating Side-Channels. MICROMACHINES 2020; 11:mi11020133. [PMID: 31991611 PMCID: PMC7074615 DOI: 10.3390/mi11020133] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 01/15/2020] [Accepted: 01/20/2020] [Indexed: 01/07/2023]
Abstract
Gallium-based liquid metal can be used as a material for microheaters because it can be easily filled into microchannels and electrified to generate Joule heat, but the liquid metal-based microheater will suffer breakage induced by voids forming within the liquid metal when the temperature normally gets higher than 100 °C. To resolve this problem, a novel liquid metal-based microheater with parallel ventilating side-channels is presented. It consists of a liquid-metal heating channel and two parallel ventilating side-channels. The heating channel is connected with the side-channels by small gaps between polydimethylsiloxane (PDMS) posts. Experimental results show that this novel microheater can be heated up to 200 °C without damage. To explain its excellent performance, an experiment is performed to discover the development of the voids within the liquid-metal heating channel, and two reasons are put forward in this work on the basis of the experiment. Afterward pressing and bending tests are conducted to explore the mechanical stability of the novel microheaters. Finally, the microheaters are applied to warm water to show their good flexibility on non-flat surfaces. In consequence, the novel liquid metal-based microheater is believed to be widely applicable to soft micro-electro-mechanical system(MEMS) heating devices.
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Affiliation(s)
- Lunjia Zhang
- Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, 29 Zhongguancun East Road, Haidian District, Beijing 100190, China; (L.Z.); (P.Z.); (R.W.); (R.Z.); (Q.W.); (M.G.)
- School of Future Technology, University of Chinese Academy of Sciences, Beijing 100039, China
- Information Science Academy, China Electronics Technology Group Corporation, Beijing 100086, China
| | - Pan Zhang
- Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, 29 Zhongguancun East Road, Haidian District, Beijing 100190, China; (L.Z.); (P.Z.); (R.W.); (R.Z.); (Q.W.); (M.G.)
- School of Future Technology, University of Chinese Academy of Sciences, Beijing 100039, China
| | - Ronghang Wang
- Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, 29 Zhongguancun East Road, Haidian District, Beijing 100190, China; (L.Z.); (P.Z.); (R.W.); (R.Z.); (Q.W.); (M.G.)
- School of Future Technology, University of Chinese Academy of Sciences, Beijing 100039, China
| | - Renchang Zhang
- Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, 29 Zhongguancun East Road, Haidian District, Beijing 100190, China; (L.Z.); (P.Z.); (R.W.); (R.Z.); (Q.W.); (M.G.)
- School of Future Technology, University of Chinese Academy of Sciences, Beijing 100039, China
| | - Zhenming Li
- Energy Storage and Novel Technology of Electrical Engineering Department, China Electric Power Research Institute, Beijing 100192, China; (Z.L.); (W.L.)
| | - Wei Liu
- Energy Storage and Novel Technology of Electrical Engineering Department, China Electric Power Research Institute, Beijing 100192, China; (Z.L.); (W.L.)
| | - Qifu Wang
- Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, 29 Zhongguancun East Road, Haidian District, Beijing 100190, China; (L.Z.); (P.Z.); (R.W.); (R.Z.); (Q.W.); (M.G.)
- School of Future Technology, University of Chinese Academy of Sciences, Beijing 100039, China
| | - Meng Gao
- Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, 29 Zhongguancun East Road, Haidian District, Beijing 100190, China; (L.Z.); (P.Z.); (R.W.); (R.Z.); (Q.W.); (M.G.)
| | - Lin Gui
- Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, 29 Zhongguancun East Road, Haidian District, Beijing 100190, China; (L.Z.); (P.Z.); (R.W.); (R.Z.); (Q.W.); (M.G.)
- School of Future Technology, University of Chinese Academy of Sciences, Beijing 100039, China
- Correspondence: ; Tel.:+86-010-82543483
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Fan M, Andrade GFS, Brolo AG. A review on recent advances in the applications of surface-enhanced Raman scattering in analytical chemistry. Anal Chim Acta 2019; 1097:1-29. [PMID: 31910948 DOI: 10.1016/j.aca.2019.11.049] [Citation(s) in RCA: 199] [Impact Index Per Article: 39.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 11/18/2019] [Accepted: 11/20/2019] [Indexed: 12/13/2022]
Abstract
This review is focused on recent developments of surface-enhanced Raman scattering (SERS) applications in Analytical Chemistry. The work covers advances in the fabrication methods of SERS substrates, including nanoparticles immobilization techniques and advanced nanopatterning with metallic features. Recent insights in quantitative and sampling methods for SERS implementation and the development of new SERS-based approaches for both qualitative and quantitative analysis are discussed. The advent of methods for pre-concentration and new approaches for single-molecule SERS quantification, such as the digital SERS procedure, has provided additional improvements in the analytical figures-of-merit for analysis and assays based on SERS. The use of metal nanostructures as SERS detection elements integrated in devices, such as microfluidic systems and optical fibers, provided new tools for SERS applications that expand beyond the laboratory environment, bringing new opportunities for real-time field tests and process monitoring based on SERS. Finally, selected examples of SERS applications in analytical and bioanalytical chemistry are discussed. The breadth of this work reflects the vast diversity of subjects and approaches that are inherent to the SERS field. The state of the field indicates the potential for a variety of new SERS-based methods and technologies that can be routinely applied in analytical laboratories.
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Affiliation(s)
- Meikun Fan
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
| | - Gustavo F S Andrade
- Centro de Estudos de Materiais, Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora, Campus Universitário s/n, CEP 36036-900, Juiz de Fora, Brazil
| | - Alexandre G Brolo
- Department of Chemistry, University of Victoria, PO Box 3055, Victoria, BC, V8W 3V6, Canada; Centre for Advanced Materials and Related Technology, University of Victoria, V8W 2Y2, Canada.
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Xu K, Zhou R, Takei K, Hong M. Toward Flexible Surface-Enhanced Raman Scattering (SERS) Sensors for Point-of-Care Diagnostics. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1900925. [PMID: 31453071 PMCID: PMC6702763 DOI: 10.1002/advs.201900925] [Citation(s) in RCA: 227] [Impact Index Per Article: 45.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2019] [Revised: 05/26/2019] [Indexed: 05/18/2023]
Abstract
Surface-enhanced Raman scattering (SERS) spectroscopy provides a noninvasive and highly sensitive route for fingerprint and label-free detection of a wide range of molecules. Recently, flexible SERS has attracted increasingly tremendous research interest due to its unique advantages compared to rigid substrate-based SERS. Here, the latest advances in flexible substrate-based SERS diagnostic devices are investigated in-depth. First, the intriguing prospect of point-of-care diagnostics is briefly described, followed by an introduction to the cutting-edge SERS technique. Then, the focus is moved from conventional rigid substrate-based SERS to the emerging flexible SERS technique. The main part of this report highlights the recent three categories of flexible SERS substrates, including actively tunable SERS, swab-sampling strategy, and the in situ SERS detection approach. Furthermore, other promising means of flexible SERS are also introduced. The flexible SERS substrates with low-cost, batch-fabrication, and easy-to-operate characteristics can be integrated into portable Raman spectroscopes for point-of-care diagnostics, which are conceivable to penetrate global markets and households as next-generation wearable sensors in the near future.
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Affiliation(s)
- Kaichen Xu
- Department of Electrical and Computer EngineeringNational University of Singapore4 Engineering Drive 3Singapore117576Singapore
- Department of Physics and ElectronicsOsaka Prefecture University SakaiOsaka599‐8531Japan
| | - Rui Zhou
- School of Aerospace EngineeringXiamen University422 Siming South Road, Siming DistrictXiamenFujian361005P. R. China
| | - Kuniharu Takei
- Department of Physics and ElectronicsOsaka Prefecture University SakaiOsaka599‐8531Japan
| | - Minghui Hong
- Department of Electrical and Computer EngineeringNational University of Singapore4 Engineering Drive 3Singapore117576Singapore
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Sensitive surface-enhanced Raman scattering detection of atrazine based on aggregation of silver nanoparticles modified carbon dots. Talanta 2019; 201:46-51. [DOI: 10.1016/j.talanta.2019.03.108] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 03/27/2019] [Accepted: 03/30/2019] [Indexed: 02/06/2023]
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Wu H, Luo Y, Hou C, Huo D, Wang W, Zhao J, Lei Y. Rapid and fingerprinted monitoring of pesticide methyl parathion on the surface of fruits/leaves as well as in surface water enabled by gold nanorods based casting-and-sensing SERS platform. Talanta 2019; 200:84-90. [DOI: 10.1016/j.talanta.2019.03.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2018] [Revised: 02/26/2019] [Accepted: 03/01/2019] [Indexed: 12/24/2022]
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Jiao A, Dong X, Zhang H, Xu L, Tian Y, Liu X, Chen M. Construction of pure worm-like AuAg nanochains for ultrasensitive SERS detection of pesticide residues on apple surfaces. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 209:241-247. [PMID: 30414572 DOI: 10.1016/j.saa.2018.10.051] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 10/23/2018] [Accepted: 10/28/2018] [Indexed: 06/09/2023]
Abstract
Ultrasensitive detection of pesticide residues on agricultural products using surface-enhanced Raman spectroscopy (SERS) is of significant interest in food security. Herein, worm-like AuAg nanochains with highly interconnected ultrafine (~6.2 nm) bimetallic particles were developed as an excellent SERS nanosensor via laser-assisted strategy. The SERS detection limit of thiram molecules on apple surfaces is about 10-7 M (0.03 ppm), which is about 200 times lower than the maximal residue limit (MRL, 7 ppm) in fruit prescribed by the U.S. Environmental Protection Agency (EPA). Importantly, the established excellent linear relationships between the SERS intensities and thiram concentrations can sensitively monitor the slight variation of pesticide residues in agriculture.
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Affiliation(s)
- Anxin Jiao
- School of Physics, State Key laboratory of Crystal Materials, Shandong University, Shandong, Jinan 250100, PR China
| | - Xuejian Dong
- School of Physics, State Key laboratory of Crystal Materials, Shandong University, Shandong, Jinan 250100, PR China
| | - Hua Zhang
- School of Physics, State Key laboratory of Crystal Materials, Shandong University, Shandong, Jinan 250100, PR China
| | - Linlin Xu
- School of Physics, State Key laboratory of Crystal Materials, Shandong University, Shandong, Jinan 250100, PR China
| | - Yue Tian
- School of Physics, State Key laboratory of Crystal Materials, Shandong University, Shandong, Jinan 250100, PR China
| | - Xiangdong Liu
- School of Physics, State Key laboratory of Crystal Materials, Shandong University, Shandong, Jinan 250100, PR China
| | - Ming Chen
- School of Physics, State Key laboratory of Crystal Materials, Shandong University, Shandong, Jinan 250100, PR China.
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