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Wei LN, Luo L, Wang BZ, Lei HT, Guan T, Shen YD, Wang H, Xu ZL. Biosensors for detection of paralytic shellfish toxins: Recognition elements and transduction technologies. Trends Food Sci Technol 2023. [DOI: 10.1016/j.tifs.2023.02.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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Noureen B, Ullah N, Tian Y, Du L, Chen W, Wu C, Wang P. An electrochemical PAH-modified aptasensor for the label-free and highly-sensitive detection of saxitoxin. Talanta 2022; 240:123185. [PMID: 34973551 DOI: 10.1016/j.talanta.2021.123185] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 12/22/2021] [Accepted: 12/26/2021] [Indexed: 01/19/2023]
Abstract
Saxitoxin (STX), is one of the most dangerous and widespread paralytic shellfish toxins, causing a severe threat to the ecosystem and human health. So, it is important and highly essential to develop novel techniques for STX detection in a convenient, desirable, and low-cost manner. Herein, this study developed an electrolyte-insulator-semiconductor (EIS) sensor covered with a layer-by-layer prepared, positively-charged weak polyelectrolyte layer of poly (allylamine hydrochloride) (PAH) for the label-free detection of STX. The specific aptamer (Apt) sensitive to STX was electrostatically adsorbed onto the PAH layer. This leads to a preferentially flat orientation of the Apt within the Debye length, thus yielding a reduced charge-screening influence and a higher sensor signal. Each step of sensor surface modification, i.e. PAH adsorption, immobilization of Apt, and attachment of STX, was monitored by capacitance-voltage (C-V) and constant-capacitance (ConCap) measurements. Furthermore, atomic force microscopy (AFM) was employed to characterize the surface morphology and roughness of the PAH layer. Fluorescence microscopy was used to confirm the effective immobilization of Apt onto the PAH-modified EIS sensor. The results showed that the detection range of this aptasensor for STX detection was 0.5-100 nM and the detection limit was as low as 0.05 nM. Furthermore, this aptasensor showed good selectivity and 9 days' stability. The mussel tissue extraction test suggested that this aptasensor can be used to detect STX in real samples. This aptasensor provides a convenient approach for moderate, rapid, and label-free detection of marine biological toxins.
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Affiliation(s)
- Beenish Noureen
- Institute of Medical Engineering, Department of Biophysics, School of Basic Medical Science, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China
| | - Najeeb Ullah
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China
| | - Yulan Tian
- Institute of Medical Engineering, Department of Biophysics, School of Basic Medical Science, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China
| | - Liping Du
- Institute of Medical Engineering, Department of Biophysics, School of Basic Medical Science, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China; Biosensor National Special Laboratory, Key Laboratory for Biomedical Engineering of Ministry of Education, Department of Biomedical Engineering, Zhejiang University, Hangzhou, 310027, China.
| | - Wei Chen
- Institute of Medical Engineering, Department of Biophysics, School of Basic Medical Science, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China
| | - Chunsheng Wu
- Institute of Medical Engineering, Department of Biophysics, School of Basic Medical Science, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China.
| | - Ping Wang
- Biosensor National Special Laboratory, Key Laboratory for Biomedical Engineering of Ministry of Education, Department of Biomedical Engineering, Zhejiang University, Hangzhou, 310027, China.
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Vaz R, Valpradinhos B, Frasco MF, Sales MGF. Emerging Optical Materials in Sensing and Discovery of Bioactive Compounds. SENSORS (BASEL, SWITZERLAND) 2021; 21:5784. [PMID: 34502675 PMCID: PMC8434157 DOI: 10.3390/s21175784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 08/20/2021] [Accepted: 08/22/2021] [Indexed: 11/16/2022]
Abstract
Optical biosensors are used in numerous applications and analytical fields. Advances in these sensor platforms offer high sensitivity, selectivity, miniaturization, and real-time analysis, among many other advantages. Research into bioactive natural products serves both to protect against potentially dangerous toxic compounds and to promote pharmacological innovation in drug discovery, as these compounds have unique chemical compositions that may be characterized by greater safety and efficacy. However, conventional methods for detecting these biomolecules have drawbacks, as they are time-consuming and expensive. As an alternative, optical biosensors offer a faster, simpler, and less expensive means of detecting various biomolecules of clinical interest. In this review, an overview of recent developments in optical biosensors for the detection and monitoring of aquatic biotoxins to prevent public health risks is first provided. In addition, the advantages and applicability of these biosensors in the field of drug discovery, including high-throughput screening, are discussed. The contribution of the investigated technological advances in the timely and sensitive detection of biotoxins while deciphering the pathways to discover bioactive compounds with great health-promoting prospects is envisaged to meet the increasing demands of healthcare systems.
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Affiliation(s)
- Raquel Vaz
- BioMark@UC, Faculty of Sciences and Technology, University of Coimbra, 3030-790 Coimbra, Portugal; (R.V.); (M.G.F.S.)
- CEB—Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal;
| | - Beatriz Valpradinhos
- CEB—Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal;
- BioMark@ISEP, School of Engineering, Polytechnic Institute of Porto, 4249-015 Porto, Portugal
| | - Manuela F. Frasco
- BioMark@UC, Faculty of Sciences and Technology, University of Coimbra, 3030-790 Coimbra, Portugal; (R.V.); (M.G.F.S.)
- CEB—Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal;
- BioMark@ISEP, School of Engineering, Polytechnic Institute of Porto, 4249-015 Porto, Portugal
| | - Maria Goreti F. Sales
- BioMark@UC, Faculty of Sciences and Technology, University of Coimbra, 3030-790 Coimbra, Portugal; (R.V.); (M.G.F.S.)
- CEB—Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal;
- BioMark@ISEP, School of Engineering, Polytechnic Institute of Porto, 4249-015 Porto, Portugal
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Nekvapil F, Bunge A, Barbu Tudoran L, Cintă Pinzaru S. Single-cell Raman micro-spectroscopy for tracking of carotenoids in cyanobacteria exposed to Mn and Zn doped ferrite nanoparticles. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 254:119607. [PMID: 33713907 DOI: 10.1016/j.saa.2021.119607] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 02/03/2021] [Accepted: 02/05/2021] [Indexed: 06/12/2023]
Abstract
Ferrite nanoparticles are increasingly produced and exploited as adsorbents for environmental pollutants. However, their impact on the aquatic microbiota such as cyanobacteria, are not yet investigated. Targeting the environmental monitoring context, in this paper we explored for the first time if any change in the carotenoid signal from cyanobacteria Coelomoron pussilum (AICB 1012) exposed to non-lethal doses of Mn and Zn doped ferrite nanoparticles (NPs) can be associated with the nano-aggression on single-cell level, using micro-Raman spectroscopy. UV-Vis absorption spectroscopy of the bulk culture and single-cell Raman microscopy showed that the carotenoid signal increases relative to the chlorophyll contribution upon exposure of the cells to the Mn-ferrite NPs throughout the 7 days of the experiment. The red-shift and broadening of the strongest carotenoid Raman band arising from (CC) stretching modes indicates the change of carotenoid profile towards increased amount of β-carotene in answer to the NPs stress. The increase of this band intensity relative to the fluorescence background was also observed in Zn-ferrite NPs treatment. Using a simplified and rapid sample preparation procedure, electron microscopy in both transmission and scanning modes, showed greater coverage of the cells by the stable colloidal AgNPs than by the magnetic ferrite NPs. The latter mostly clumped together rather than adhering to the cells. The combined single-cell micro-Raman tracking of physiological response of the unicellular photosynthetic microorganisms coupled with electron microscopy approach to visualise cell-NPs interaction and the extracellular polymeric substance secretion holds the promise for rapid assessment of the NPs-induced environmental stress acting on the unicellular organisms.
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Affiliation(s)
- Fran Nekvapil
- Biomolecular Physics Department, Babeş-Bolyai University, Str. Kogălniceanu no. 1, 400084 Cluj-Napoca, Romania; Physics of Nanostructured Systems Department, National Institute for Research and Development of Isotopic and Molecular Technologies, Str. Donath no. 67-103, 400293 Cluj-Napoca; RDI Laboratory of Applied Raman Spectroscopy, RDI Institute of Applied Natural Sciences (IRDI-ANS), Babeş-Bolyai University, Fântânele 42, 400293 Cluj-Napoca, Romania
| | - Alexander Bunge
- Physics of Nanostructured Systems Department, National Institute for Research and Development of Isotopic and Molecular Technologies, Str. Donath no. 67-103, 400293 Cluj-Napoca
| | - Lucian Barbu Tudoran
- Electron Microscopy Centre, Babeș-Bolyai University, Clinicilor 5-7, 400006 Cluj-Napoca, Romania; Advanced Research and Technology Center for Alternative Energy, National Institute for Research and Development of Isotopic and Molecular Technologies, Donat 67-103, 400293 Cluj-Napoca, Romania
| | - Simona Cintă Pinzaru
- Biomolecular Physics Department, Babeş-Bolyai University, Str. Kogălniceanu no. 1, 400084 Cluj-Napoca, Romania; RDI Laboratory of Applied Raman Spectroscopy, RDI Institute of Applied Natural Sciences (IRDI-ANS), Babeş-Bolyai University, Fântânele 42, 400293 Cluj-Napoca, Romania.
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Cook AL, Haycook CP, Locke AK, Mu RR, Giorgio TD. Optimization of electron beam-deposited silver nanoparticles on zinc oxide for maximally surface enhanced Raman spectroscopy. NANOSCALE ADVANCES 2021; 3:407-417. [PMID: 36131740 PMCID: PMC9417751 DOI: 10.1039/d0na00563k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Accepted: 10/28/2020] [Indexed: 06/13/2023]
Abstract
Surface enhanced Raman spectroscopy enables robust, rapid analysis on highly dilute samples. To be useful, the technique needs sensing substrates that will enhance intrinsically weak Raman signals of trace analytes. In particular, three-dimensional substrates such as zinc oxide nanowires decorated with electron-beam deposited silver nanoparticles are easily fabricated and serve the dual need of structural stability and detection sensitivity. However, little has been done to optimize electron beam-deposited silver nanoparticles for maximal surface enhancement in the unique dielectric environment of the zinc oxide substrate. Herein, fabrication and anneal parameters of electron beam-deposited silver nanoparticles were examined for the purpose of maximizing surface enhancement. Specifically, this work explored the effect of changing film thickness, deposition rate, anneal temperature, and anneal time on the surface plasmon resonance of Ag nanoparticles. In this study, multiple sets of fabrication and annealing parameters were discovered that optimized surface plasmon resonance for maximal enhancement to Raman signals acquired with a 532 nm laser. This work represents the first characterization of the fabrication and annealing parameters for electron beam-deposited silver nanoparticles on zinc oxide.
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Affiliation(s)
- Andrew L Cook
- Department of Biomedical Engineering, Vanderbilt University Nashville TN 37235 USA
| | | | - Andrea K Locke
- Department of Biomedical Engineering, Vanderbilt University Nashville TN 37235 USA
| | - Richard R Mu
- TSU Interdisciplinary Graduate Engineering Research (TIGER) Institute, Tennessee State University Nashville TN 37209 USA
| | - Todd D Giorgio
- Department of Biomedical Engineering, Vanderbilt University Nashville TN 37235 USA
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Application of surface-enhanced Raman spectroscopy in fast detection of toxic and harmful substances in food. Biosens Bioelectron 2020; 167:112480. [PMID: 32798805 DOI: 10.1016/j.bios.2020.112480] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 07/20/2020] [Accepted: 07/26/2020] [Indexed: 01/28/2023]
Abstract
Surface-enhanced Raman spectroscopy (SERS) is being considered as a powerful technique in the area of food safety due to its rapidity, sensitivity, portability, and non-destructive features. This review aims to provide a comprehensive understanding of SERS applications in fast detection of toxic and harmful substances in food matrix. The enhancement mechanism of SERS, classification of active substrates, detection methods, and their advantages and disadvantages are briefly discussed in the review. The latest research progress of fast SERS detection of food-borne pathogens, mycotoxins, shellfish toxins, illegal food additives, and drug residues are highlighted in sections of the review. According to the current status of SERS detection of food-derived toxic and harmful substances, the review comes up with certain problems to be urgently resolved in SERS and brings up the perspectives on the future directions of SERS based biosensors.
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Cys-functionalized AuNP substrates for improved sensing of the marine toxin STX by dynamic surface-enhanced Raman spectroscopy. Anal Bioanal Chem 2020; 412:4609-4617. [PMID: 32548768 DOI: 10.1007/s00216-020-02710-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 05/12/2020] [Accepted: 05/14/2020] [Indexed: 10/24/2022]
Abstract
Saxitoxin (STX) as one of the most harmful and typical paralytic shellfish toxins, is posing a serious threat to environmental and human health, thus it is essential to develop a sensitive and reliable analytical method for STX detection. Herein, we proposed a strategy for rapid and sensitive detection of STX with surface-enhanced Raman spectroscopy (SERS), by employing cysteine modified gold nanoparticles (Cys-AuNPs) as SERS probe to capture STX molecules through electrostatic interactions and multiple hydrogen bonds between Cys and STX molecules. Moreover, the XPS and zeta potential results indicated that Cys could bond to AuNPs through Au-S bonds and the addition of STX could induce the efficient aggregation of Cys-AuNPs owing to the presence of electrostatic interactions and multiple hydrogen bonds between Cys and STX molecules. Furthermore, considering the high sensitivity and stability of the dynamic surface-enhanced Raman spectroscopy (D-SERS) strategy with the formation of a 3D hotspot matrix, the highly sensitive detection of STX was realized to a level of 1 × 10-7 M by using the D-SERS strategy. Consequently, Cys-AuNPs as high affinity substrates can provide high sensitivity for the detection of STX through the D-SERS strategy. Graphical abstract.
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Cheng S, Zheng B, Yao D, Wang Y, Tian J, Liu L, Liang H, Ding Y. Determination of Saxitoxin by Aptamer-Based Surface-Enhanced Raman Scattering. ANAL LETT 2019. [DOI: 10.1080/00032719.2018.1505900] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Sheng Cheng
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Anhui Key Laboratory of Advanced Functional Materials and Devices, Hefei University of Technology, Hefei, China
- Instrumental Analysis Center, Hefei University of Technology, Hefei, China
| | - Bin Zheng
- School of Chemistry and Chemical Engineering, Hefei Normal University, Hefei, China
| | - Dongbao Yao
- Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, China
| | - Yang Wang
- Instrumental Analysis Center, Hefei University of Technology, Hefei, China
| | - Jingjing Tian
- Instrumental Analysis Center, Hefei University of Technology, Hefei, China
| | - Lanhua Liu
- Instrumental Analysis Center, Hefei University of Technology, Hefei, China
| | - Haojun Liang
- Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, China
| | - Yunsheng Ding
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Anhui Key Laboratory of Advanced Functional Materials and Devices, Hefei University of Technology, Hefei, China
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Cheng S, Zheng B, Yao D, Kuai S, Tian J, Liang H, Ding Y. Study of the binding way between saxitoxin and its aptamer and a fluorescent aptasensor for detection of saxitoxin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 204:180-187. [PMID: 29933153 DOI: 10.1016/j.saa.2018.06.036] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Revised: 06/07/2018] [Accepted: 06/10/2018] [Indexed: 06/08/2023]
Abstract
Aptamers could be used to construct simple and effective biosensor because the conformational switch of aptamer upon target binding is easy to be transferred to optical or electrochemical signals. Nevertheless, we found that the binding between saxitoxin (STX) and aptamer (M-30f) is not accompanied with conformational switch. Here, the circular dichroism spectra, fluorophore and quencher labeled aptamer, and crystal violet-based assays were used to identify the binding way between STX and aptamer. The results show that the conformation of aptamer is stabilized in PBS buffer (10 mM phosphate buffer, 2.7 mM KCl, 137 mM NaCl, pH 7.4) and this conformation may provide an exactly suitable cave for STX binding. Through the analysis of UV-melting curves and circular dichroism-melting curves, it is found that different concentrations of STX produce different unfolding extents of the aptamer under high temperature. Then, a simple temperature-assisted "turn-on" fluorescent aptasensor was developed to detect STX and the application in real sample detection demonstrates its feasibility. The proposed method provides not only an alternative for STX detection but also a strategy for simple aptasensor design using aptamers that do not switch conformation upon targets binding.
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Affiliation(s)
- Sheng Cheng
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Anhui Key Laboratory of Advanced Functional Materials and Devices, Hefei University of Technology, Hefei, Anhui 230009, PR China
| | - Bin Zheng
- School of Chemistry and Chemical Engineering, Hefei Normal University, Hefei, Anhui 230061, PR China.
| | - Dongbao Yao
- Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, PR China
| | - Shenglong Kuai
- Anhui Technical College of Water Resources and Hydroelectric Power, Hefei, Anhui 231603, PR China
| | - Jingjing Tian
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Anhui Key Laboratory of Advanced Functional Materials and Devices, Hefei University of Technology, Hefei, Anhui 230009, PR China
| | - Haojun Liang
- Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, PR China
| | - Yunsheng Ding
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Anhui Key Laboratory of Advanced Functional Materials and Devices, Hefei University of Technology, Hefei, Anhui 230009, PR China.
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Eremina OE, Semenova AA, Sergeeva EA, Brazhe NA, Maksimov GV, Shekhovtsova TN, Goodilin EA, Veselova IA. Surface-enhanced Raman spectroscopy in modern chemical analysis: advances and prospects. RUSSIAN CHEMICAL REVIEWS 2018. [DOI: 10.1070/rcr4804] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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12
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Yaseen T, Pu H, Sun DW. Functionalization techniques for improving SERS substrates and their applications in food safety evaluation: A review of recent research trends. Trends Food Sci Technol 2018. [DOI: 10.1016/j.tifs.2017.12.012] [Citation(s) in RCA: 134] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Bian H, Wang P, Wang J, Yin H, Tian Y, Bai P, Wu X, Wang N, Tang Y, Gao J. Discrimination of human and nonhuman blood using Raman spectroscopy with self-reference algorithm. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:1-7. [PMID: 28936824 DOI: 10.1117/1.jbo.22.9.095006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Accepted: 09/05/2017] [Indexed: 06/07/2023]
Abstract
We report a self-reference algorithm to discriminate human and nonhuman blood by calculating the ratios of identification Raman peaks to reference Raman peaks and choosing appropriate threshold values. The influence of using different reference peaks and identification peaks was analyzed in detail. The Raman peak at 1003 cm-1 was proved to be a stable reference peak to avoid the influencing factors, such as the incident laser intensity and the amount of sample. The Raman peak at 1341 cm-1 was found to be an efficient identification peak, which indicates that the difference between human and nonhuman blood results from the C-H bend in tryptophan. The comparison between self-reference algorithm and partial least square method was made. It was found that the self-reference algorithm not only obtained the discrimination results with the same accuracy, but also provided information on the difference of chemical composition. In addition, the performance of self-reference algorithm whose true positive rate is 100% is significant for customs inspection to avoid genetic disclosure and forensic science.
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Affiliation(s)
- Haiyi Bian
- Chinese Academy of Sciences, Jiangsu Key Laboratory of Medical Optics, Suzhou Institute of Biomedica, China
| | - Peng Wang
- Chinese Academy of Sciences, Jiangsu Key Laboratory of Medical Optics, Suzhou Institute of Biomedica, China
| | - Jun Wang
- Chinese Academy of Sciences, CAS Key Lab of Biomedical Diagnostics, Suzhou Institute of Biomedical E, China
| | - Huancai Yin
- Chinese Academy of Sciences, CAS Key Lab of Biomedical Diagnostics, Suzhou Institute of Biomedical E, China
| | - Yubing Tian
- Chinese Academy of Sciences, Jiangsu Key Laboratory of Medical Optics, Suzhou Institute of Biomedica, China
| | - Pengli Bai
- Chinese Academy of Sciences, CAS Key Lab of Biomedical Diagnostics, Suzhou Institute of Biomedical E, China
| | - Xiaodong Wu
- Chinese Academy of Sciences, Jiangsu Key Laboratory of Medical Optics, Suzhou Institute of Biomedica, China
| | - Ning Wang
- Chinese Academy of Sciences, Jiangsu Key Laboratory of Medical Optics, Suzhou Institute of Biomedica, China
- Shanghai University, School of Mechatronic Engineering and Automation, Shanghai, China
| | - Yuguo Tang
- Chinese Academy of Sciences, Jiangsu Key Laboratory of Medical Optics, Suzhou Institute of Biomedica, China
- Chinese Academy of Sciences, CAS Key Lab of Biomedical Diagnostics, Suzhou Institute of Biomedical E, China
| | - Jing Gao
- Chinese Academy of Sciences, Jiangsu Key Laboratory of Medical Optics, Suzhou Institute of Biomedica, China
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Xie X, Pu H, Sun DW. Recent advances in nanofabrication techniques for SERS substrates and their applications in food safety analysis. Crit Rev Food Sci Nutr 2017; 58:2800-2813. [DOI: 10.1080/10408398.2017.1341866] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Xiaohui Xie
- School of Food Science and Engineering, South China University of Technology, Guangzhou, China
- Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou, China
- Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods
| | - Hongbin Pu
- School of Food Science and Engineering, South China University of Technology, Guangzhou, China
- Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou, China
- Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods
| | - Da-Wen Sun
- School of Food Science and Engineering, South China University of Technology, Guangzhou, China
- Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou, China
- Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods
- 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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Office paper decorated with silver nanostars - an alternative cost effective platform for trace analyte detection by SERS. Sci Rep 2017; 7:2480. [PMID: 28559536 PMCID: PMC5449394 DOI: 10.1038/s41598-017-02484-8] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Accepted: 03/30/2017] [Indexed: 12/02/2022] Open
Abstract
For analytical applications in portable sensors to be used in the point-of-need, low-cost SERS substrates using paper as a base, are an alternative. In this work, SERS substrates were produced on two different types of paper: a high porosity paper (Whatman no. 1); and a low porosity paper (commercially available office paper, Portucel Soporcel). Solutions containing spherical silver nanoparticles (AgNPs) and silver nanostars (AgNSs) were separately drop-casted on hydrophilic wells patterned on the papers. The porosity of the paper was found to play a determinant role on the AgNP and AgNS distribution along the paper fibres, with most of the nanoparticles being retained at the illuminated surface of the office paper substrate. The highest SERS enhancements were obtained for the office paper substrate, with deposited AgNSs. A limit of detection for rhodamine-6G as low as 11.4 ± 0.2 pg could be achieved, with an analytical enhancement factor of ≈107 for this specific analyte. The well patterning technique allowed good signal uniformity (RSD of 1.7%). Besides, these SERS substrates remained stable after 5 weeks of storage (RSD of 7.3%). Paper-induced aggregation of AgNPs was found to be a viable alternative to the classical salt-induced aggregation, to obtain a highly sensitive SERS substrates.
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Halvorson RA, Vikesland PJ. Surface-enhanced Raman spectroscopy (SERS) for environmental analyses. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2010; 44:7749-55. [PMID: 20836559 DOI: 10.1021/es101228z] [Citation(s) in RCA: 238] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Affiliation(s)
- Rebecca A Halvorson
- Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, USA
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