51
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Fan M, Cheng F, Wang C, Gong Z, Tang C, Man C, Brolo AG. SERS optrode as a “fishing rod” to direct pre-concentrate analytes from superhydrophobic surfaces. Chem Commun (Camb) 2015; 51:1965-8. [DOI: 10.1039/c4cc07928k] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
SERS optrodes were used to “fish” aqueous drops from superhydrophobic surfaces, which led to an improvement of 2–3 orders of magnitude in sensitivity. 20 pg of the pesticide triazophos was detected by this method.
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Affiliation(s)
- Meikun Fan
- Faculty of Geosciences and Environmental Engineering
- Southwest Jiaotong University
- Chengdu
- China
| | - Fansheng Cheng
- Chengdu Green Energy and Green Manufacturing R&D Centre
- Chengdu
- China
| | - Cong Wang
- Chengdu Green Energy and Green Manufacturing R&D Centre
- Chengdu
- China
| | - Zhengjun Gong
- Faculty of Geosciences and Environmental Engineering
- Southwest Jiaotong University
- Chengdu
- China
| | - Changyu Tang
- Chengdu Green Energy and Green Manufacturing R&D Centre
- Chengdu
- China
| | - Changzhen Man
- Chengdu Green Energy and Green Manufacturing R&D Centre
- Chengdu
- China
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52
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Polystyrene/Ag nanoparticles as dynamic surface-enhanced Raman spectroscopy substrates for sensitive detection of organophosphorus pesticides. Talanta 2014; 127:269-75. [DOI: 10.1016/j.talanta.2014.03.075] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Revised: 03/23/2014] [Accepted: 03/29/2014] [Indexed: 11/20/2022]
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53
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Hayat A, Marty JL. Disposable screen printed electrochemical sensors: tools for environmental monitoring. SENSORS (BASEL, SWITZERLAND) 2014; 14:10432-53. [PMID: 24932865 PMCID: PMC4118360 DOI: 10.3390/s140610432] [Citation(s) in RCA: 170] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2014] [Revised: 06/03/2014] [Accepted: 06/05/2014] [Indexed: 12/04/2022]
Abstract
Screen printing technology is a widely used technique for the fabrication of electrochemical sensors. This methodology is likely to underpin the progressive drive towards miniaturized, sensitive and portable devices, and has already established its route from "lab-to-market" for a plethora of sensors. The application of these sensors for analysis of environmental samples has been the major focus of research in this field. As a consequence, this work will focus on recent important advances in the design and fabrication of disposable screen printed sensors for the electrochemical detection of environmental contaminants. Special emphasis is given on sensor fabrication methodology, operating details and performance characteristics for environmental applications.
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Affiliation(s)
- Akhtar Hayat
- Images, Universite´De Perpignan Via Domitia, 52 Avenue Paul Alduy, Perpignan Cedex 66860, France.
| | - Jean Louis Marty
- Images, Universite´De Perpignan Via Domitia, 52 Avenue Paul Alduy, Perpignan Cedex 66860, France.
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54
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Song W, Li H, Liang H, Qiang W, Xu D. Disposable electrochemical aptasensor array by using in situ DNA hybridization inducing silver nanoparticles aggregate for signal amplification. Anal Chem 2014; 86:2775-83. [PMID: 24490908 DOI: 10.1021/ac500011k] [Citation(s) in RCA: 90] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Nanomaterials as tracing tags have been widely used in biosensors with high sensitivity and selectivity. In this work, a signal amplification electrochemical aptamer sensing strategy for the detection of protein was designed by combining the hybridization-inducing aggregate of DNA-functionalized silver nanoparticles (AgNPs) and differential pulse stripping voltammetry (DPSV) detection. The multiprobes containing hybridization DNA and aptamers were anchored onto the silver nanoparticles. The protein assay was prepared through the immobilization of capture aptamer that specifically recognizes platelet-derived growth factor (PDGF-BB) on gold nanoparticles modified screen-printed electrode (SPE) array. After a sandwich-type reaction, two kinds of DNA-modified AgNPs were simultaneously added on the electrode surface for specifically recognizing PDGF-BB and forming the AgNPs aggregate caused by in situ hybridization of DNA. Compared to the signal-labeled tag, the tracing aggregate tags showed a strong electroactivity for signal amplification through stripping detection of silver after preoxidation. By using the hybridization-inducing aggregate as electrochemical readouts, the sensor showed wide linear range and low detection limit. The hybridization-inducing AgNPs aggregate were further used as tracing tags in multiplied proteins assays for PDGF-BB and thrombin by using the SPE array chip as sensing platform. The cross-talk between different aptamer-modified electrodes on the same array was avoided because of the advantage of labeled AgNPs. The array detection was also applied in the logic gate operation. The proposed method described here is ideal for multianalytes determination in clinical diagnostics with good analytical performance.
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Affiliation(s)
- Wei Song
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University , 22 Hankou Road, Nanjing, Jiangsu 210093, People's Republic of China
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55
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Li P, Liu H, Yang L, Liu J. The time-resolved D-SERS vibrational spectra of pesticide thiram. Talanta 2013; 117:39-44. [DOI: 10.1016/j.talanta.2013.08.050] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Revised: 08/19/2013] [Accepted: 08/28/2013] [Indexed: 11/16/2022]
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56
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Li DW, Zhai WL, Li YT, Long YT. Recent progress in surface enhanced Raman spectroscopy for the detection of environmental pollutants. Mikrochim Acta 2013. [DOI: 10.1007/s00604-013-1115-3] [Citation(s) in RCA: 203] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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57
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Xue JQ, Li DW, Qu LL, Long YT. Surface-imprinted core-shell Au nanoparticles for selective detection of bisphenol A based on surface-enhanced Raman scattering. Anal Chim Acta 2013; 777:57-62. [PMID: 23622965 DOI: 10.1016/j.aca.2013.03.037] [Citation(s) in RCA: 101] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2012] [Revised: 03/09/2013] [Accepted: 03/14/2013] [Indexed: 10/27/2022]
Abstract
Surface-imprinted core-shell Au nanoparticles (AuNPs) were explored for the highly selective detection of bisphenol A (BPA) by surface-enhanced Raman scattering (SERS). A triethoxysilane-template complex (BPA-Si) was synthesized and then utilized to fabricate a molecularly imprinted polymer (MIP) layer on the AuNPs via a sol-gel process. The imprinted BPA molecules were removed by a simple thermal treatment to generated the imprint-removed material, MIP-ir-AuNPs, with the desired recognition sites that could selectively rebind the BPA molecules. The morphological and polymeric characteristics of MIP-ir-AuNPs were investigated by transmission electron microscopy and Fourier-transform infrared spectroscopy. The results demonstrated that the MIP-ir-AuNPs were fabricated with a 2 nm MIP shell layer within which abundant amine groups were generated. The rebinding kinetics study showed that the MIP-ir-AuNPs could reach the equilibrium adsorption for BPA within 10 min owning to the advantage of ultrathin core-shell nanostructure. Moreover, a linear relationship between SERS intensity and the concentration of BPA on the MIP-ir-AuNPs was observed in the range of 0.5-22.8 mg L(-1), with a detection limit of 0.12 mg L(-1) (blank±3×s.d.). When applied to SERS detection, the developed surface-imprinted core-shell MIP-ir-AuNPs could recognize BPA and prevent interference from the structural analogues such as hexafluorobisphenol A (BPAF) and diethylstilbestrol (DES). These results revealed that the proposed method displayed significant potential utility in rapid and selective detection of BPA in real samples.
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Affiliation(s)
- Jin-Qun Xue
- State Key Laboratory of Bioreactor Engineering & Department of Chemistry, East China University of Science and Technology, Shanghai 200237, PR China
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58
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Davies RA, Chong NS, Ooi BG. Chemical Enhancement of the Surface Enhanced Raman Scattering Signals of Anilines via Their <i>Ortho</i>-Substituents. ACTA ACUST UNITED AC 2013. [DOI: 10.4236/opj.2013.35a003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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59
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Ando J, Yano TA, Fujita K, Kawata S. Metal nanoparticles for nano-imaging and nano-analysis. Phys Chem Chem Phys 2013; 15:13713-22. [DOI: 10.1039/c3cp51806j] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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60
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Li YT, Qu LL, Li DW, Song QX, Fathi F, Long YT. Rapid and sensitive in-situ detection of polar antibiotics in water using a disposable Ag-graphene sensor based on electrophoretic preconcentration and surface-enhanced Raman spectroscopy. Biosens Bioelectron 2012; 43:94-100. [PMID: 23287654 DOI: 10.1016/j.bios.2012.12.005] [Citation(s) in RCA: 110] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2012] [Revised: 12/03/2012] [Accepted: 12/03/2012] [Indexed: 11/25/2022]
Abstract
A disposable Ag-graphene sensor was developed for rapid and sensitive in-situ detection of polar antibiotics in water using electrophoretic preconcentration (EP) and surface-enhanced Raman spectroscopy (SERS). The Ag-graphene sensor was fabricated by depositing Ag-graphene nanocomposites synthesized through a facile one-pot method on the disposable screen-printed electrodes (SPEs) and characterized by transmission electron microscopy (TEM) and atomic force microscopy (AFM). SERS properties and detection applicability of the developed sensor were systematically investigated. It is shown that the polar antibiotics can be selectively adsorbed on the oppositely charged sensors after applying different potentials during the EP procedure, and the SERS signals of antibiotics with an effective amplification can be achieved with proper time of preconcentration. Moreover, the Ag-graphene sensor could facilitate the molecule adsorption through weak π-π interactions between graphene and antibiotics, further improving the sensitivity of SERS detection. Under the optimum EP conditions, the representative SERS spectra of a mixed solution containing four different antibiotics can be obtained within 10 min, and each antibiotic is easily distinguished by its characteristic peaks with a sub-nM detection level. The results demonstrate that the proposed disposable Ag-graphene sensor based on EP-SERS can be used for rapid and sensitive in-situ detection of polar antibiotics in aqueous samples without a pre-separation step.
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Affiliation(s)
- Yuan-Ting Li
- State Key Laboratory of Bioreactor Engineering and Department of Chemistry, East China University of Science and Technology,130 Meilong Road, Shanghai 200237, PR China
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61
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González-Diéguez N, Colina A, López-Palacios J, Heras A. Spectroelectrochemistry at Screen-Printed Electrodes: Determination of Dopamine. Anal Chem 2012; 84:9146-53. [DOI: 10.1021/ac3018444] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Noelia González-Diéguez
- Department of Chemistry, Universidad de Burgos, Pza. Misael Bañuelos
s/n, E-09001 Burgos, Spain
| | - Alvaro Colina
- Department of Chemistry, Universidad de Burgos, Pza. Misael Bañuelos
s/n, E-09001 Burgos, Spain
| | - Jesús López-Palacios
- Department of Chemistry, Universidad de Burgos, Pza. Misael Bañuelos
s/n, E-09001 Burgos, Spain
| | - Aránzazu Heras
- Department of Chemistry, Universidad de Burgos, Pza. Misael Bañuelos
s/n, E-09001 Burgos, Spain
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62
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Recent developments and applications of screen-printed electrodes in environmental assays—A review. Anal Chim Acta 2012; 734:31-44. [DOI: 10.1016/j.aca.2012.05.018] [Citation(s) in RCA: 365] [Impact Index Per Article: 30.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Revised: 05/04/2012] [Accepted: 05/12/2012] [Indexed: 11/21/2022]
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63
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Farahi RH, Passian A, Tetard L, Thundat T. Critical issues in sensor science to aid food and water safety. ACS NANO 2012; 6:4548-4556. [PMID: 22564109 DOI: 10.1021/nn204999j] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The stability of food and water supplies is widely recognized as a global issue of fundamental importance. Sensor development for food and water safety by nonconventional assays continues to overcome technological challenges. The delicate balance between attaining adequate limits of detection, chemical fingerprinting of the target species, dealing with the complex food matrix, and operating in difficult environments are still the focus of current efforts. While the traditional pursuit of robust recognition methods remains important, emerging engineered nanomaterials and nanotechnology promise better sensor performance but also bring about new challenges. Both advanced receptor-based sensors and emerging non-receptor-based physical sensors are evaluated for their critical challenges toward out-of-laboratory applications.
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Affiliation(s)
- R H Farahi
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6123, USA
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64
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Robinson AM, Harroun SG, Bergman J, Brosseau CL. Portable Electrochemical Surface-Enhanced Raman Spectroscopy System for Routine Spectroelectrochemical Analysis. Anal Chem 2012; 84:1760-4. [DOI: 10.1021/ac2030078] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A. M. Robinson
- Department of Chemistry, Saint Mary’s University, Halifax, Nova Scotia, B3H 3C3 Canada
| | - S. G. Harroun
- Department of Chemistry, Saint Mary’s University, Halifax, Nova Scotia, B3H 3C3 Canada
| | - J. Bergman
- Department of Chemistry, Saint Mary’s University, Halifax, Nova Scotia, B3H 3C3 Canada
| | - C. L. Brosseau
- Department of Chemistry, Saint Mary’s University, Halifax, Nova Scotia, B3H 3C3 Canada
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65
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Zhai WL, Li DW, Qu LL, Fossey JS, Long YT. Multiple depositions of Ag nanoparticles on chemically modified agarose films for surface-enhanced Raman spectroscopy. NANOSCALE 2012; 4:137-142. [PMID: 22064940 DOI: 10.1039/c1nr10956a] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A facile and cost-effective approach for the preparation of a surface-enhanced Raman spectroscopy (SERS) substrate through constructing silver nanoparticle/3-aminopropyltriethoxysilane/agarose films (Ag NPs/APTES/Agar film) on various solid supports is described. The SERS performance of the substrate was systematically investigated, revealing a maximum SERS intensity with four layers of the Ag NP deposition. The enhancement factor of the developed substrate was calculated as 1.5 × 10(7) using rhodamine 6G (R6G) as the probe molecule, and the reproducibility of the SERS signals was established. A high throughput screening platform was designed, manufactured and implemented which utilised the ability to cast agarose to assemble arrays. Quantitative analysis of 4-aminobenzoic acid (4-ABA) and 4-aminothiophenol (4-ATP) was achieved over a ∼0.5 nM-0.1 μM range.
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Affiliation(s)
- Wen-Lei Zhai
- Key Laboratory for Advanced Materials & Department of Chemistry, East China University of Science 4 and Technology, Shanghai 200237, P.R. China
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66
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Abstract
A general overview of the field of single-molecule (SM) surface-enhanced Raman spectroscopy (SERS) as it stands today is provided. After years of debates on the basic aspects of SM-SERS, the technique is emerging as a well-established subfield of spectroscopy and SERS. SM-SERS is allowing the observation of subtle spectroscopic phenomena that were not hitherto accessible. Examples of the latter are natural isotopic substitutions in single molecules, observation of the true homogeneous broadening of Raman peaks, Raman excitation profiles of individual molecules, and SM electrochemistry. With background examples of the contributions produced by our group, properly interleaved with results by other practitioners in the field, we present some of the latest developments and promising new leads in this new field of spectroscopy.
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Affiliation(s)
- Eric C Le Ru
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Chemical and Physical Sciences, Victoria University of Wellington, New Zealand.
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67
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Su S, Wu W, Gao J, Lu J, Fan C. Nanomaterials-based sensors for applications in environmental monitoring. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm33284a] [Citation(s) in RCA: 164] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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68
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Cialla D, März A, Böhme R, Theil F, Weber K, Schmitt M, Popp J. Surface-enhanced Raman spectroscopy (SERS): progress and trends. Anal Bioanal Chem 2011; 403:27-54. [PMID: 22205182 DOI: 10.1007/s00216-011-5631-x] [Citation(s) in RCA: 402] [Impact Index Per Article: 30.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2011] [Revised: 11/10/2011] [Accepted: 12/01/2011] [Indexed: 12/12/2022]
Abstract
Surface-enhanced Raman spectroscopy (SERS) combines molecular fingerprint specificity with potential single-molecule sensitivity. Therefore, the SERS technique is an attractive tool for sensing molecules in trace amounts within the field of chemical and biochemical analytics. Since SERS is an ongoing topic, which can be illustrated by the increased annual number of publications within the last few years, this review reflects the progress and trends in SERS research in approximately the last three years. The main reason why the SERS technique has not been established as a routine analytic technique, despite its high specificity and sensitivity, is due to the low reproducibility of the SERS signal. Thus, this review is dominated by the discussion of the various concepts for generating powerful, reproducible, SERS-active surfaces. Furthermore, the limit of sensitivity in SERS is introduced in the context of single-molecule spectroscopy and the calculation of the 'real' enhancement factor. In order to shed more light onto the underlying molecular processes of SERS, the theoretical description of SERS spectra is also a growing research field and will be summarized here. In addition, the recording of SERS spectra is affected by a number of parameters, such as laser power, integration time, and analyte concentration. To benefit from synergies, SERS is combined with other methods, such as scanning probe microscopy and microfluidics, which illustrates the broad applications of this powerful technique.
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Affiliation(s)
- Dana Cialla
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Jena, Germany
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69
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Petryayeva E, Krull UJ. Localized surface plasmon resonance: nanostructures, bioassays and biosensing--a review. Anal Chim Acta 2011; 706:8-24. [PMID: 21995909 DOI: 10.1016/j.aca.2011.08.020] [Citation(s) in RCA: 497] [Impact Index Per Article: 38.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2011] [Revised: 08/05/2011] [Accepted: 08/09/2011] [Indexed: 10/17/2022]
Abstract
Localized surface plasmon resonance (LSPR) is an optical phenomena generated by light when it interacts with conductive nanoparticles (NPs) that are smaller than the incident wavelength. As in surface plasmon resonance, the electric field of incident light can be deposited to collectively excite electrons of a conduction band, with the result being coherent localized plasmon oscillations with a resonant frequency that strongly depends on the composition, size, geometry, dielectric environment and separation distance of NPs. This review serves to describe the physical theory of LSPR formation at the surface of nanostructures, and the potential for this optical technology to serve as a basis for the development bioassays and biosensing of high sensitivity. The benefits and challenges associated with various experimental designs of nanoparticles and detection systems, as well as creative approaches that have been developed to improve sensitivity and limits of detection are highlighted using examples from the literature.
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Affiliation(s)
- Eleonora Petryayeva
- Department of Chemical and Physical Sciences, University of Toronto Mississauga, Mississauga, Ontario, Canada
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70
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Liu X, Cao L, Song W, Ai K, Lu L. Functionalizing metal nanostructured film with graphene oxide for ultrasensitive detection of aromatic molecules by surface-enhanced Raman spectroscopy. ACS APPLIED MATERIALS & INTERFACES 2011; 3:2944-2952. [PMID: 21728327 DOI: 10.1021/am200737b] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Surface-enhanced Raman spectroscopy (SERS) as a powerful analytical tool has gained extensive attention. Despite of many efforts in the design of SERS substrates, it remains a grand challenge for creating a general substrate that can detect diverse target analytes. Herein, we report our attempt to address this issue by constructing a novel metal-graphene oxide nanostructured film as SERS substrate. Taking advantages of the high affinity of graphene oxide (GO) toward aromatic molecules and the SERS property of nanostructured metal, this structure exhibits great potential for diverse aromatic molecules sensing, which is demonstrated by using crystal violet (CV) with positive charge, amaranth with negative charge, and neutral phosphorus triphenyl (PPh(3)) as model molecules.
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Affiliation(s)
- Xiaojuan Liu
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, P. R. China
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71
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Li D, Qu L, Zhai W, Xue J, Fossey JS, Long Y. Facile on-site detection of substituted aromatic pollutants in water using thin layer chromatography combined with surface-enhanced Raman spectroscopy. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2011; 45:4046-52. [PMID: 21486008 DOI: 10.1021/es104155r] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A novel facile method for on-site detection of substituted aromatic pollutants in water using thin layer chromatography (TLC) combined with surface-enhanced Raman spectroscopy (SERS) was explored. Various substituted aromatics in polluted water were separated by a convenient TLC protocol and then detected using a portable Raman spectrometer with the prepared silver colloids serving as SERS-active substrates. The effects of operating conditions on detection efficacy were evaluated, and the application of TLC-SERS to on-site detection of artificial and real-life samples of aromatics/polluted water was systematically investigated. It was shown that commercially available Si 60-F(254) TLC plates were suitable for separation and displayed low SERS background and good separation efficiency, 2 mM silver colloids, 20 mM NaCl (working as aggregating agent), 40 mW laser power, and 50 s intergration time were appropriate for the detection regime. Furthermore, qualitative and quantitative detection of most of substituted aromatic pollutants was found to be readily accomplished using the developed TLC-SERS technique, which compared well with GC-MS in terms of identification ability and detection accuracy, and a limit of detection (LOD) less than 0.2 ppm (even at ppb level for some analytes) could be achieved under optimal conditions. The results reveal that the presented convenient method could be used for the effective separation and detection of the substituted aromatic pollutants of water on site, thus reducing possible influences of sample transportation and contamination while shortening the overall analysis time for emergency and routine monitoring of the substituted aromatics/polluted water.
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Affiliation(s)
- Dawei Li
- Shanghai Key Laboratory of Functional Materials Chemistry & Department of Chemistry, East China University of Science and Technology, Shanghai, 200237, PR China
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72
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Li D, Li DW, Fossey JS, Long YT. In situ surface-enhanced Raman scattering and X-ray photoelectron spectroscopic investigation of coenzyme Q10on silver electrode. Phys Chem Chem Phys 2011; 13:2259-65. [DOI: 10.1039/c0cp01449d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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73
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Plowman BJ, Bhargava SK, O'Mullane AP. Electrochemical fabrication of metallic nanostructured electrodes for electroanalytical applications. Analyst 2011; 136:5107-19. [DOI: 10.1039/c1an15657h] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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