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Merlen A, Berthomieu D, Edely M, Rerat M. Raman spectra and DFT calculations of thiophenol molecules adsorbed on a gold surface. Phys Chem Chem Phys 2022; 24:29505-29511. [PMID: 36448448 DOI: 10.1039/d2cp04157j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
We report the calculation of Raman modes of thiophenol molecules adsorbed on a real gold surface. The calculated Raman spectra strongly depend on the absorption configuration of the molecule on the metallic surface, a feature that should be carefully taken into account in the interpretation of the surface enhanced Raman spectra (SERS). The calculated Raman spectra are compared with experimental SERS measurements, the best accordance being obtained for a tilted configuration of the absorbed molecule. The present study supports the necessary combination of computational approaches with SERS measurements to predict the type of molecular adsorption configurations on metallic surfaces.
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Affiliation(s)
- A Merlen
- IM2NP, Univ Toulon and Aix-Marseille Univ, CNRS, UMR 7334, site de Toulon, France.
| | - D Berthomieu
- ICGM, Université Montpellier, CNRS, ENSCM, Montpellier, France
| | - M Edely
- Institut des Molécules et Matériaux du Mans, Le Mans Université, CNRS, UMR 6283, France
| | - M Rerat
- Université de Pau et des pays de l'Adour, CNRS, IPREM UMR 5254, E2S UPPA, Pau, France
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2
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Differential surface partitioning for an ultrasensitive solid-state SERS sensor and its application to food colorant analysis. Food Chem 2022; 383:132415. [PMID: 35180601 DOI: 10.1016/j.foodchem.2022.132415] [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: 09/18/2021] [Revised: 01/22/2022] [Accepted: 02/07/2022] [Indexed: 02/03/2023]
Abstract
Solid-state SERS sensors are desirable point-of-care tools due to their portability. However, the level of SERS sensitivity achieved in liquid phase is rarely duplicated in the solid phase. We report herein the fabrication of a SERS sensor using alumina beads as the solid support and demonstrate its high SERS sensitivity with the model analyte 4-aminophenyl disulfide (4-APDS). The key to sensitivity is a hydrophilic-hydrophobic surface gradient constructed by sequentially coating with the surfactant cetyltrimethylammonium bromide and fluorous 1H,1H,2H,2H-perfluorooctyltriethoxysilane. The surface gradient, together with chloride etching, allows the detection of 4-APDS at the low concentration of 10-15 M. The practicality of the sensor beads is evidenced by successfully tracking the SERS fingerprints of five food colorant standards in the SERS spectra of a popular candy product. These SERS sensor beads are easy to prepare, convenient to use, and highly responsive as a SERS platform for the analysis of colorants.
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Kumar N, Thomas S, Rao R, Maiti N, Kshirsagar RJ. Plasmon-Induced Dimerization of Thiazolidine-2,4-dione on Silver Nanoparticles: Revealed by Surface-Enhanced Raman Scattering Study. J Phys Chem A 2019; 123:9770-9780. [PMID: 31633920 DOI: 10.1021/acs.jpca.9b07367] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Surface-enhanced Raman scattering (SERS) study carried on thiazolidine-2,4-dione (TZD), a pharmacologically active heterocyclic compound, points to the presence of TZD dimer formed by plasmon-induced dimerization reaction of TZD on the surface of silver nanoparticles (Ag NP) at TZD concentrations of 10-3 M and above. The evidence for the presence of dimer was obtained from the appearance of a prominent band at 1566 cm-1 corresponding to the ν(C═C) band (a characteristic vibrational band observed for the Knoevenagel condensation reaction products) which is absent in the normal Raman scattering (NRS) spectra of TZD solid/solution. The observed spectrum compares well with the calculated spectrum of dimer obtained using density functional theory (DFT) calculations. The dimerization reaction is plausibly induced by the transfer of hot electrons generated by the nonradiative plasmon decay of Ag NP, and the proposed reaction mechanism is discussed. However, at lower concentrations (10-4-10-6 M), the characteristic dimer peak (1566 cm-1) is absent and the SERS spectra resemble more the NRS spectrum of TZD with a few changes. The spectral analysis supported by DFT calculations showed that TZD molecules undergo deprotonation and get adsorbed on the Ag NP surface as enolate forms. The proximity of TZD molecules on the surface of Ag NP is a necessary factor for the dimerization to occur. At lower concentrations, most molecules lie apart and reactions between molecules become less feasible, and they remain as monomers on the surface, while at higher concentrations the molecules are closer to each other on the Ag NP surface favoring the dimerization reaction to take place, leading to the formation of the dimer.
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Affiliation(s)
- Naveen Kumar
- Homi Bhabha National Institute , Anushaktinagar, Mumbai , 400 094 , India
| | | | - Rekha Rao
- Homi Bhabha National Institute , Anushaktinagar, Mumbai , 400 094 , India
| | - N Maiti
- Homi Bhabha National Institute , Anushaktinagar, Mumbai , 400 094 , India
| | - R J Kshirsagar
- Homi Bhabha National Institute , Anushaktinagar, Mumbai , 400 094 , India
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4
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Wu S, Liu Y, Ma C, Wang J, Zhang Y, Song P, Xia L. Effect of Intermolecular Distance on Surface-Plasmon-Assisted Catalysis. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:7240-7247. [PMID: 29864285 DOI: 10.1021/acs.langmuir.8b00700] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
4-Aminothiophenol (PATP) and 4-aminophenyl disulfide (APDS) in contact with silver will form H2N-C6H4-S-Ag (PATP-Ag), and under the conditions of surface-enhanced Raman spectroscopy (SERS), a coupling reaction will generate 4,4-dimercaptoazobenzene (DMAB). DMAB is strongly Raman-active, showing strong peaks at ν ≈ 1140, 1390, and 1432 cm-1, and is widely used in surface-plasmon-assisted catalysis. Using APDS, PATP, p-nitrothiophenol (PNTP), and p-nitrodiphenyl disulfide (NPDS) as probe molecules, Raman spectroscopy and imaging techniques have been used to study the effect of intermolecular distance on surface-plasmon-assisted catalysis. Theoretically, PATP-Ag formed from APDS will be bound at proximal Ag atoms on the Ag surface due to S-S bond cleavage. The results show that APDS is more prone to surface-plasmon-assisted catalytic coupling due to the smaller distance between surface PATP-Ag moieties than those derived from PATP. Therefore, APDS has a higher reaction efficiency, better Raman activity, and better Raman imaging than does PATP. Analogous experiments with PNTP and NPDS gave similar results. Thus, this technique has great application prospects in the fields of surface chemistry and materials chemistry.
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Deckert-Gaudig T, Taguchi A, Kawata S, Deckert V. Tip-enhanced Raman spectroscopy - from early developments to recent advances. Chem Soc Rev 2018. [PMID: 28640306 DOI: 10.1039/c7cs00209b] [Citation(s) in RCA: 103] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
An analytical technique operating at the nanoscale must be flexible regarding variable experimental conditions while ideally also being highly specific, extremely sensitive, and spatially confined. In this respect, tip-enhanced Raman scattering (TERS) has been demonstrated to be ideally suited to, e.g., elucidating chemical reaction mechanisms, determining the distribution of components and identifying and localizing specific molecular structures at the nanometre scale. TERS combines the specificity of Raman spectroscopy with the high spatial resolution of scanning probe microscopies by utilizing plasmonic nanostructures to confine the incident electromagnetic field and increase it by many orders of magnitude. Consequently, molecular structure information in the optical near field that is inaccessible to other optical microscopy methods can be obtained. In this general review, the development of this still-young technique, from early experiments to recent achievements concerning inorganic, organic, and biological materials, is addressed. Accordingly, the technical developments necessary for stable and reliable AFM- and STM-based TERS experiments, together with the specific properties of the instruments under different conditions, are reviewed. The review also highlights selected experiments illustrating the capabilities of this emerging technique, the number of users of which has steadily increased since its inception in 2000. Finally, an assessment of the frontiers and new concepts of TERS, which aim towards rendering it a general and widely applicable technique that combines the highest possible lateral resolution and extreme sensitivity, is provided.
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Dab C, Awada C, Merlen A, Ruediger A. Near-field chemical mapping of gold nanostructures using a functionalized scanning probe. Phys Chem Chem Phys 2018; 19:31063-31071. [PMID: 29159349 DOI: 10.1039/c7cp06004a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We report on photochemical and photophysical properties produced by Surface Plasmon Resonance (SPR) on metallic nanograins by means of high resolution Functionalized Tip-Enhanced Raman Spectroscopy (F-TERS). This technique relies on a sharp gold tip functionalized with Raman-active molecules to be scanned relatively to plasmonic hot-spots on a surface. We describe the local variation of plasmon-induced Raman enhancement on the surface of nanostructures that also affects the photochemistry while the quantitative interpretation of peak intensities requires the consideration of surface topography near the tip apex. Our F-TERS maps show Raman modes of hot electron reduction of 4-nitrothiophenol (4-NTP) molecules on the tip and indicate at least partial photochemical dimerization. An apparent photo-induced reversibility of this dimerization can be conservatively explained by a local topography feature that we simulate in a finite element environment. Our experimental results reveal a spatial resolution of approximately 10 nm, corresponding to a few hundred 4-NTP molecules exposed to the near-field.
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Affiliation(s)
- C Dab
- Nanophotonics-Nanoelectronics, Institut National de la Recherche Scientifique INRS-EMT, 1650 Boul. Lionel-Boulet, Varennes J3X 1S2, Canada.
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Lin W, Cao Y, Wang P, Sun M. Unified Treatment for Plasmon-Exciton Co-driven Reduction and Oxidation Reactions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:12102-12107. [PMID: 29048897 DOI: 10.1021/acs.langmuir.7b03144] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Revealing the nature of plasmon-exciton co-driven surface catalytic reactions is important and urgent for developing potential applications in energy and environmental science. In this work, we propose a mechanism for plasmon-exciton co-driven surface catalytic reactions based on our experimental results. We provide a method for a unified treatment for reduction and oxidation reactions, which not only strongly supports our proposed mechanism but also promotes a deeper understanding of plasmon-exciton co-driven surface catalytic reactions.
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Affiliation(s)
- Weihua Lin
- Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, Center for Green Innovation, School of Mathematics and Physics, University of Science and Technology Beijing , Beijing, 100083, People's Republic of China
| | - Yaqian Cao
- The Beijing Key Laboratory for Nano-Photonics and Nano-Structure, Center for Condensed Matter Physics, Department of Physics, Capital Normal University , Beijing 100048, People's Republic of China
| | - Peijie Wang
- The Beijing Key Laboratory for Nano-Photonics and Nano-Structure, Center for Condensed Matter Physics, Department of Physics, Capital Normal University , Beijing 100048, People's Republic of China
| | - Mengtao Sun
- Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, Center for Green Innovation, School of Mathematics and Physics, University of Science and Technology Beijing , Beijing, 100083, People's Republic of China
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8
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Wang J, Lin W, Xu X, Ma F, Sun M. Plasmon-Exciton Coupling Interaction for Surface Catalytic Reactions. CHEM REC 2017; 18:481-490. [DOI: 10.1002/tcr.201700053] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2017] [Accepted: 10/02/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Jingang Wang
- College of Science; Liaoning Shihua University; Fushun 113001 China
- Departments of Physics; Liaoning University; Shenyang 110036 China
| | - Weihua Lin
- Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, Center for Green Innovation, School of Mathematics and Physics; University of Science and Technology Beijing; Beijing 100083 China
| | - Xuefeng Xu
- Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, Center for Green Innovation, School of Mathematics and Physics; University of Science and Technology Beijing; Beijing 100083 China
| | - Fengcai Ma
- Departments of Physics; Liaoning University; Shenyang 110036 China
| | - Mengtao Sun
- Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, Center for Green Innovation, School of Mathematics and Physics; University of Science and Technology Beijing; Beijing 100083 China
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Ren X, Cao E, Lin W, Song Y, Liang W, Wang J. Recent advances in surface plasmon-driven catalytic reactions. RSC Adv 2017. [DOI: 10.1039/c7ra05346k] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Surface plasmons, the free electrons' collective oscillations, have been used in the signal detection and analysis of target molecules, where the local surface plasmon resonance (LSPR) can produce a huge EM field, thus enhancing the SERS signal.
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Affiliation(s)
- Xin Ren
- School of Physics and Electronics
- Shandong Normal University
- Jinan
- China
- Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science
| | - En Cao
- School of Physics and Electronics
- Shandong Normal University
- Jinan
- China
- Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science
| | - Weihua Lin
- Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science
- School of Mathematics and Physics
- University of Science and Technology Beijing
- Beijing
- P. R. China
| | - Yuzhi Song
- School of Physics and Electronics
- Shandong Normal University
- Jinan
- China
| | - Wejie Liang
- Beijing National Laboratory for Condensed Matter Physics
- Institute of Physics
- Chinese Academy of Sciences
- Beijing
- P. R. China
| | - Jingang Wang
- Department of Physics
- Liaoning University
- Shenyang 110036
- P. R. China
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10
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Abstract
Tip-enhanced Raman spectroscopy (TERS), a combination of Raman spectroscopy and apertureless near-field scanning optical microscopy using a metallic tip which resonates with the local mode of the surface plasmon, can provide a high-sensitive and high-spatial-resolution optical analytical approach. The basic principle of TERS, common experimental setups, various SPM technologies, and excitation/collection configurations are introduced as well as recent research progress with respect to TERS.
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Affiliation(s)
- Zhenglong Zhang
- School of Mathematics and Physics, University of Science and Technology Beijing , Beijing, 100083, People's Republic of China.,School of Physics and Information Technology, Shaanxi Normal University , Xi'an, 710062, People's Republic of China.,Leibniz Institute of Photonic Technology , Albert-Einstein-Strasse 9, 07745 Jena, Germany
| | - Shaoxiang Sheng
- Beijing National Laboratory for Condensed Matter Physics, Beijing Key Laboratory for Nanomaterials and Nanodevices, Institute of Physics, Chinese Academy of Sciences , Beijing, 100190, People's Republic of China
| | - Rongming Wang
- School of Mathematics and Physics, University of Science and Technology Beijing , Beijing, 100083, People's Republic of China
| | - Mengtao Sun
- School of Mathematics and Physics, University of Science and Technology Beijing , Beijing, 100083, People's Republic of China.,Beijing National Laboratory for Condensed Matter Physics, Beijing Key Laboratory for Nanomaterials and Nanodevices, Institute of Physics, Chinese Academy of Sciences , Beijing, 100190, People's Republic of China
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Zhang Z, Xu P, Yang X, Liang W, Sun M. Surface plasmon-driven photocatalysis in ambient, aqueous and high-vacuum monitored by SERS and TERS. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2016. [DOI: 10.1016/j.jphotochemrev.2016.04.001] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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12
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Chu J, Miao P, Han X, Du Y, Wang X, Song B, Xu P. Ultrafast Surface-Plasmon-Induced Photodimerization ofp-Aminothiophenol on Ag/TiO2Nanoarrays. ChemCatChem 2016. [DOI: 10.1002/cctc.201600172] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jiayu Chu
- School of Chemistry and Chemical Engineering; Harbin Institute of Technology; Harbin 150001 P.R. China
| | - Peng Miao
- School of Chemistry and Chemical Engineering; Harbin Institute of Technology; Harbin 150001 P.R. China
| | - Xijiang Han
- School of Chemistry and Chemical Engineering; Harbin Institute of Technology; Harbin 150001 P.R. China
| | - Yunchen Du
- School of Chemistry and Chemical Engineering; Harbin Institute of Technology; Harbin 150001 P.R. China
| | - Xianjie Wang
- Department of Physics; Harbin Institute of Technology; Harbin 150001 P.R. China
| | - Bo Song
- Academy of Fundamental and Interdisciplinary Sciences; Harbin Institute of Technology; Harbin 150001 P.R. China
| | - Ping Xu
- School of Chemistry and Chemical Engineering; Harbin Institute of Technology; Harbin 150001 P.R. China
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