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Li S, Ling Y, Chen J, Yuan X, Zhang Z. Portable Copper-Based Electrochemical SERS Sensor for Point-of-Care Testing of Paraquat and Diquat by On-Site Electrostatic Preconcentration. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024. [PMID: 39008657 DOI: 10.1021/acs.langmuir.4c01437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/17/2024]
Abstract
With the advent of portable Raman spectrometers, the deployment of surface-enhanced Raman spectroscopy (SERS) in point-of-care testing (POCT) has been initiated. Within any analytical framework employing SERS, the acuity and selectivity inherent to the SERS substrate are of paramount importance. In this article, we utilize in situ electrochemical passivation technology to fabricate CuI passivation film, which serves as a flexible copper-based SERS substrate. Furthermore, portable electrochemical SERS (EC-SERS) sensors were prepared by combining this with laser direct writing technology. The detection signal was amplified using electrostatic preconcentration technology, showcasing impressive sensitivity, selectivity, and stability in pesticide detection. The detected concentrations of paraquat and diquat in tea reached as low as 3.36 and 2.43 μg/kg, respectively. Furthermore, the application of electrostatic preconcentration facilitated selective target molecule aggregation on the SERS sensor, markedly increasing Raman signal strength and enabling single-molecule detection. This research introduces an innovative POCT method for pesticides, promising to advance environmental monitoring's analytical capabilities.
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Affiliation(s)
- Shilin Li
- Lab of Advanced Materials, School of Materials Sciences and Engineering, Tsinghua University, Beijing 100084, PR China
| | - Yunhan Ling
- Lab of Advanced Materials, School of Materials Sciences and Engineering, Tsinghua University, Beijing 100084, PR China
| | - Jianyue Chen
- Institute of New Functional Materials Co., Ltd, Guangxi Institute of Industrial Technology, Nanning 530200, China
| | - Xiaoming Yuan
- School of Science, China University of Geosciences, Beijing 100083, PR China
| | - Zhengjun Zhang
- Lab of Advanced Materials, School of Materials Sciences and Engineering, Tsinghua University, Beijing 100084, PR China
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2
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Brasiliense V, Park JE, Berns EJ, Van Duyne RP, Mrksich M. Surface potential modulation as a tool for mitigating challenges in SERS-based microneedle sensors. Sci Rep 2022; 12:15929. [PMID: 36151248 PMCID: PMC9508330 DOI: 10.1038/s41598-022-19942-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Accepted: 09/06/2022] [Indexed: 11/08/2022] Open
Abstract
Raman spectroscopic-based biosensing strategies are often complicated by low signal and the presence of multiple chemical species. While surface-enhanced Raman spectroscopy (SERS) nanostructured platforms are able to deliver high quality signals by focusing the electromagnetic field into a tight plasmonic hot-spot, it is not a generally applicable strategy as it often depends on the specific adsorption of the analyte of interest onto the SERS platform. This paper describes a strategy to address this challenge by using surface potential as a physical binding agent in the context of microneedle sensors. We show that the potential-dependent adsorption of different chemical species allows scrutinization of the contributions of different chemical species to the final spectrum, and that the ability to cyclically adsorb and desorb molecules from the surface enables efficient application of multivariate analysis methods. We demonstrate how the strategy can be used to mitigate potentially confounding phenomena, such as surface reactions, competitive adsorption and the presence of molecules with similar structures. In addition, this decomposition helps evaluate criteria to maximize the signal of one molecule with respect to others, offering new opportunities to enhance the measurement of analytes in the presence of interferants.
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Affiliation(s)
- Vitor Brasiliense
- Department of Chemistry, Northwestern University, Evanston, IL-60208, USA
- PPSM, ENS Paris-Saclay, CNRS (UMR 5831), Université Paris-Saclay, 91190, Gif-sur-Yvette, France
| | - Ji Eun Park
- Department of Chemistry, Northwestern University, Evanston, IL-60208, USA
| | - Eric J Berns
- Department of Biomedical Engineering, Northwestern University, Evanston, IL-60208, USA
| | - Richard P Van Duyne
- Department of Chemistry, Northwestern University, Evanston, IL-60208, USA
- Department of Biomedical Engineering, Northwestern University, Evanston, IL-60208, USA
| | - Milan Mrksich
- Department of Chemistry, Northwestern University, Evanston, IL-60208, USA.
- Department of Biomedical Engineering, Northwestern University, Evanston, IL-60208, USA.
- Department of Cell and Developmental Biology, Northwestern University, Chicago, IL-60611, USA.
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3
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Electrochemical Profiling of Plants. ELECTROCHEM 2022. [DOI: 10.3390/electrochem3030030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The profiling, or fingerprinting, of distinct varieties of the Plantae kingdom is based on the bioactive ingredients, which are systematically segregated to perform their detailed analysis. The secondary products portray a pivotal role in defining the ecophysiology of distinct plant species. There is a crucial role of the profiling domain in understanding the various features, characteristics, and conditions related to plants. Advancements in variable technologies have contributed to the development of highly specific sensors for the non-invasive detection of molecules. Furthermore, many hyphenated techniques have led to the development of highly specific integrated systems that allow multiplexed detection, such as high-performance liquid chromatography, gas chromatography, etc., which are quite cumbersome and un-economical. In contrast, electrochemical sensors are a promising alternative which are capable of performing the precise recognition of compounds due to efficient signal transduction. However, due to a few bottlenecks in understanding the principles and non-redox features of minimal metabolites, the area has not been explored. This review article provides an insight to the electrochemical basis of plants in comparison with other traditional approaches and with necessary positive and negative outlooks. Studies consisting of the idea of merging the fields are limited; hence, relevant non-phytochemical reports are included for a better comparison of reports to broaden the scope of this work.
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4
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Optical methods for studying local electrochemical reactions with spatial resolution: A critical review. Anal Chim Acta 2019; 1074:1-15. [DOI: 10.1016/j.aca.2019.02.053] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 02/21/2019] [Accepted: 02/22/2019] [Indexed: 11/19/2022]
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5
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Sanger K, Durucan O, Wu K, Thilsted AH, Heiskanen A, Rindzevicius T, Schmidt MS, Zór K, Boisen A. Large-Scale, Lithography-Free Production of Transparent Nanostructured Surface for Dual-Functional Electrochemical and SERS Sensing. ACS Sens 2017; 2:1869-1875. [PMID: 29164868 DOI: 10.1021/acssensors.7b00783] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
In this work, we present a dual-functional sensor that can perform surface-enhanced Raman spectroscopy (SERS) based identification and electrochemical (EC) quantification of analytes in liquid samples. A lithography-free reactive ion etching process was utilized to obtain nanostructures of high aspect ratios distributed homogeneously on a 4 in. fused silica wafer. The sensor was made up of three-electrode array, obtained by subsequent e-beam evaporation of Au on nanostructures in selected areas through a shadow mask. The SERS performance was evaluated through surface-averaged enhancement factor (EF), which was ∼6.2 × 105, and spatial uniformity of EF, which was ∼13% in terms of relative standard deviation. Excellent electrochemical performance and reproducibility were revealed by recording cyclic voltammograms. On nanostructured electrodes, paracetamol (PAR) showed an improved quasi-reversible behavior with decrease in peak potential separation (ΔEp ∼ 90 mV) and higher peak currents (Ipa/Ipc ∼ 1), compared to planar electrodes (ΔEp ∼ 560 mV). The oxidation potential of PAR was also lowered by ∼80 mV on nanostructured electrodes. To illustrate dual-functional sensing, quantitative evaluation of PAR ranging from 30 μM to 3 mM was realized through EC detection, and the presence of PAR was verified by its SERS fingerprint.
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Affiliation(s)
- Kuldeep Sanger
- Department of Micro- and Nanotechnology and †DNRF and Villum
Fonden Center for
Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics,
IDUN, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Onur Durucan
- Department of Micro- and Nanotechnology and †DNRF and Villum
Fonden Center for
Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics,
IDUN, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Kaiyu Wu
- Department of Micro- and Nanotechnology and †DNRF and Villum
Fonden Center for
Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics,
IDUN, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Anil Haraksingh Thilsted
- Department of Micro- and Nanotechnology and †DNRF and Villum
Fonden Center for
Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics,
IDUN, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Arto Heiskanen
- Department of Micro- and Nanotechnology and †DNRF and Villum
Fonden Center for
Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics,
IDUN, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Tomas Rindzevicius
- Department of Micro- and Nanotechnology and †DNRF and Villum
Fonden Center for
Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics,
IDUN, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Michael Stenbæk Schmidt
- Department of Micro- and Nanotechnology and †DNRF and Villum
Fonden Center for
Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics,
IDUN, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Kinga Zór
- Department of Micro- and Nanotechnology and †DNRF and Villum
Fonden Center for
Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics,
IDUN, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Anja Boisen
- Department of Micro- and Nanotechnology and †DNRF and Villum
Fonden Center for
Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics,
IDUN, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
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6
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Li H, Dai H, Zhang Y, Tong W, Gao H, An Q. Surface-Enhanced Raman Spectra Promoted by a Finger Press in an All-Solid-State Flexible Energy Conversion and Storage Film. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201610737] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Haitao Li
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes; National Laboratory of Mineral Materials; School of Materials Science and Technology; China University of Geosciences; Beijing 100083 China
| | - Han Dai
- Yantai Nanshan University; Longkou Shandong Province 265713 China
| | - Yihe Zhang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes; National Laboratory of Mineral Materials; School of Materials Science and Technology; China University of Geosciences; Beijing 100083 China
| | - Wangshu Tong
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes; National Laboratory of Mineral Materials; School of Materials Science and Technology; China University of Geosciences; Beijing 100083 China
| | - Hua Gao
- School of Science; China University of Geosciences; Beijing 100083 P.R. China
| | - Qi An
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes; National Laboratory of Mineral Materials; School of Materials Science and Technology; China University of Geosciences; Beijing 100083 China
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7
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Li H, Dai H, Zhang Y, Tong W, Gao H, An Q. Surface-Enhanced Raman Spectra Promoted by a Finger Press in an All-Solid-State Flexible Energy Conversion and Storage Film. Angew Chem Int Ed Engl 2017; 56:2649-2654. [DOI: 10.1002/anie.201610737] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 12/19/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Haitao Li
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes; National Laboratory of Mineral Materials; School of Materials Science and Technology; China University of Geosciences; Beijing 100083 China
| | - Han Dai
- Yantai Nanshan University; Longkou Shandong Province 265713 China
| | - Yihe Zhang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes; National Laboratory of Mineral Materials; School of Materials Science and Technology; China University of Geosciences; Beijing 100083 China
| | - Wangshu Tong
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes; National Laboratory of Mineral Materials; School of Materials Science and Technology; China University of Geosciences; Beijing 100083 China
| | - Hua Gao
- School of Science; China University of Geosciences; Beijing 100083 P.R. China
| | - Qi An
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes; National Laboratory of Mineral Materials; School of Materials Science and Technology; China University of Geosciences; Beijing 100083 China
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8
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Wilson AJ, Willets KA. Unforeseen distance-dependent SERS spectroelectrochemistry from surface-tethered Nile Blue: the role of molecular orientation. Analyst 2016; 141:5144-51. [DOI: 10.1039/c6an01266c] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The tether length of Nile Blue impacts molecular orientation leading to unique SERS spectroelectrochemistry.
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9
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Kurouski D, Mattei M, Van Duyne RP. Probing Redox Reactions at the Nanoscale with Electrochemical Tip-Enhanced Raman Spectroscopy. NANO LETTERS 2015; 15:7956-62. [PMID: 26580153 DOI: 10.1021/acs.nanolett.5b04177] [Citation(s) in RCA: 115] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
A fundamental understanding of electrochemical processes at the nanoscale is crucial to solving problems in research areas as diverse as electrocatalysis, energy storage, biological electron transfer, and plasmon-driven chemistry. However, there is currently no technique capable of directly providing chemical information about molecules undergoing heterogeneous charge transfer at the nanoscale. Tip-enhanced Raman spectroscopy (TERS) uniquely offers subnanometer spatial resolution and single-molecule sensitivity, making it the ideal tool for studying nanoscale electrochemical processes with high chemical specificity. In this work, we demonstrate the first electrochemical TERS (EC-TERS) study of the nanoscale redox behavior of Nile Blue (NB), and compare these results with conventional cyclic voltammetry (CV). We successfully monitor the disappearance of the 591 cm(-1) band of NB upon reduction and its reversible reappearance upon oxidation during the CV. Interestingly, we observe a negative shift of more than 100 mV in the onset of the potential response of the TERS intensity of the 591 cm(-1) band, compared to the onset of faradaic current in the CV. We hypothesize that perturbation of the electrical double-layer by the TERS tip locally alters the effective potential experienced by NB molecules in the tip-sample junction. However, we demonstrate that the tip has no effect on the local charge transfer kinetics. Additionally, we observe step-like behavior in some TERS voltammograms corresponding to reduction and oxidation of single or few NB molecules. We also show that the coverage of NB is nonuniform across the ITO surface. We conclude with a discussion of methods to overcome the perturbation of the double-layer and general considerations for using TERS to study nanoscale electrochemical processes.
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Affiliation(s)
- Dmitry Kurouski
- Department of Chemistry and ‡Applied Physics Program, Northwestern University , Evanston, Illinois 60208, United States
| | - Michael Mattei
- Department of Chemistry and ‡Applied Physics Program, Northwestern University , Evanston, Illinois 60208, United States
| | - Richard P Van Duyne
- Department of Chemistry and ‡Applied Physics Program, Northwestern University , Evanston, Illinois 60208, United States
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10
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Zong C, Chen CJ, Zhang M, Wu DY, Ren B. Transient Electrochemical Surface-Enhanced Raman Spectroscopy: A Millisecond Time-Resolved Study of an Electrochemical Redox Process. J Am Chem Soc 2015; 137:11768-74. [DOI: 10.1021/jacs.5b07197] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Cheng Zong
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Chan-Juan Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Meng Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - De-Yin Wu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Bin Ren
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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11
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Han Z, Liu H, Wang B, Weng S, Yang L, Liu J. Three-Dimensional Surface-Enhanced Raman Scattering Hotspots in Spherical Colloidal Superstructure for Identification and Detection of Drugs in Human Urine. Anal Chem 2015; 87:4821-8. [DOI: 10.1021/acs.analchem.5b00176] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Zhenzhen Han
- Institute of Intelligent
Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, China
| | - Honglin Liu
- Institute of Intelligent
Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, China
| | - Bin Wang
- Institute of Intelligent
Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, China
| | - Shizhuang Weng
- Institute of Intelligent
Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, China
| | - Liangbao Yang
- Institute of Intelligent
Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, China
| | - Jinhuai Liu
- Institute of Intelligent
Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, China
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12
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Wilson AJ, Willets KA. Visualizing site-specific redox potentials on the surface of plasmonic nanoparticle aggregates with superlocalization SERS microscopy. NANO LETTERS 2014; 14:939-45. [PMID: 24460095 DOI: 10.1021/nl404347a] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
In this Letter, we demonstrate site-specific redox potentials for Nile Blue adsorbed to Ag nanoparticle electrodes using surface-enhanced Raman scattering (SERS) superlocalization microscopy. Nile Blue is electrochemically modulated between its oxidized and reduced form, which can be optically read out through a corresponding gain or loss in SERS intensity. SERS emission centroids are calculated by fitting the diffraction-limited SERS emission to a two-dimensional Gaussian to determine the approximate location of the emitter with 5-10 nm precision. With molecular coverage above the single molecule level, the SERS centroid trajectories shift reversibly with applied potential over multiple reduction and oxidation cycles. A mechanism is proposed to explain the centroid trajectories based on site-specific redox potentials on the nanoparticle electrode surface, where the first molecule reduced is the last to be oxidized, consistent with reversible electrochemical behavior of redox probes adsorbed to electrode surfaces.
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Affiliation(s)
- Andrew J Wilson
- Department of Chemistry, The University of Texas at Austin , Austin, Texas 78712, United States
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13
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Cortés E, Etchegoin PG, Le Ru EC, Fainstein A, Vela ME, Salvarezza RC. Strong Correlation between Molecular Configurations and Charge-Transfer Processes Probed at the Single-Molecule Level by Surface-Enhanced Raman Scattering. J Am Chem Soc 2013; 135:2809-15. [DOI: 10.1021/ja312236y] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Emiliano Cortés
- Instituto de Investigaciones
Fisicoquímicas Teóricas y Aplicadas (INIFTA), Universidad Nacional de La Plata-CONICET, Sucursal
4 Casilla de Correo 16 (1900), La Plata, Argentina
| | - Pablo G. Etchegoin
- The MacDiarmid Institute for
Advanced Materials and Nanotechnology, School of Chemical and Physical
Sciences, Victoria University of Wellington, PO Box 600, Wellington, New Zealand
| | - Eric C. Le Ru
- The MacDiarmid Institute for
Advanced Materials and Nanotechnology, School of Chemical and Physical
Sciences, Victoria University of Wellington, PO Box 600, Wellington, New Zealand
| | - Alejandro Fainstein
- Centro Atómico Bariloche
and Instituto Balseiro, Comisión Nacional de Energía Atómica and Universidad Nacional de Cuyo, (8400)
San Carlos de Bariloche, Río Negro, Argentina
| | - María E. Vela
- Instituto de Investigaciones
Fisicoquímicas Teóricas y Aplicadas (INIFTA), Universidad Nacional de La Plata-CONICET, Sucursal
4 Casilla de Correo 16 (1900), La Plata, Argentina
| | - Roberto C. Salvarezza
- Instituto de Investigaciones
Fisicoquímicas Teóricas y Aplicadas (INIFTA), Universidad Nacional de La Plata-CONICET, Sucursal
4 Casilla de Correo 16 (1900), La Plata, Argentina
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14
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Willets KA. Super-resolution imaging of interactions between molecules and plasmonic nanostructures. Phys Chem Chem Phys 2013; 15:5345-54. [DOI: 10.1039/c3cp43882a] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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15
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Hill CM, Clayton DA, Pan S. Combined optical and electrochemical methods for studying electrochemistry at the single molecule and single particle level: recent progress and perspectives. Phys Chem Chem Phys 2013; 15:20797-807. [DOI: 10.1039/c3cp52756e] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Willets KA, Stranahan SM, Weber ML. Shedding Light on Surface-Enhanced Raman Scattering Hot Spots through Single-Molecule Super-Resolution Imaging. J Phys Chem Lett 2012; 3:1286-1294. [PMID: 26286772 DOI: 10.1021/jz300110x] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Super-resolution imaging has recently been utilized to develop a better understanding of the properties of surface-enhanced Raman scattering (SERS) hot spots. SERS hot spots are much smaller than the diffraction limit of light, and therefore, obtaining a clear picture of the enhanced electromagnetic (EM) fields comprising these hot spots is a challenging task. In this Perspective, we discuss recent work applying super-resolution imaging to single-molecule SERS (SM-SERS) of rhodamine 6G (R6G) adsorbed to randomly assembled silver colloidal aggregates, allowing the shape, size, and local enhancement of the hot spots to be imaged with <5 nm resolution. The results are compared with studies applying super-resolution imaging to surface-enhanced fluorescence (SEF) of analytes diffusing into silver nanoparticle hot spots. Both studies show a strong correlation between emission intensity and position, allowing the EM field enhancements of SERS hot spots to be mapped with sub-5 nm resolution.
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Affiliation(s)
- Katherine A Willets
- Department of Chemistry and Biochemistry, The University of Texas at Austin, 1 University Station A5300, Austin, Texas 78712, United States
| | - Sarah M Stranahan
- Department of Chemistry and Biochemistry, The University of Texas at Austin, 1 University Station A5300, Austin, Texas 78712, United States
| | - Maggie L Weber
- Department of Chemistry and Biochemistry, The University of Texas at Austin, 1 University Station A5300, Austin, Texas 78712, United States
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17
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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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18
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Surface-enhanced Raman scattering-active silver nanostructures with two domains. Anal Chim Acta 2012; 709:91-7. [DOI: 10.1016/j.aca.2011.10.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2011] [Accepted: 10/09/2011] [Indexed: 11/20/2022]
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19
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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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Ma W, Li DW, Sutherland TC, Li Y, Long YT, Chen HY. Reversible redox of NADH and NAD+ at a hybrid lipid bilayer membrane using ubiquinone. J Am Chem Soc 2011; 133:12366-9. [PMID: 21774485 DOI: 10.1021/ja204014s] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Here, we report the reversible interconversion between NADH and NAD(+) at a low overpotential, which is in part mediated by ubiquinone embedded in a biomimetic membrane to mimic the initial stages of respiration. This system can be used as a platform to examine biologically relevant electroactive molecules embedded in a natural membrane environment and provide new insights into the mechanism of biological redox cycling.
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Affiliation(s)
- Wei Ma
- Shanghai Key Laboratory of Functional Materials Chemistry and Department of Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, PR China
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Affiliation(s)
- Jerome Workman
- Unity Scientific LLC, 117 Old State Rd., Brookfield, Connecticut 06804, and United States National University, 11255 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Barry Lavine
- Department of Chemistry, Oklahoma State University, Stillwater, Oklahoma 74078, United States
| | - Ray Chrisman
- Atodyne Technologies, L.L.C., 4699 Pontiac Trail, Ann Arbor, Michigan 48105, United States
| | - Mel Koch
- Center for Process Analytical Chemistry (CPAC), University of Washington, Seattle, Washington 98195-1700, United States
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