1
|
SECM investigation on pH changes in cellular environment induced by caffeine. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2023.142015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
|
2
|
Al-Jeda M, Mena-Morcillo E, Chen A. Micro-Sized pH Sensors Based on Scanning Electrochemical Probe Microscopy. MICROMACHINES 2022; 13:2143. [PMID: 36557442 PMCID: PMC9785626 DOI: 10.3390/mi13122143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 11/29/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
Monitoring pH changes at the micro/nano scale is essential to gain a fundamental understanding of surface processes. Detection of local pH changes at the electrode/electrolyte interface can be achieved through the use of micro-/nano-sized pH sensors. When combined with scanning electrochemical microscopy (SECM), these sensors can provide measurements with high spatial resolution. This article reviews the state-of-the-art design and fabrication of micro-/nano-sized pH sensors, as well as their applications based on SECM. Considerations for selecting sensing probes for use in biological studies, corrosion science, in energy applications, and for environmental research are examined. Different types of pH sensitive probes are summarized and compared. Finally, future trends and emerging applications of micro-/nano-sized pH sensors are discussed.
Collapse
Affiliation(s)
| | | | - Aicheng Chen
- Correspondence: ; Tel.: +1-519-824-4120 (ext. 54764)
| |
Collapse
|
3
|
Uses of Scanning Electrochemical Microscopy (SECM) for the Characterization with Spatial and Chemical Resolution of Thin Surface Layers and Coating Systems Applied on Metals: A Review. COATINGS 2022. [DOI: 10.3390/coatings12050637] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
Scanning Electrochemical Microscopy (SECM) is increasingly used in the study and characterization of thin surface films as well as organic and inorganic coatings applied on metals for the collection of spatially- and chemically-resolved information on the localized reactions related to material degradation processes. The movement of a microelectrode (ME) in close proximity to the interface under study allows the application of various experimental procedures that can be classified into amperometric and potentiometric operations depending on either sensing faradaic currents or concentration distributions resulting from the corrosion process. Quantitative analysis can be performed using the ME signal, thus revealing different sample properties and/or the influence of the environment and experimental variables that can be observed on different length scales. In this way, identification of the earlier stages for localized corrosion initiation, the adsorption and formation of inhibitor layers, monitoring of water and specific ions uptake by intact polymeric coatings applied on metals for corrosion protection as well as lixiviation, and detection of coating swelling—which constitutes the earlier stages of blistering—have been successfully achieved. Unfortunately, despite these successful applications of SECM for the characterization of surface layers and coating systems applied on metallic materials, we often find in the scientific literature insufficient or even inadequate description of experimental conditions related to the reliability and reproducibility of SECM data for validation. This review focuses specifically on these features as a continuation of a previous review describing the applications of SECM in this field.
Collapse
|
4
|
Monteiro MCO, Liu X, Hagedoorn BJL, Snabilié DD, Koper MTM. Interfacial pH Measurements Using a Rotating Ring‐Disc Electrode with a Voltammetric pH Sensor. ChemElectroChem 2021. [DOI: 10.1002/celc.202101223] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Mariana C. O. Monteiro
- Leiden Institute of Chemistry Leiden University Einsteinweg 55 2333CC Leiden The Netherlands
| | - Xuan Liu
- Leiden Institute of Chemistry Leiden University Einsteinweg 55 2333CC Leiden The Netherlands
| | | | - Demi D. Snabilié
- Leiden Institute of Chemistry Leiden University Einsteinweg 55 2333CC Leiden The Netherlands
| | - Marc T. M. Koper
- Leiden Institute of Chemistry Leiden University Einsteinweg 55 2333CC Leiden The Netherlands
| |
Collapse
|
5
|
Zhu Z, Zhang Q, Liu P, Zhang J, Cao F. Quasi-simultaneous electrochemical/chemical imaging of local Fe2+ and pH distributions on 316 L stainless steel surface. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114107] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
6
|
Review of Electrochemical DNA Biosensors for Detecting Food Borne Pathogens. SENSORS 2019; 19:s19224916. [PMID: 31718098 PMCID: PMC6891683 DOI: 10.3390/s19224916] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 11/07/2019] [Accepted: 11/08/2019] [Indexed: 12/13/2022]
Abstract
The vital importance of rapid and accurate detection of food borne pathogens has driven the development of biosensor to prevent food borne illness outbreaks. Electrochemical DNA biosensors offer such merits as rapid response, high sensitivity, low cost, and ease of use. This review covers the following three aspects: food borne pathogens and conventional detection methods, the design and fabrication of electrochemical DNA biosensors and several techniques for improving sensitivity of biosensors. We highlight the main bioreceptors and immobilizing methods on sensing interface, electrochemical techniques, electrochemical indicators, nanotechnology, and nucleic acid-based amplification. Finally, in view of the existing shortcomings of electrochemical DNA biosensors in the field of food borne pathogen detection, we also predict and prospect future research focuses from the following five aspects: specific bioreceptors (improving specificity), nanomaterials (enhancing sensitivity), microfluidic chip technology (realizing automate operation), paper-based biosensors (reducing detection cost), and smartphones or other mobile devices (simplifying signal reading devices).
Collapse
|
7
|
Molecular mechanisms associated with acidification and alkalization along the larval midgut of Musca domestica. Comp Biochem Physiol A Mol Integr Physiol 2019; 237:110535. [DOI: 10.1016/j.cbpa.2019.110535] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 08/01/2019] [Accepted: 08/01/2019] [Indexed: 01/07/2023]
|
8
|
Botz A, Clausmeyer J, Öhl D, Tarnev T, Franzen D, Turek T, Schuhmann W. Die lokalen Aktivitäten von Hydroxidionen und Wasser bestimmen die Funktionsweise von auf Silber basierenden Sauerstoffverzehrkathoden. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201807798] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Alexander Botz
- Analytical Chemistry -, Center for Electrochemical Sciences (CES); Ruhr-Universität Bochum; Universitätsstraße 150 44780 Bochum Deutschland
| | - Jan Clausmeyer
- Analytical Chemistry -, Center for Electrochemical Sciences (CES); Ruhr-Universität Bochum; Universitätsstraße 150 44780 Bochum Deutschland
| | - Denis Öhl
- Analytical Chemistry -, Center for Electrochemical Sciences (CES); Ruhr-Universität Bochum; Universitätsstraße 150 44780 Bochum Deutschland
| | - Tsvetan Tarnev
- Analytical Chemistry -, Center for Electrochemical Sciences (CES); Ruhr-Universität Bochum; Universitätsstraße 150 44780 Bochum Deutschland
| | - David Franzen
- Institut für Chemische und Elektrochemische Verfahrenstechnik; Technische Universität Clausthal; Leibnizstraße 17 38678 Clausthal-Zellerfeld Deutschland
| | - Thomas Turek
- Institut für Chemische und Elektrochemische Verfahrenstechnik; Technische Universität Clausthal; Leibnizstraße 17 38678 Clausthal-Zellerfeld Deutschland
| | - Wolfgang Schuhmann
- Analytical Chemistry -, Center for Electrochemical Sciences (CES); Ruhr-Universität Bochum; Universitätsstraße 150 44780 Bochum Deutschland
| |
Collapse
|
9
|
Botz A, Clausmeyer J, Öhl D, Tarnev T, Franzen D, Turek T, Schuhmann W. Local Activities of Hydroxide and Water Determine the Operation of Silver-Based Oxygen Depolarized Cathodes. Angew Chem Int Ed Engl 2018; 57:12285-12289. [PMID: 30073732 DOI: 10.1002/anie.201807798] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2018] [Indexed: 11/09/2022]
Abstract
Local ion activity changes in close proximity to the surface of an oxygen depolarized cathode (ODC) were measured by scanning electrochemical microscopy (SECM). While the operating ODC produces OH- ions and consumes O2 and H2 O through the electrocatalytic oxygen reduction reaction (ORR), local changes in the activity of OH- ions and H2 O are detected by means of a positioned Pt microelectrode serving as an SECM tip. Sensing at the Pt tip is based on the pH-dependent reduction of PtO and obviates the need for prior electrode modification steps. It can be used to evaluate the coordination numbers of OH- ions and H2 O, and the method was exploited as a novel approach of catalyst activity assessment. We show that the electrochemical reaction on highly active catalysts can have a drastic influence on the reaction environment.
Collapse
Affiliation(s)
- Alexander Botz
- Analytical Chemistry-Center for Electrochemical Sciences (CES), Ruhr-Universität Bochum, Universitätsstr. 150, 44780, Bochum, Germany
| | - Jan Clausmeyer
- Analytical Chemistry-Center for Electrochemical Sciences (CES), Ruhr-Universität Bochum, Universitätsstr. 150, 44780, Bochum, Germany
| | - Denis Öhl
- Analytical Chemistry-Center for Electrochemical Sciences (CES), Ruhr-Universität Bochum, Universitätsstr. 150, 44780, Bochum, Germany
| | - Tsvetan Tarnev
- Analytical Chemistry-Center for Electrochemical Sciences (CES), Ruhr-Universität Bochum, Universitätsstr. 150, 44780, Bochum, Germany
| | - David Franzen
- Institute of Chemical and Electrochemical Process Engineering, Clausthal University of Technology, Leibnizstr. 17, 38678, Clausthal-Zellerfeld, Germany
| | - Thomas Turek
- Institute of Chemical and Electrochemical Process Engineering, Clausthal University of Technology, Leibnizstr. 17, 38678, Clausthal-Zellerfeld, Germany
| | - Wolfgang Schuhmann
- Analytical Chemistry-Center for Electrochemical Sciences (CES), Ruhr-Universität Bochum, Universitätsstr. 150, 44780, Bochum, Germany
| |
Collapse
|
10
|
Zhu Z, Ye Z, Zhang Q, Zhang J, Cao F. Novel dual Pt-Pt/IrO ultramicroelectrode for pH imaging using SECM in both potentiometric and amperometric modes. Electrochem commun 2018. [DOI: 10.1016/j.elecom.2018.01.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
|
11
|
Critelli RA, Sumodjo PT, Bertotti M, Torresi RM. Influence of glycine on Co electrodeposition: IR spectroscopy and near-surface pH investigations. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2017.12.032] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
12
|
Lima AS, Prieto KR, Santos CS, Paula Valerio H, Garcia-Ochoa EY, Huerta-Robles A, Beltran-Garcia MJ, Di Mascio P, Bertotti M. In-vivo electrochemical monitoring of H 2O 2 production induced by root-inoculated endophytic bacteria in Agave tequilana leaves. Biosens Bioelectron 2017; 99:108-114. [PMID: 28746900 DOI: 10.1016/j.bios.2017.07.039] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Revised: 07/12/2017] [Accepted: 07/14/2017] [Indexed: 01/15/2023]
Abstract
A dual-function platinum disc microelectrode sensor was used for in-situ monitoring of H2O2 produced in A. tequilana leaves after inoculation of their endophytic bacteria (Enterobacter cloacae). Voltammetric experiments were carried out from 0.0 to -1.0V, a potential range where H2O2 is electrochemically reduced. A needle was used to create a small cavity in the upper epidermis of A. tequilana leaves, where the fabricated electrochemical sensor was inserted by using a manual three-dimensional micropositioner. Control experiments were performed with untreated plants and the obtained electrochemical results clearly proved the formation of H2O2 in the leaves of plants 3h after the E. cloacae inoculation, according to a mechanism involving endogenous signaling pathways. In order to compare the sensitivity of the microelectrode sensor, the presence of H2O2 was detected in the root hairs by 3,3-diaminobenzidine (DAB) stain 72h after bacterial inoculation. In-situ pH measurements were also carried out with a gold disc microelectrode modified with a film of iridium oxide and lower pH values were found in A. tequilana leaves treated with bacteria, which may indicate the plant produces acidic substances by biosynthesis of secondary metabolites. This microsensor could be an advantageous tool for further studies on the understanding of the mechanism of H2O2 production during the plant-endophyte interaction.
Collapse
Affiliation(s)
- Alex S Lima
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748, 05508-000 São Paulo, SP, Brazil.
| | - Kátia R Prieto
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748, 05508-000 São Paulo, SP, Brazil
| | - Carla S Santos
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748, 05508-000 São Paulo, SP, Brazil
| | - Hellen Paula Valerio
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748, 05508-000 São Paulo, SP, Brazil
| | - Evelyn Y Garcia-Ochoa
- Department of Chemistry ICET, Universidad Autonoma de Guadalajara, Patria 1201, Lomas del Valle, Zapopan, Jalisco, Mexico
| | - Aurora Huerta-Robles
- Institute of Engineering, Universidad Autonoma de Baja California, Blvd. B. Juarez y Calle de la Normal s/n, Mexicali, BC, Mexico
| | - Miguel J Beltran-Garcia
- Department of Chemistry ICET, Universidad Autonoma de Guadalajara, Patria 1201, Lomas del Valle, Zapopan, Jalisco, Mexico
| | - Paolo Di Mascio
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748, 05508-000 São Paulo, SP, Brazil
| | - Mauro Bertotti
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748, 05508-000 São Paulo, SP, Brazil.
| |
Collapse
|
13
|
Rai RK, Tyagi D, Singh SK. Room-Temperature Catalytic Reduction of Aqueous Nitrate to Ammonia with Ni Nanoparticles Immobilized on an Fe3
O4
@n-SiO2
@h-SiO2
-NH2
Support. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700082] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Rohit Kumar Rai
- Discipline of Chemistry; Indian Institute of Technology Indore; 453552 Simrol, Indore India
| | - Deepika Tyagi
- Discipline of Chemistry; Indian Institute of Technology Indore; 453552 Simrol, Indore India
| | - Sanjay Kumar Singh
- Discipline of Chemistry; Indian Institute of Technology Indore; 453552 Simrol, Indore India
- Discipline of Metallurgy Engineering and Materials Science; Indian Institute of Technology Indore; 453552 Simrol, Indore India
| |
Collapse
|