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Tapan NA, Günay ME, Yıldırım N. Application of Machine Learning for the Determination of Damaged Starch Ratio as an Alternative to Medcalf and Gilles Principle. FOOD ANAL METHOD 2022. [DOI: 10.1007/s12161-022-02442-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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2
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Simulating Cu electrodeposition in high aspect ratio features: Effect of control mode and uncompensated resistance in S-NDR systems. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.137925] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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3
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Silva-Dias L, Lopez-Castillo A. Turing patterns modulation by chemical gradient in isothermal and non-isothermal conditions. Phys Chem Chem Phys 2020; 22:7507-7515. [DOI: 10.1039/d0cp00650e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chemical gradients imposed through boundary conditions induce spatial symmetry breaking of Turing patterns in small systems.
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Silva MF, Delmonde MV, Batista BC, Boscheto E, Varela H, Camara GA. Oscillatory electro-oxidation of ethanol on platinum studied by in situ ATR-SEIRAS. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2018.10.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Fukami K, Urata T, Krischer K, Nishi N, Sakka T, Kitada A, Murase K. Spontaneous Formation of Microgroove Arrays on the Surface of p-Type Porous Silicon Induced by a Turing Instability in Electrochemical Dissolution. Chemphyschem 2015; 16:1613-8. [DOI: 10.1002/cphc.201500037] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Indexed: 11/09/2022]
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Crespo-Yapur DA, Bonnefont A, Schuster R, Krischer K, Savinova ER. Sequential Activation and Oscillations of Globally Coupled Microelectrodes during a Bistable Reaction. ChemElectroChem 2014. [DOI: 10.1002/celc.201402029] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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8
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Fan X, Hou J, Sun D, Xi S, Liu Z, Du J, Luo J, Tao C. Mn-oxides catalyzed periodic current oscillation on the anode. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.03.175] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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Mechanistic aspects of oscillations during CO electrooxidation on Pt in the presence of anions: Experiments and simulations. Catal Today 2013. [DOI: 10.1016/j.cattod.2012.05.018] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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10
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Cooperative Behaviour of Pt Microelectrodes during CO Bulk Electrooxidation. Chemphyschem 2013; 14:1117-21. [DOI: 10.1002/cphc.201300105] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Indexed: 11/07/2022]
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Ruvinskiy P, Bonnefont A, Savinova E. 3D-ordered layers of vertically aligned carbon nanofilaments as a model approach to study electrocatalysis on nanomaterials. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.03.134] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Sadeghi S, Thompson M. Towards information processing from nonlinear physical chemistry: A synthetic electrochemical cognitive system. Biosystems 2010; 102:99-111. [DOI: 10.1016/j.biosystems.2010.08.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2010] [Accepted: 08/02/2010] [Indexed: 10/19/2022]
Affiliation(s)
- Saman Sadeghi
- Crump Institute for Molecular Imaging, UCLA, 570 Westwood Plaza, Building 114, Los Angeles, CA 90095, USA.
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Bauer PR, Bonnefont A, Krischer K. Spatially Resolved ATR-FTIRS Study of the Formation of Macroscopic Domains and Microislands during CO Electrooxidation on Pt. Chemphyschem 2010; 11:3002-10. [PMID: 20715270 DOI: 10.1002/cphc.201000301] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Philipp R Bauer
- Physik-Department E19a, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany
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Ruvinskiy PS, Bonnefont A, Bayati M, Savinova ER. Mass transport effects in CO bulk electrooxidation on Pt nanoparticles supported on vertically aligned carbon nanofilaments. Phys Chem Chem Phys 2010; 12:15207-16. [DOI: 10.1039/c0cp00593b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Singh S, Barden WRT, Kruse P. Nanopatterning of transition metal surfaces via electrochemical dimple array formation. ACS NANO 2008; 2:2453-2464. [PMID: 19206279 DOI: 10.1021/nn8003789] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Nanoscale surface patterning is of great importance for applications ranging from catalysts to biomaterials. We show the formation of ordered nanoscale dimple arrays on titanium, tungsten, and zirconium during electropolishing, demonstrating versatility of a process previously only reported for tantalum. This is a rare example of an electrochemical pattern formation process that can be translated to other materials. The dimpled surfaces have been characterized with scanning electron microscopy, transmission electron microscopy, atomic force microscopy, and X-ray photoelectron spectroscopy, and electrochemical conditions were optimized for each material. While conditions for titanium and tungsten resemble those for tantalum, zirconium requires a different type of electrolyte. Given the appropriate electropolishing chemistry, formation of these patterns should be possible on any metal surface. The process is very robust on homogeneous surfaces, but sensitive to inhomogeneities in chemical composition, such as in the case of differentially etched alloys. An alternative process for some materials such as platinum is the coating of a dimpled substrate with a thin film of the required material.
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Affiliation(s)
- Sherdeep Singh
- Department of Chemistry, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada
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Self-organization in nonlinear dynamical systems and its relation to the materials science. J Solid State Electrochem 2008. [DOI: 10.1007/s10008-008-0554-y] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Bonnefont A, Varela H, Krischer K. Stationary spatial patterns during bulk CO electrooxidation on platinum. J Phys Chem B 2007; 109:3408-15. [PMID: 16851372 DOI: 10.1021/jp045821v] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We present experimental studies and mathematical modeling on pattern formation during bulk CO electrooxidation on Pt ring electrodes. Profiles of the interfacial potential drop in front of the working electrode were recorded with a potential probe. Stationary self-organized potential patterns were observed under potentiostatic conditions in dilute acidic and basic supporting electrolytes. The amplitude and shape of these potential patterns can be modified by an appropriate local perturbation of the interfacial potential drop. A mathematical model of the formation of these patterns reveals that the homogeneous state becomes unstable through a subcritical Turing-like bifurcation and that several patterned electrode states coexist in wide parameter ranges.
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Affiliation(s)
- Antoine Bonnefont
- Fritz-Haber-Institut der MPG, Faradayweg 4-6, D-14195 Berlin, Germany
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Malkhandi S, Bonnefont A, Krischer K. Strictly potentiostatic current oscillations during bulk CO electro-oxidation on platinum in the presence of inhibiting anions. Electrochem commun 2005. [DOI: 10.1016/j.elecom.2005.04.022] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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20
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Kiss IZ, Brackett AW, Hudson JL. Nonuniform Reaction Rates during CO and CO/H2 Oxidation on Coupled Pt Electrodes. J Phys Chem B 2004. [DOI: 10.1021/jp0494943] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- István Z. Kiss
- Department of Chemical Engineering, 102 Engineers' Way, University of Virginia, Charlottesville, Virginia 22904-4741
| | - Andrew W. Brackett
- Department of Chemical Engineering, 102 Engineers' Way, University of Virginia, Charlottesville, Virginia 22904-4741
| | - John L. Hudson
- Department of Chemical Engineering, 102 Engineers' Way, University of Virginia, Charlottesville, Virginia 22904-4741
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21
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On some dynamic peculiarities of the charge transfer with adsorption and attractive interactions. Electrochim Acta 2004. [DOI: 10.1016/j.electacta.2004.01.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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22
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Bonnefont A, Varela H, Krischer K. Stationary Small and Large Amplitude Patterns during Bulk CO Electrooxidation on Platinum. Chemphyschem 2003; 4:1260-3. [PMID: 14653011 DOI: 10.1002/cphc.200300874] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Antoine Bonnefont
- Fritz-Haber-Institut der Max Planck Gesellschaft Faradayweg 4-6, 14195 Berlin, Germany
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Bîrzu A, Plenge F, Jaeger NI, Hudson JL, Krischer K. Complex Spatiotemporal Antiphase Oscillations during Electrodissolution of a Metal Disk Electrode: Model Calculations. J Phys Chem B 2003. [DOI: 10.1021/jp022457w] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Adrian Bîrzu
- Department of Physics, Technical University of München, James-Franck-Strasse 1, 85748 Garching, Germany, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany, Institute for Applied and Physical Chemistry, University of Bremen, FB 2-Biology/Chemistry, Postfach 330 440, 28334 Bremen, Germany, and Department of Chemical Engineering, 102 Engineers' Way, University of Virginia, Charlottesville, Virginia 22904-4741
| | - Florian Plenge
- Department of Physics, Technical University of München, James-Franck-Strasse 1, 85748 Garching, Germany, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany, Institute for Applied and Physical Chemistry, University of Bremen, FB 2-Biology/Chemistry, Postfach 330 440, 28334 Bremen, Germany, and Department of Chemical Engineering, 102 Engineers' Way, University of Virginia, Charlottesville, Virginia 22904-4741
| | - Nils I. Jaeger
- Department of Physics, Technical University of München, James-Franck-Strasse 1, 85748 Garching, Germany, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany, Institute for Applied and Physical Chemistry, University of Bremen, FB 2-Biology/Chemistry, Postfach 330 440, 28334 Bremen, Germany, and Department of Chemical Engineering, 102 Engineers' Way, University of Virginia, Charlottesville, Virginia 22904-4741
| | - John L. Hudson
- Department of Physics, Technical University of München, James-Franck-Strasse 1, 85748 Garching, Germany, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany, Institute for Applied and Physical Chemistry, University of Bremen, FB 2-Biology/Chemistry, Postfach 330 440, 28334 Bremen, Germany, and Department of Chemical Engineering, 102 Engineers' Way, University of Virginia, Charlottesville, Virginia 22904-4741
| | - Katharina Krischer
- Department of Physics, Technical University of München, James-Franck-Strasse 1, 85748 Garching, Germany, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany, Institute for Applied and Physical Chemistry, University of Bremen, FB 2-Biology/Chemistry, Postfach 330 440, 28334 Bremen, Germany, and Department of Chemical Engineering, 102 Engineers' Way, University of Virginia, Charlottesville, Virginia 22904-4741
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Destabilizing role of the double layer for a dissolution–depassivation mechanism. J Electroanal Chem (Lausanne) 2002. [DOI: 10.1016/s0022-0728(01)00746-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Birzu A, Green BJ, Otterstedt RD, Hudson JL, Jaeger NI. Spatiotemporal Patterns on a Disk Electrode: Effects of Cell Geometry and Electrolyte Properties. ACTA ACUST UNITED AC 2002. [DOI: 10.1524/zpch.2002.216.4.459] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Spatiotemporal patterns on a disk electrode are simulated with a model for the electrodissolution of a metal that exhibits passivity; a 3-dimensional geometry with a point reference electrode is used. The two variables of the model are the potential drop across the electric double layer and the proton concentration near the surface of the working electrode. Non-local coupling among reaction sites is through the electric field. Several patterns seen previously in experiments are reproduced in the simulations and the dependence of transitions among them on system geometry, electrolyte conductivity and double layer capacitance are explored. For example, a state with an inhomogeneous oscillation is changed to one with a rotating wave as the reference electrode is moved closer to the working electrode and negative coupling develops; under other conditions the negative coupling produces anti-phase oscillations.
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Varela H, Krischer K. Nonlinear phenomena during electrochemical oxidation of hydrogen on platinum electrodes. Catal Today 2001. [DOI: 10.1016/s0920-5861(01)00347-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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27
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Plenge F, Rodin P, Schöll E, Krischer K. Breathing current domains in globally coupled electrochemical systems: a comparison with a semiconductor model. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2001; 64:056229. [PMID: 11736076 DOI: 10.1103/physreve.64.056229] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2001] [Indexed: 05/23/2023]
Abstract
Spatio-temporal bifurcations and complex dynamics in globally coupled intrinsically bistable electrochemical systems with an S-shaped current-voltage characteristic under galvanostatic control are studied theoretically on a one-dimensional domain. The results are compared with the dynamics and the bifurcation scenarios occurring in a closely related model which describes pattern formation in semiconductors. Under galvanostatic control both systems are unstable with respect to the formation of stationary large amplitude current domains. The current domains as well as the homogeneous steady state exhibit oscillatory instabilities for slow dynamics of the potential drop across the double layer, or across the semiconductor device, respectively. The interplay of the different instabilities leads to complex spatio-temporal behavior. We find breathing current domains and chaotic spatio-temporal dynamics in the electrochemical system. Comparing these findings with the results obtained earlier for the semiconductor system, we outline bifurcation scenarios leading to complex dynamics in globally coupled bistable systems with subcritical spatial bifurcations.
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Affiliation(s)
- F Plenge
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
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Koper MTM, Schmidt TJ, Marković NM, Ross PN. Potential Oscillations and S-Shaped Polarization Curve in the Continuous Electro-oxidation of CO on Platinum Single-crystal Electrodes. J Phys Chem B 2001. [DOI: 10.1021/jp011410s] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Marc T. M. Koper
- Schuit Institute of Catalysis, Laboratory of Inorganic Chemistry and Catalysis, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands, and Materials Science Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720
| | - Thomas J. Schmidt
- Schuit Institute of Catalysis, Laboratory of Inorganic Chemistry and Catalysis, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands, and Materials Science Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720
| | - Nenad M. Marković
- Schuit Institute of Catalysis, Laboratory of Inorganic Chemistry and Catalysis, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands, and Materials Science Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720
| | - Philip N. Ross
- Schuit Institute of Catalysis, Laboratory of Inorganic Chemistry and Catalysis, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands, and Materials Science Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720
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Krischer K, Mazouz N, Grauel P. Fronts, Waves, and Stationary Patterns in Electrochemical Systems. Angew Chem Int Ed Engl 2001; 40:850-869. [DOI: 10.1002/1521-3773(20010302)40:5<850::aid-anie850>3.0.co;2-3] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2000] [Indexed: 11/05/2022]
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32
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Spontaneous formation of spatiotemporal patterns at the electrode∣electrolyte interface. J Electroanal Chem (Lausanne) 2001. [DOI: 10.1016/s0022-0728(00)00490-3] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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