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Metal Deposition by Inducing a Microgalvanic Cell with the Scanning Electrochemical Microscope (SECM)
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Valentin Radtke
Published/Copyright:
September 25, 2009
A new mechanism of metal deposition on conducting surfaces is presented. But in contrast to former procedures where metal ions were deposited by electrolysis on a conducting cathodically polarised surface, now the deposition occurs without any additional electrochemical energy even if the substrate metal is more noble than the deposited metal. This phenomenon can be explained by the formation of a microgalvanic cell as a consequence of the tip reaction. The process is similar to the effects of a local element well known in corrosion science. The latter one is an undesirable effect due to surface impurities whereas the former one can be targeted on generating microstructures. In this paper, we will show that the mechanism of deposition is congenerous to that one of the positive feedback, since both may occur on a nonpolarised conducting surface. Both are “tip-induced” electrochemical cells with a positive electromotive force.
Keywords: Scanning Electrochemical Microscopy; SECM; Metal Deposition; Positive Feedback; Tip-Induced Microgalvanic Cell
Received: 2007-6-22
Accepted: 2007-7-23
Published Online: 2009-9-25
Published in Print: 2007-10-1
© Oldenbourg Wissenschaftsverlag
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Keywords for this article
Scanning Electrochemical Microscopy;
SECM;
Metal Deposition;
Positive Feedback;
Tip-Induced Microgalvanic Cell
Articles in the same Issue
- Preface: Dieter Kolb zum 65. Geburtstag
- Precursor Adsorption of SbBr3 on Au(111) and Au(100) for Antimony Underpotential Deposition in a BMIBF4 Ionic Liquid – A Comparison with SbCl3
- Electroreduction of Nitrate at Copper Electrodes and Copper-PANI Composite Layers
- Potential Program Invariant Representation of Diffusion–Adsorption Related Voltammograms
- A Way for Determining the Effective Three Phase Boundary Width of Solid State Electrochemical Reactions from the Primary and Secondary Current Distribution at Microelectrodes
- Carbon Nanotubes and Electrochemistry
- Pd3Fe and Pt Monolayer-Modified Pd3Fe Electrocatalysts for Oxygen Reduction
- Electrochemical Nucleation and Growth Kinetics of Nanostructured Gold on Rotating Disc and Stationary Electrodes
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- Metal Deposition by Inducing a Microgalvanic Cell with the Scanning Electrochemical Microscope (SECM)
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- Monte Carlo Simulation of Kinetically Limited Electrodeposition on a Surface with Metal Seed Clusters
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- Hydrogen Adsorption on Activated Platinum Electrodes – An Electrochemical Impedance Spectroscopy Study
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- Electrocatalytic Trends on IB Group Metals: The Oxygen Reduction Reaction
- DFT Studies on the Nature of Coadsorbates on SO42-/Au(111)
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