Interface Physics Group, Prof. Dr. Olaf Magnussen

Institute of Experimental and Applied Physics, Christian-Albrechts-Universität zu Kiel

Atomic Movie Library


The following movies were obtained by our Video-STM and illustrate the atomic scale dynamic behavior of various processes at interfaces between solid metal electrodes and electrolyte solutions. Unless said otherwise the movies show the events in real time if played at conventional video rates (25 Hz). More details on the observed physical and chemical processes can be found in the quoted publications or on the homepage of our group.

Copper dissolution in HCl solution   S-Cu1.jpg
Local dissolution of a Cu(100) electrode in 0.01 M HCl solution at -0.23 V vs. SCE.
Image size: 5 nm x 5 nm
Recording rate: 10 Hz
Reference: O.M. Magnussen, L. Zitzler, B. Gleich, M.R.Vogt, R.J. Behm, Electrochim. Acta, 46, 3725-3733 (2001)
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Copper growth in HCl solution   S-Cu1.jpg
Local copper deposition onto a Cu(100) electrode in 0.01 M HCl solution at -0.23 V vs. SCE.
Image size: 5 nm x 5 nm
Recording rate: 10 Hz
Reference: O.M. Magnussen, L. Zitzler, B. Gleich, M.R.Vogt, R.J. Behm, Electrochim. Acta, 46, 3725-3733 (2001)
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Diffusion and interaction of sulfide adsorbed on copper in HCl solution (1)   S-Cu1.jpg
Sulfide adsorbates on a Cu(100) electrode in 0.01 M HCl solution at -0.38 V vs. SCE.
Image size: 16 nm x 10 nm
Recording rate: 20 Hz
Reference: T. Tansel, O.M. Magnussen, Phys. Rev. Lett., 96, 026101 (2006)
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Diffusion and interaction of sulfide adsorbed on copper in HCl solution (2)   S-Cu1.jpg
Sulfide adsorbates on a Cu(100) electrode in 0.01 M HCl solution at -0.42 V vs. SCE.
Image size: 14 nm x 10 nm
Recording rate: 20 Hz
Reference: T. Tansel, O.M. Magnussen, Phys. Rev. Lett., 96, 026101 (2006)
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Mobile metal nanostructures on gold electrode surfaces (1)   S-Cu1.jpg
Dynamics of stringlike elements of the “hex” surface reconstruction on Au(100) electrodes in 0.01 M Na2SO4 + 0.001 M HCl, recorded directly after a potential step from +0.45 to 0.1 V vs. SCE. The video shows the initial growth and lateral mobility of isolated “hex” strings, the growth of a “hex” string along an isolated string, and the residual lateral mobility of the resulting double string.
Image size: 39 nm x 24 nm
Recording rate: 15 Hz
Reference: M. Labayen, C. Ramirez, W. Schattke, O.M. Magnussen, Nature Materials, 2, 783-787 (2003)
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Mobile metal nanostructures on gold electrode surfaces (2)   S-Cu1.jpg
Dynamics of stringlike elements of the “hex” surface reconstruction on Au(100) electrodes in 0.01 M Na2SO4 + 0.001 M HCl at 0.21 V vs. SCE. The video shows the 2D diffusion, splitting, and reconnection of isolated “hex” strings.
Image size: 28 nm x 16 nm
Recording rate: 20 Hz
Reference: M. Labayen, C. Ramirez, W. Schattke, O.M. Magnussen, Nature Materials, 2, 783-787 (2003)
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Hydrogen-induced reconstruction of copper in HClO4 solution   S-Cu1.jpg
Monolayer island on a Cu(100) electrode in 0.1 M HClO4 solution at variable potentials (see video). Starting from the hydrogen evolution regime, where the Cu surface is reconstructed, the potential is first changed to more positive values, resulting in the lifting of the reconstruction, and then back into the potential regime of the reconstruction. Due to the different density of the reconstructed surface layer, the ifting and reformation of the reconstruction is accompanied by shrinking and expansion of the island, respectively.
Image size: 30 nm x 30 nm
Recording rate: 15 Hz
Reference: H. Matsushima, A. Taranovskyy, C. Haak, Y. Gründer and O.M. Magnussen, J. Am. Chem. Soc. 131, 10362–10363 (2009)
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