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|Title:||Scanning tunnelling microscopy study of palladium on stepped Cu(210) surfaces: chemical contrast and room-temperature tip-induced motion|
|Authors:||Wee, A.T.S. |
|Source:||Wee, A.T.S., Dixon, R.A., Egdell, R.G., Foord, J.S., Fishlock, T.W., Pethica, J.B. (1999-11-10). Scanning tunnelling microscopy study of palladium on stepped Cu(210) surfaces: chemical contrast and room-temperature tip-induced motion. Surface Science 442 (1) : 55-64. ScholarBank@NUS Repository. https://doi.org/10.1016/S0039-6028(99)00884-5|
|Abstract:||The chemical contrast and tip-induced motion of palladium on stepped Cu(210) surfaces at room temperature have been studied by scanning tunnelling microscopy (STM). Contrast inversion is shown to be useful for chemical-sensitive imaging and features such as fringing can be resolved. Step edges and kinks are shown to be thermodynamically more stable palladium adsorption sites. Tip-induced motion of palladium adatoms on Cu(210) at 300 K has been demonstrated with a threshold gap resistance of 20-50 MΩ. Annealing the palladium-covered surface to 600-700 K results in the ejection of copper atoms to form crystalline copper islands which lie across the substrate steps with their  axes aligned to the  substrate axis.|
|Source Title:||Surface Science|
|Appears in Collections:||Staff Publications|
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