The oxidation of metals is a common problem that can lead to corrosion and other damage. One way to prevent oxidation is to create a protective layer of oxide on the surface of the metal. However, this can be difficult to achieve on certain surfaces, such as those with atom-high steps.
A recent study by researchers at the University of Cambridge has revealed how atom-high steps can impede the oxidation of metal surfaces. The study, published in the journal Nature Materials, used a combination of microscopy techniques to image the surface of a metal oxide film as it grew on a metal surface.
The researchers found that the atom-high steps acted as barriers to the growth of the oxide film. This is because the steps create a higher energy barrier for the oxygen atoms to overcome in order to reach the metal surface. As a result, the oxide film grows more slowly on the stepped surface than on a flat surface.
This discovery could have important implications for the development of new materials that are resistant to oxidation. By understanding how atom-high steps can impede oxidation, researchers may be able to design materials that are more durable and longer lasting.
The study was led by Dr. James Dynes, a researcher in the Department of Materials Science and Metallurgy at the University of Cambridge. Dr. Dynes said, "Our findings provide new insights into the mechanisms of oxidation on metal surfaces. This could lead to the development of new materials that are more resistant to corrosion and other forms of damage."
The study was funded by the European Research Council.
