Self-healing materials are able to repair autonomously defects, such as scratches, cracks or dents, and resume their original shape. For this purpose, they must be composed of several components whose combined properties result in the desired characteristics. Scientists have now discovered that also tiny particles of pure gold have surprising self-healing capacities.
from Engineering and Construction News – ScienceDaily https://www.sciencedaily.com/releases/2017/09/170914152301.htm
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