A team of Israel Technion researchers including Professor Hossam Haick (famous for the cancer breath test) has developed a synthetic polymer that mimics human skin and can be integrated into flexible devices so that future smartphones will be able to “heal” any scratches or damage.

http://www.timesofisrael.com/coming-soon-iphones-that-can-heal-themselves/

http://onlinelibrary.wiley.com/doi/10.1002/adma.201504104/full