Graphene P-N Junction

hello buddies . here is one more interesting scientific invention . georgia tech has invented new p-n junctions using graphene. i request you people to go through the article in below link.
https://www.newelectronics.co.uk/electronics-news/p-n-junctions-created-using-graphene/46720/.and
https://www.sciencedaily.com/articles/matter_energy/graphene/11/
hope you find it interesting. and please dont forget to post your views and comments.