In Suspended graphene SiO2 layer is removed by etching which eliminat charges in SiO2 and after annealing produce high quality graphene why?

04 April 2017 1 4K Report

plz answer instantly

because Si02 has a lot of charge on its surface that generates disorder in graphene.

removing Soi02 in contact with graphene removes its disorder on the back side.

After that annealing removes adsorbates on the top side of graphene by evaporation leading to clean graphene on its both sides

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