Cu Graphene

Ultrapure Cu foil, anneal/recrystallize in H2 30 min 1020 C then 15 min growth CH4+H2 1010 C. Changhyun, Wu group

• 121016-1-L-b, 1/6 "large", SEM
• 121016-1-L-a, 1/6 "large"
• 121021-1-R-a, 1/6 "small"
• 121021-1-R-b, 1/6 "small"

large and small refer to Cu grain size. Even "small" is ~ 100 um