Electrical Contacts to Graphene by Postgrowth Patterning of Cu Foil for the Low-Cost Scalable Production of Graphene-Based Flexible Electronics - Lee Kyung Bae; Seong Gyun Son; Sang-Chan Park; Won Gyun Park; Kiwan Kim; Hyo-Ju Lee; Daeun Bang; Su-Ho Cho; Il-Suk Kang; Jae-Hyuk Ahn (ACS Omega)