Synthesis of integrated graphene films with self-assembled single-layer channels and multi-layer electrodes via a single process. (October 2016)

• Record Type: Journal Article
• Authors: Jung, Daesung; Jung, Min Wook; Kim, Seok Hwan; Song, Wooseok; Kim, Yooseok; Lee, Sun Sook; Lee, Jeong-O.; Park, Chong-Yun; An, Ki-Seok
• Is Part Of: Carbon. Volume 107(2016)
• Page Start: 837
• Page End: 843
• Publication Date: 2016-10
• Subjects: Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2016.06.092
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: Integrated graphene films (IGFs) with self-assembled single-layer graphene as a channel and multi-layer graphene as an electrode material were synthesized simultaneously using a one-step process by thermal chemical vapor deposition. The prominent difference in graphene growth rate between Ni and Cu catalytic substrates made enable to synthesize the IGFs with self-assembled single-layer and multi-layer graphene on a Cu foil with pre-patterned Ni films. The thickness of multi-layer graphene for IGFs was precisely controlled by optimizing conditions including the injection temperature of carbon feedstock and the surface concentration of Ni atoms affected by the inter-diffusion related to the growth temperature and time. The thickness and crystallinity of synthesized IGFs were evaluated by resonant Raman spectroscopy. We fabricated the IGFs-based field effect transistors (FETs) to examine electrical transport properties of the films. These results suggest that the synthesis technique for IGFs could lead to mass fabrication of wearable graphene-based FETs in the near future.