title: Ultrahigh mobility in polyolefin-supported graphene.
abstract: A high carrier mobility is an important parameter for graphene-based electronics. While the recent reports have shown impressive results for individual micro-scale devices, scalable production of high mobility graphene has been challenging. We here show that centimeter-scale graphene devices with room temperature carrier mobilities in excess of 10 000 cm(2) V(-1) s(-1) can be achieved on polyolefinic substrates. Measurements on Parafilm-supported graphene devices show, on average, a fivefold-enhancement in mobility over traditional devices. We find that a decreased charged-impurity scattering is the origin of this behavior. Spectroscopic characterization reveals oxygen-containing polymer residue as the main source of such charged impurities. A comparison of different polyolefins highlights the positive impact of oxygen-free polymers as support materials for high mobility graphene devices. Finally, moldable and wearable graphene devices for biosensors were shown to be enabled by polyolefinic substrates.
authors.affiliation: Graduate of Institute of Opto-Mechatronics, National Chung Cheng University, 168, University Rd., Min-Hsiung, Chia-Yi, 62102, Taiwan. yphsieh@ccu.edu.tw.
authors.forename: Ya-Ping
authors.initials: YP
authors.lastname: Hsieh
authors.affiliation: Graduate of Institute of Opto-Mechatronics, National Chung Cheng University, 168, University Rd., Min-Hsiung, Chia-Yi, 62102, Taiwan. yphsieh@ccu.edu.tw.
authors.forename: Chin-Lun
authors.initials: CL
authors.lastname: Kuo
authors.affiliation: Department of Material Science and Engineering, National Cheng Kung University, Tainan, 62102, Taiwan.
authors.forename: Mario
authors.initials: M
authors.lastname: Hofmann