title: A novel flexible capacitive touch pad based on graphene oxide film.
abstract: Recently, graphene oxide (GO) supercapacitors with ultra-high energy densities have received significant attention. In addition to energy storage, GO capacitors might also have broad applications in renewable energy engineering, such as vibration and sound energy harvesting. Here, we experimentally create a macroscopic flexible capacitive touch pad based on GO film. An obvious touch "ON" to "OFF" voltage ratio up to ∼60 has been observed. Moreover, we tested the capacitor structure on both flat and curved surfaces and it showed high response sensitivity under fast touch rates. Collectively, our results raise the exciting prospect that the realization of macroscopic flexible keyboards with large-area graphene based materials is technologically feasible, which may open up important applications in control and interface design for solar cells, speakers, supercapacitors, batteries and MEMS systems.
authors.affiliation: Institute of Microelectronics, Tsinghua University, Beijing 100084, China.
authors.forename: He
authors.initials: H
authors.lastname: Tian
authors.forename: Yi
authors.initials: Y
authors.lastname: Yang
authors.forename: Dan
authors.initials: D
authors.lastname: Xie
authors.forename: Tian-Ling
authors.initials: TL
authors.lastname: Ren
authors.forename: Yi
authors.initials: Y
authors.lastname: Shu
authors.forename: Chang-Jian
authors.initials: CJ
authors.lastname: Zhou
authors.forename: Hui
authors.initials: H
authors.lastname: Sun
authors.forename: Xuan
authors.initials: X
authors.lastname: Liu
authors.forename: Cang-Hai
authors.initials: CH
authors.lastname: Zhang
mesh_terms: D003217:Conductometry / Q000295:instrumentation*; D055119:Elastic Modulus; D025802:Electric Capacitance; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006108:Graphite / Q000737:chemistry*; D008365:Manometry / Q000295:instrumentation*; D008567:Membranes, Artificial; D010087:Oxides / Q000737:chemistry*; D013314:Stress, Mechanical; D014110:Touch
chemical_list: D008567:Membranes, Artificial; D010087:Oxides; D006108:Graphite