title: Highly sensitive and multifunctional tactile sensor using free-standing ZnO/PVDF thin film with graphene electrodes for pressure and temperature monitoring.
abstract: We demonstrate an 80-μm-thick film (which is around 15% of the thickness of the human epidermis), which is a highly sensitive hybrid functional gauge sensor, and was fabricated from poly(vinylidene fluoride) (PVDF) and ZnO nanostructures with graphene electrodes. Using this film, we were able to simultaneously measure pressure and temperature in real time. The pressure was monitored from the change in the electrical resistance via the piezoresistance of the material, and the temperature was inferred based on the recovery time of the signal. Our thin film system enabled us to detect changes in pressure as small as 10 Pa which is pressure detection limit was 10(3)-fold lower than the minimum level required for artificial skin, and to detect temperatures in the range 20-120 °C.
authors.affiliation: World Class University program of Chemical Convergence for Energy &Environment, School of Chemical and Biological Engineering, Seoul National University, 151-742, Korea.
authors.forename: James S
authors.initials: JS
authors.lastname: Lee
authors.affiliation: World Class University program of Chemical Convergence for Energy &Environment, School of Chemical and Biological Engineering, Seoul National University, 151-742, Korea.
authors.forename: Keun-Young
authors.initials: KY
authors.lastname: Shin
authors.affiliation: World Class University program of Chemical Convergence for Energy &Environment, School of Chemical and Biological Engineering, Seoul National University, 151-742, Korea.
authors.forename: Oug Jae
authors.initials: OJ
authors.lastname: Cheong
authors.affiliation: Manufacturing Technology Team, Infra Technology Service Center, Device Business, Samsung Electronics, San #16 Banwol-Dong, Hwasung-City, Gyeonggi-Do, Korea.
authors.forename: Jae Hyun
authors.initials: JH
authors.lastname: Kim
authors.affiliation: World Class University program of Chemical Convergence for Energy &Environment, School of Chemical and Biological Engineering, Seoul National University, 151-742, Korea.
authors.forename: Jyongsik
authors.initials: J
authors.lastname: Jang
mesh_terms: D015374:Biosensing Techniques; D004566:Electrodes; D006108:Graphite / Q000737:chemistry*; D006801:Humans; D049329:Nanostructures; D011145:Polyvinyls / Q000737:chemistry; D011312:Pressure; D013696:Temperature; D015034:Zinc Oxide / Q000737:chemistry; D005465:Fluorocarbon Polymers
chemical_list: D006108:Graphite; D011145:Polyvinyls; D015034:Zinc Oxide; C024865:polyvinylidene fluoride; D005465:Fluorocarbon Polymers