title: Self-powered humidity sensor based on graphene oxide composite film intercalated by poly(sodium 4-styrenesulfonate).
abstract: This Research Article reports self-powered humidity sensors based on graphene oxide (GO) and poly(sodium 4-styrenesulfonate) (PSS)-intercalated GO composite films used as the humidity-responsive dielectrics. A hydrophilic and electrically-insulating PSS polymer was used as an intercalant between the individual GO platelets to enhance the water permeation characteristics. Capacitive-type humidity sensors fabricated by forming metal electrodes on both sides of the GO and GO-PSS films were installed into the charge pumping system, which can produce a voltage output as a response to humidity sensing. While both sensors based on GO and GO-PSS dielectrics responded stably and reversibly to the changes in RH, the GO-PSS sensor showed enhanced sensing responses compared to the GO sensor, providing ∼5.6 times higher voltage output and 3 times faster responses in humidity sensing.
authors.affiliation: Department of Nanofusion Technology, Pusan National University , 30 Jangjeon-dong, Geumjung-gu, Busan 609-735, South Korea.
authors.forename: Hyun-Woo
authors.initials: HW
authors.lastname: Yu
authors.forename: Hyoung Kyu
authors.initials: HK
authors.lastname: Kim
authors.forename: Taewoo
authors.initials: T
authors.lastname: Kim
authors.forename: Kyoung Min
authors.initials: KM
authors.lastname: Bae
authors.forename: Sung Min
authors.initials: SM
authors.lastname: Seo
authors.forename: Jong-Man
authors.initials: JM
authors.lastname: Kim
authors.forename: Tae June
authors.initials: TJ
authors.lastname: Kang
authors.forename: Yong Hyup
authors.initials: YH
authors.lastname: Kim