title: Thinner is Better: An Ultrathin Conducting Oligoaniline Film for Gas Microsensors with Ultralow Detection Limits.
abstract: An ultralow-limit gas microsensor based on an ultrathin conducting oligoaniline film integrated with microscale gold electrodes is developed. A nanoscale oligoaniline film is fabricated on a poly(dimethylsiloxane) (PDMS) substrate using graft polymerization using FeCl(3) , a mild oxidant, rather than conventional (NH(4) )(2) S(2) O(8) . The as-fabricated film is around 14 nm in thickness and above 85% transmittance on a PDMS substrate with a smooth surface morphology and high conductivity. Taking NH(3) as a protocol, the nanoscale oligoaniline film microsensor shows an ultralow detection limit to the ppb level with more rapid response and high sensitivity to NH(3) compared to the thicker PANI film using conventional methods.
authors.affiliation: Department of Chemistry, Renmin University of China, Beijing, 100872, P.R. China.
authors.forename: Zhuang
authors.initials: Z
authors.lastname: Xie
authors.forename: Liting
authors.initials: L
authors.lastname: Duan
authors.forename: Yuqian
authors.initials: Y
authors.lastname: Jiang
authors.forename: Mianqi
authors.initials: M
authors.lastname: Xue
authors.forename: Meining
authors.initials: M
authors.lastname: Zhang
authors.forename: Tingbing
authors.initials: T
authors.lastname: Cao