title: High performance flexible pH sensor based on polyaniline nanopillar array electrode.
abstract: Flexible pH sensor technologies have attracted a great deal of attention in many applications, such as, wearable health care devices and monitors for chemical and biological processes. Here, we fabricated flexible and thin pH sensors using a two electrode configuration comprised of a polyaniline nanopillar (PAN) array working electrode and an Ag/AgCl reference electrode. In order to provide nanostructure, soft lithography using a polymeric blend was employed to create a flexible nanopillar backbone film. Polyaniline-sensing materials were deposited on a patterned-nanopillar array by electrochemical deposition. The pH sensors produced exhibited a near-Nernstian response (∼60.3mV/pH), which was maintained in a bent state. In addition, pH sensors showed other excellent sensor performances in terms of response time, reversibility, repeatability, selectivity, and stability.
authors.affiliation: Department of Chemical Engineering, Kangwon National University, Samcheok 25913, Republic of Korea.
authors.forename: Jo Hee
authors.initials: JH
authors.lastname: Yoon
authors.affiliation: Department of Chemical Engineering, Kangwon National University, Samcheok 25913, Republic of Korea.
authors.forename: Seok Bok
authors.initials: SB
authors.lastname: Hong
authors.affiliation: Nano-Bio Application Team, National Nanofab Center, Daejeon 34141, Republic of Korea.
authors.forename: Seok-Oh
authors.initials: SO
authors.lastname: Yun
authors.affiliation: Nano-Bio Application Team, National Nanofab Center, Daejeon 34141, Republic of Korea.
authors.forename: Seok Jae
authors.initials: SJ
authors.lastname: Lee
authors.affiliation: Nano-Bio Application Team, National Nanofab Center, Daejeon 34141, Republic of Korea. Electronic address: tjlee@nnfc.re.kr.
authors.forename: Tae Jae
authors.initials: TJ
authors.lastname: Lee
authors.affiliation: Nano-Bio Application Team, National Nanofab Center, Daejeon 34141, Republic of Korea. Electronic address: kglee@nnfc.re.kr.
authors.forename: Kyoung G
authors.initials: KG
authors.lastname: Lee
authors.affiliation: Department of Chemical Engineering, Kangwon National University, Samcheok 25913, Republic of Korea. Electronic address: bgchoi@kangwon.ac.kr.
authors.forename: Bong Gill
authors.initials: BG
authors.lastname: Choi
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D015374:Biosensing Techniques / Q000295:instrumentation*; D002253:Carbonated Beverages / Q000032:analysis; D032084:Citrus sinensis / Q000737:chemistry; D003069:Coffee / Q000737:chemistry; D055664:Electrochemical Techniques / Q000295:instrumentation*; D004595:Electroplating; D004867:Equipment Design; D006863:Hydrogen-Ion Concentration; D008839:Microelectrodes; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D014867:Water / Q000737:chemistry
chemical_list: D000814:Aniline Compounds; D003069:Coffee; C416807:polyaniline; D014867:Water
keywords: Electrodeposition; Flexible; Nanopillar; Polyaniline; pH sensor