title: A Resettable Keypad Lock with Visible Readout Based on Closed Bipolar Electrochemistry and Electrochromic Poly(3-methylthiophene) Films.
abstract: A closed bipolar electrode (BPE) system was developed with electrochromic poly(3-methylthiophene) (PMT) films electropolymerized on the ITO/rGO electrode as one pole of BPE in the reporting reservoir and the bare ITO electrode as another pole of BPE in the analyte reservoir, in which rGO represents reduced graphene oxide. Under a suitable driving voltage (Vtot), the electrochemical reduction/oxidation of electroactive probes, such as H2O2/glutathione (Glu), in the analyte reservoir could induce the reversible color change of PMT films in the reporting reservoir between blue and red. Based on this, a keypad lock with H2O2 , Glu, and Vtot =-3.0 V as the three inputs and the color change of PMT films as the visible output was established. This system was easily operated and did not need to synthesize the complex compounds or DNA molecules. The security system was easy to reset and could be used repeatedly.
authors.affiliation: College of Chemistry, Beijing Normal University, Beijing, 100875, People's Republic of China.
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.affiliation: College of Chemistry, Beijing Normal University, Beijing, 100875, People's Republic of China.
authors.forename: Wenjing
authors.initials: W
authors.lastname: Lian
authors.affiliation: College of Chemistry, Beijing Normal University, Beijing, 100875, People's Republic of China. liuhongyun@bnu.edu.cn.|Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing, 100875, People's Republic of China. liuhongyun@bnu.edu.cn.
authors.forename: Hongyun
authors.initials: H
authors.lastname: Liu
mesh_terms: D004247:DNA / Q000737:chemistry*; D055664:Electrochemical Techniques; D004563:Electrochemistry; D006108:Graphite / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry*; D010084:Oxidation-Reduction; D011108:Polymers / Q000737:chemistry*; D013876:Thiophenes / Q000737:chemistry*
chemical_list: D011108:Polymers; D013876:Thiophenes; D006108:Graphite; C062788:poly(3-methylthiophene); D004247:DNA; D006861:Hydrogen Peroxide
keywords: electrochemistry; keypad lock; molecular devices; resettability; visible readout