title: Amplified fluorescent assay of potassium ions using graphene oxide and a conjugated cationic polymer.
abstract: We present a low background, highly selective and amplified fluorescent sensor for potassium ions using graphene oxide (GO) and a cationic conjugated polymer (CCP). This method takes advantage of the phenomenon that the addition of CCP cannot release the dye labeled guanine-rich DNA from the GO surface, and the conformational switch of the guanine-rich DNA from random coil to G-quadruplex induced by the target.
authors.affiliation: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Research Center for Nanobiology and Nanomedicine (MOE 985 Innovative Platform), Wuhan Institute of Biotechnology, and State Key Laboratory of Virology, Wuhan University, Wuhan, 430072, P. R. China. hwtang@whu.edu.cn.
authors.forename: Xiao-Jing
authors.initials: XJ
authors.lastname: Xing
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhou
authors.forename: Xue-Guo
authors.initials: XG
authors.lastname: Liu
authors.forename: Hong-Wu
authors.initials: HW
authors.lastname: Tang
authors.forename: Dai-Wen
authors.initials: DW
authors.lastname: Pang
mesh_terms: D005456:Fluorescent Dyes / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D011188:Potassium / Q000032:analysis*; D013050:Spectrometry, Fluorescence / Q000379:methods; D013917:Thrombin / Q000032:analysis
chemical_list: D005456:Fluorescent Dyes; D010087:Oxides; D011108:Polymers; D006108:Graphite; D013917:Thrombin; D011188:Potassium