title: Ion-selective gold-thiol film on integrated screen-printed electrodes for analysis of Cu(II) ions.
abstract: A novel type of ion-selective electrode (ISE) was manufactured for detecting trace amounts of Cu(II) ions. The basic substrates of ISE were fabricated using screen-printing technology, which could produce disposable electrodes on a large-scale with good repeatability. Moreover, the printed integrated three-electrode system of ISE could be directly used to read out the open-circuit potentials by a handheld device through a USB port. The ion-selective film was composed of gold nanorods (GNRs) and 6-(bis(pyridin-2-ylmethyl)amino)hexane-1-thiol (compound ), which were layer-by-layer modified on the electrode through an easily controlled self-assembly method. Compound contained the 2,2'-dipyridylamine (dpa) group that could coordinate with Cu(II) ions to form a 2 : 1 complex, therefore the screen-printed ISEs exhibited Nernstian potentiometric responses to Cu(II) ions with a detection limit of 6.3 × 10(-7) mol L(-1) over the range of 1.0 × 10(-6) to 1.0 × 10(-2) mol L(-1). The easily prepared screen-printed ion-selective electrode reported here was appropriate for in field analysis and pollutant detection in remote environments.
authors.affiliation: Key Laboratory for Advanced Materials & Department of Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P.R. China. ytlong@ecust.edu.cn.
authors.forename: Meng
authors.initials: M
authors.lastname: Li
authors.forename: Hao
authors.initials: H
authors.lastname: Zhou
authors.forename: Lei
authors.initials: L
authors.lastname: Shi
authors.forename: Da-Wei
authors.initials: DW
authors.lastname: Li
authors.forename: Yi-Tao
authors.initials: YT
authors.lastname: Long