title: Nanoarray membrane sensor based on a multilayer design for sensing of water pollutants.
abstract: A ubiquitous electrochemical sensor which can detect pollutants in nonconducting aqueous solutions is prepared using a triple layer design, comprising a polyelectrolyte entrapped within micrometer-length nanochannels and sandwiched between two nanometer-thick electrode layers. Replacement of the polyelectrolyte with an enzyme-polyelectrolyte mixture within the nanochannels confers excellent biosensing characteristics. Its superior analytical performance of quantitating copper ions and formaldehyde at trace levels without additional sample treatment steps is demonstrated in freshwater samples derived from a local reservoir.
authors.affiliation: Department of Chemistry, Faculty of Science, 3 Science Drive 3, National University of Singapore, Singapore 117543.
authors.forename: Lin
authors.initials: L
authors.lastname: Zhuo
authors.forename: Yan
authors.initials: Y
authors.lastname: Huang
authors.forename: Ming Soon
authors.initials: MS
authors.lastname: Cheng
authors.forename: Hian Kee
authors.initials: HK
authors.lastname: Lee
authors.forename: Chee-Seng
authors.initials: CS
authors.lastname: Toh
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry; D015374:Biosensing Techniques; D002623:Chemistry Techniques, Analytical / Q000295:instrumentation* / Q000379:methods*; D004563:Electrochemistry; D004566:Electrodes; D004867:Equipment Design; D005465:Fluorocarbon Polymers / Q000737:chemistry; D054879:Halogenation; D056656:Lab-On-A-Chip Devices; D008567:Membranes, Artificial; D036103:Nanotechnology / Q000295:instrumentation*; D016062:Porosity; D014873:Water Pollutants / Q000032:analysis*
chemical_list: D005465:Fluorocarbon Polymers; D008567:Membranes, Artificial; D014873:Water Pollutants; C040402:perfluorosulfonic acid; D000537:Aluminum Oxide