Nanoarray membrane sensor based on a multilayer design for sensing of water pollutants.
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.
Zhuo
Lin
L
Department of Chemistry, Faculty of Science, 3 Science Drive 3, National University of Singapore, Singapore 117543.
Huang
Yan
Y
Cheng
Ming Soon
MS
Lee
Hian Kee
HK
Toh
Chee-Seng
CS
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*
D005465:Fluorocarbon Polymers; D008567:Membranes, Artificial; D014873:Water Pollutants; C040402:perfluorosulfonic acid; D000537:Aluminum Oxide