Home > Articles > Published articles > Microfluidic platform for environmental contaminants sensing and degradation based on boron-doped diamond electrodes |
Date: | 2016 |
Abstract: | We have developed a lab-on-a-chip (LOC) platform for electrochemical detection and degradation of the pesticide atrazine (Atz). It is based on boron-doped diamond (BDD) electrodes and a competitive magneto-enzyme immunoassay (EIA) that enables high sensitivity. To detect the enzymatic reaction, we employed a BDD electrode modified with platinum nanoparticles (PtNPs), as a highly conductive catalytic transducer. Chronoamperometry revealed a limit of detection (LOD) of 3. 5pM for atrazine, which, to the best of our knowledge, is one of the lowest value published to date. Finally, we degraded Atz in the same platform, using a bare BDD electrode that features remarkable corrosion stability, a wide potential window, and much higher O overvoltage as compared to conventional electrodes. These characteristics enable the electrode to produce a greater amount of HO on the anode surface than do conventional electrodes and consequently, to destroy the pollutant more rapidly. Our new LOC platform might prove interesting as a smart system for detection and remediation of diverse pesticides and other contaminants. |
Grants: | Ministerio de Economía y Competitividad SEV-2013-0295 Ministerio de Ciencia e Innovación PIB2010JP-00278 |
Rights: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. |
Language: | Anglès |
Document: | Article ; recerca ; Versió acceptada per publicar |
Subject: | Atrazine detection ; Atrazine degradation ; Biosensor ; Boron-doped diamond electrode ; Microfluidics ; Platinum nanostructured particles |
Published in: | Biosensors & bioelectronics, Vol. 75 (Jan. 2016) , p. 365-374, ISSN 1873-4235 |
Postprint 26 p, 1.1 MB |