Microfluidic platform for environmental contaminants sensing and degradation based on boron-doped diamond electrodes
Medina-Sánchez, Mariana (Institut Català de Nanociència i Nanotecnologia)
Mayorga-Martinez, Carmen C. (Institut Català de Nanociència i Nanotecnologia)
Watanabe, Takeshi (Keio University. Department of Chemistry)
Ivandini, Tribidasari A. (University of Indonesia. Department of Chemistry)
Honda, Yuki (Keio University. Department of Chemistry)
Pino, Flavio (Institut Català de Nanociència i Nanotecnologia)
Nakata, Kazuya (Tokyo University of Science. Research Institute for Science and Technology)
Fujishima, Akira (Tokyo University of Science. Research Institute for Science and Technology)
Einaga, Yasuaki (Keio University. Department of Chemistry)
Merkoçi, Arben (Institut Català de Nanociència i Nanotecnologia)

Data:	2016
Resum:	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.
Ajuts:	Ministerio de Economía y Competitividad SEV-2013-0295 Ministerio de Ciencia e Innovación PIB2010JP-00278
Drets:	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.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Atrazine detection ; Atrazine degradation ; Biosensor ; Boron-doped diamond electrode ; Microfluidics ; Platinum nanostructured particles
Publicat a:	Biosensors & bioelectronics, Vol. 75 (Jan. 2016) , p. 365-374, ISSN 1873-4235

DOI: 10.1016/j.bios.2015.08.058

Postprint 26 p, 1.1 MB

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