title: Reversible nanostructuration of microfluidic electrode devices by CNT magnetic co-entrapment.
abstract: Carbon nanotubes (CNTs) have been extensively used to produce electrodes of enhanced performance but have only been very recently exploited in microfluidic devices. In these cases, CNT electrodes had to be produced prior to device assembly, which might damage the CNT layer. Here, we show a fast and simple method for the reversible nanostructuration of microfluidic electrode devices in situ. The procedure is based on the attachment of single-walled CNTs (SWCNTs) onto the surface of magnetic particles (MPs) and magnetic confinement of the MP/SWCNT composite onto the sensor in a two-step process that provided homogeneous coating. As it is shown, subsequent magnet removal allows MP/SWCNT release and electrode reutilization. Compared to most previously described methods, ours is faster, simpler and also reversible.
authors.affiliation: IK4-Ikerlan Technological Research Centre, 20500 Mondragón, Spain.
authors.forename: Zorione
authors.initials: Z
authors.lastname: Herrasti
authors.forename: Fernando
authors.initials: F
authors.lastname: Martínez
authors.forename: Eva
authors.initials: E
authors.lastname: Baldrich
mesh_terms: D004566:Electrodes; D005295:Ferrocyanides / Q000737:chemistry; D056656:Lab-On-A-Chip Devices; D008280:Magnetics; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation / Q000379:methods*; D037742:Nanotubes, Carbon / Q000737:chemistry*
chemical_list: D005295:Ferrocyanides; D037742:Nanotubes, Carbon; C020354:hexacyanoferrate II