Tailor designed exclusive carbon nanomaterial electrodes for off-chip and on-chip electrochemical detection
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Abstract
The authors describe tailor-designed electrodes based on the use of films of carbonaceous nanomaterials with demostrated conductivitiy at the microscale. These represent a unique conductive material for deposition on adaptable nonconductive substrates. Single-walled and multi-walled carbon nanotubes as well as graphene scaffold film electrodes (SFEs) were designed, and their electroanalytical performance was evaluated by using two different designs. The first is a 3-electrode configuration for off-chip detection, and the second is one for on-chip detection of the biomarkers dopamine and catechol at +0.70 V detection potential (vs. Ag/AgCl). The SFEs were fabricated by filtration of conducting carbon nanomaterials using a tailored template. In our perception, they pave the way for a wide field of opportunities in off-chip and microfluidic electrochemistry because of their reliability, ease of fabrication and remarkable performance that is based on the exclusive use of the carbon nanomaterial transducers.
Schematic of tailor-templated electrodes based on films of carbonaceous nanomaterials as unique conductive material on adaptable non-conductive substrates for off-chip and on-chip detection.
Keywords
Carbon nanomaterial SWCNT MWCNTs Microfluidics Graphene scaffold film electrode Voltammetry Chemical sensingNotes
Acknowledgements
The authors are very grateful for the financial support from the Spanish Ministry of Economy and Competitiveness CTQ 2014-58643-R and from the Nanoavansens program from the Community of Madrid (S2013/MIT-3029). A.M. acknowledges the FPU Fellowship received from Spanish Ministry of Education, Culture and Sports.
Compliance with ethical standards
The authors declare that they have no competing interests
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