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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Céspedes, Francisco
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2016Characterization protocol to improve the electroanalytical response of graphene-polymer nanocomposite sensorscitations
- 2016Highly sensitive electrochemical immunosensor for IgG detection based on optimized rigid biocompositescitations
- 2016Amperometric thyroxine sensor using a nanocomposite based on graphene modified with gold nanoparticles carrying a thiolated β-cyclodextrincitations
- 2016Intermatrix Synthesis as a rapid, inexpensive and reproducible methodology for the in situ functionalization of nanostructured surfaces with quantum dotscitations
- 2016CdS quantum dots as a scattering nanomaterial of carbon nanotubes in polymeric nanocomposite sensors for microelectrode array behaviorcitations
- 2016Intermatrix synthesis of Ag, AgAu and Au nanoparticles by the galvanic replacement strategy for bactericidal and electrocatalytically active nanocompositescitations
- 2015Modified multiwalled carbon nanotube/epoxy amperometric nanocomposite sensors with CuO nanoparticles for electrocatalytic detection of free chlorinecitations
- 2015Improvement of the detection limit for biosensors: Advances on the optimization of biocomposite compositioncitations
- 2015Effect of carbon nanotubes purification on electroanalytical response of near-percolation amperometric nanocomposite sensorscitations
- 2014Towards to the improvement of the analytical response in voltammetric sensors based on rigid compositescitations
- 2014Simple green routes for the customized preparation of sensitive carbon nanotubes/epoxy nanocomposite electrodes with functional metal nanoparticlescitations
- 2012Determination of total polyphenol index in wines employing a voltammetric electronic tonguecitations
- 2011A new amperometric bienzymatic biosensor based on biocomposites for the determination of gluconic acid in winescitations
- 2009Novel amperometric sensor based on rigid near-percolation compositecitations
- 2009Resolution of heavy metal mixtures from highly overlapped ASV voltammograms employing a wavelet neural networkcitations
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article
Effect of carbon nanotubes purification on electroanalytical response of near-percolation amperometric nanocomposite sensors
Abstract
© 2015 The Electrochemical Society. This work focuses on the effect of multiwall carbon nanotubes (MWCNTs) purification methods for their application as conductive materials in the development of MWCNTs/epoxy amperometric nanocomposite (bio)sensors. For this purpose, three different MWCNTs samples with distinctive purities were characterized by Termogravimetric Analysis, X-Ray Fluorescence Spectroscopy and Transmission Electron Microscopy. Subsequently, the samples were used to fabricate three different series of MWCNTs dispersed into resin epoxy. These series contained from 1% to 12% of the MWCNT sample. Composition ratios were modelled by percolation theory and characterized by different electrochemical techniques including Cyclic Voltammetry and Electrochemical Impedance Spectroscopy. After accurate electrical and electrochemical characterization, it has been demonstrated that the purification method affects the electrochemical behavior of the nanocomposite electrodes; however the optimum MWCNT/epoxy ratio was not modified. Furthermore, morphological experiments corroborated that the electrochemical performance of the electrodes closely depends on the physical properties of the different MWCNTs used. The optimized-sensors (near-percolation sensors) were tested by hydrodynamic amperometry, using ascorbic acid as a model analyte. Interestingly, the sensors containing non-purified MWCNTs exhibited the best electroanalytical response. This fact demonstrates the beneficial effects of metal impurities being present in MWCNTs to enhance the analytical response of MWCNT-based amperometric nanocomposite (bio)sensors.