2026-09-06T16:54:04Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/61202022-11-11T13:15:07Zcom_10259_3844com_10259_5086com_10259_2604col_10259_3845

00925njm 22002777a 4500 dc Heras Vidaurre, Aránzazu author Vulcano, Fabio author Garoz Ruiz, Jesús author Porcelli, Nicola author Terzi, Fabio author Colina Santamaría, Álvaro author Seeber, Renato author Zanardi, Chiara author 2019-02 A flexible electrode system entirely constituted by single-walled carbon nanotubes (SWCNTs) has been proposed as the sensor platform for -nicotinamide adenine dinucleotide (NADH) detection. The performance of the device, in terms of potential at which the electrochemical process takes place, significantly improves by electrochemical functionalization of the carbon-based material with a molecule possessing an o-hydroquinone residue, namely caffeic acid. Both the processes of SWCNT functionalization and NADH detection have been studied by combining electrochemical and spectroelectrochemical experiments, in order to achieve direct evidence of the electrode modification by the organic residues and to study the electrocatalytic activity of the resulting material in respect to functional groups present at the electrode/solution interface. Electrochemical measurements performed at the fixed potential of +0.30 V let us envision the possible use of the device as an amperometric sensor for NADH detection. Spectroelectrochemistry also demonstrates the effectiveness of the device in acting as a voltabsorptometric sensor for the detection of this same analyte by exploiting this different transduction mechanism, potentially less prone to the possible presence of interfering species. 1424-8220 http://hdl.handle.net/10259/6120 10.3390/s19030518 Single-walled carbon nanotubes Caffeic acid Catechol NADH oxidation Electrocatalysis Amperometric sensor Voltabsorptometric sensor Spectroelectrochemistry A Flexible Platform of Electrochemically Functionalized Carbon Nanotubes for NADH Sensors