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Preparation and electrochemical performance of PEDOT – AuNPs nanocomposite layers for the selective detection of neurotransmitters
Poly (3, 4-ethylenedioxythiophene) (PEDOT) is one of the most widely used conducting polymers, due to its good electrochemical stability and high conductivity [1]. It was synthesized in 1988 by Bayer AG, Leverkusen [1]. Recently attention was focused on studying composite materials based on conducting polymers on which different metals were deposited. Thus, due to the presence of metal particles, the properties of nanocomposites like conductivity and catalytic activities are significantly improved. The nanocomposite materials are lightweight, have large surface area, the potential for non-enzymatic detection, low cost, easy processing and scalable production [1]. Catecholamines are a class of neurotransmitters, and their detection in the human body has been of interest to neuroscientists. They include dopamine, serotonin, adrenalin and they play important roles in various biological, pharmacological, and physical processes. Among the different analysis techniques electrochemical methods have received much interest because of their simplicity; selectivity, low costs, less time-consuming and as they can be applied to a real-time in situ determination [2]. Electrochemical analysis on unmodified electrodes like glassy carbon, or gold electrodes, used in our work, has limitations because of overlapping voltammetric peaks and high concentrations of ascorbic acid [3]. The overall objective of this work was to develop a new generation of modified electrodes, PEDOT/Au nanoparticles, which give distinguish oxidation peaks of analytes. The sensitivity for dopamine detection increased threefold on PEDOT/Au nanoparticles, from 0.13+/-0.01/ microA/microM to 0.3+/-0.03/ microA/microM. The second linear region found in nanomolar range shows a higher slope 0.04+/-0.0002/ microA/microM corresponding to a higher sensitivity. The higher sensitivity for serotonin detection (0.4+/-0.04/ microA/microM) was obtained for PEDOT/Au nanoparticles layer also. Comparing with the data for PEDOT layer (0.13+/-0.004/ microA/microM) the values ...
Preparation and electrochemical performance of PEDOT – AuNPs nanocomposite layers for the selective detection of neurotransmitters
Poly (3, 4-ethylenedioxythiophene) (PEDOT) is one of the most widely used conducting polymers, due to its good electrochemical stability and high conductivity [1]. It was synthesized in 1988 by Bayer AG, Leverkusen [1]. Recently attention was focused on studying composite materials based on conducting polymers on which different metals were deposited. Thus, due to the presence of metal particles, the properties of nanocomposites like conductivity and catalytic activities are significantly improved. The nanocomposite materials are lightweight, have large surface area, the potential for non-enzymatic detection, low cost, easy processing and scalable production [1]. Catecholamines are a class of neurotransmitters, and their detection in the human body has been of interest to neuroscientists. They include dopamine, serotonin, adrenalin and they play important roles in various biological, pharmacological, and physical processes. Among the different analysis techniques electrochemical methods have received much interest because of their simplicity; selectivity, low costs, less time-consuming and as they can be applied to a real-time in situ determination [2]. Electrochemical analysis on unmodified electrodes like glassy carbon, or gold electrodes, used in our work, has limitations because of overlapping voltammetric peaks and high concentrations of ascorbic acid [3]. The overall objective of this work was to develop a new generation of modified electrodes, PEDOT/Au nanoparticles, which give distinguish oxidation peaks of analytes. The sensitivity for dopamine detection increased threefold on PEDOT/Au nanoparticles, from 0.13+/-0.01/ microA/microM to 0.3+/-0.03/ microA/microM. The second linear region found in nanomolar range shows a higher slope 0.04+/-0.0002/ microA/microM corresponding to a higher sensitivity. The higher sensitivity for serotonin detection (0.4+/-0.04/ microA/microM) was obtained for PEDOT/Au nanoparticles layer also. Comparing with the data for PEDOT layer (0.13+/-0.004/ microA/microM) the values ...
Preparation and electrochemical performance of PEDOT – AuNPs nanocomposite layers for the selective detection of neurotransmitters
Gruia, Violeta-Tincuta (author) / Bund, Andreas / Ritter, Uwe / Carac, Geta
2016-07-14
Theses
Electronic Resource
English
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