Effect of Deposition Parameters on Electrochemical Properties of Polypyrrole-Graphene Oxide Films

Prună, A.; Rosas-Laverde, N.M.; Mataix, David Busquets

doi:10.3390/ma13030624

Cited by 19 publications

(8 citation statements)

References 43 publications

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“…PPy-rGO coated carbon fibre has a very different surface structure showing microspheroid particles of PPy grown on the rGO surface. This suggests that the polymerisation of pyrrole occurred on the surface of rGO from the π-π interaction and hydrogen bond between rGO and PPy (Pruna et al, 2020).…”

Section: Characterisationmentioning

confidence: 97%

Reduced Graphene Oxide Carbon Yarn Electrodes for Drug Sensing

et al. 2021

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A modified carbon fibre yarn sensor was developed for the voltammetric determination of paracetamol and its interferents (dopamine and ascorbic acid). Reduced graphene oxide (rGO) was electrochemically deposited onto a carbon fibre yarn. Further modification was achieved using polypyrrole (PPy) coated onto the rGO carbon fibre yarn via electropolymerisation of pyrrole with cyclic voltammetry (CV). The surface of the rGO and PPy-rGO carbon fibre electrodes were characterised using Raman spectroscopy and scanning electron microscopy. The rGO and PPy-rGO carbon fibres had a 3.5-fold and 7-fold larger electrochemical surface area compared to bare carbon fibre (calculated using the Randles-Sevcik equation). Two clearly distinguished oxidation peaks at 0.49 and 0.25 V (vs. Ag/AgCl) were observed at the rGO fibre electrode during the simultaneous detection of paracetamol and dopamine, respectively, by CV. The detection limit (3σ S/N) of the rGO carbon fibre electrode for differential pulse voltammetry (DPV) determination of paracetamol was at 21.1 and 6.0 µM for dopamine. In comparison, the simultaneous determination of paracetamol and dopamine by CV at the PPy-rGO fibre electrode gave oxidation peaks of paracetamol and dopamine at 0.55 and 0.25 V (vs. Ag/AgCl), respectively. The detection limit (3σ S/N) for paracetamol was notably improved to 3.7 µM and maintained at 6.0 µM for dopamine at the PPy-rGO carbon fibre electrode during DPV.

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Section: Characterisationmentioning

confidence: 97%

Reduced Graphene Oxide Carbon Yarn Electrodes for Drug Sensing

et al. 2021

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“…The values for this parameter vary widely between different studies, depending on the chemical constitution of the chosen electrode and the pH values of the medium, but most studies report the application of a potential of approximately −1.0 V (vs. SCE) [56]. The intense cathodic potential aims to promote the reduction of the oxygenated groups of the graphene oxide sheets, making their deposition on the electrode possible [61,[63][64][65][66]. When reduced or partially reduced (depending on the conditions, the electrodeposited graphene oxide will be partially reduced), the sheets become more insoluble and stick to the surface of the conductive material [56,61,64,65].…”

Section: Electrodeposition Of Graphene Oxidementioning

confidence: 99%

“…The intense cathodic potential aims to promote the reduction of the oxygenated groups of the graphene oxide sheets, making their deposition on the electrode possible [61,[63][64][65][66]. When reduced or partially reduced (depending on the conditions, the electrodeposited graphene oxide will be partially reduced), the sheets become more insoluble and stick to the surface of the conductive material [56,61,64,65]. However, it was verified in a recent study by our research group that electrodeposition with cathodic limit potentials of −0.30 V (vs. SCE) is also viable [67].…”

Section: Electrodeposition Of Graphene Oxidementioning

confidence: 99%

Nanocomposite Materials Based on Electrochemically Synthesized Graphene Polymers: Molecular Architecture Strategies for Sensor Applications

et al. 2021

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The use of graphene and its derivatives in the development of electrochemical sensors has been growing in recent decades. Part of this success is due to the excellent characteristics of such materials, such as good electrical and mechanical properties and a large specific surface area. The formation of composites and nanocomposites with these two materials leads to better sensing performance compared to pure graphene and conductive polymers. The increased large specific surface area of the nanocomposites and the synergistic effect between graphene and conducting polymers is responsible for this interesting result. The most widely used methodologies for the synthesis of these materials are still based on chemical routes. However, electrochemical routes have emerged and are gaining space, affording advantages such as low cost and the promising possibility of modulation of the structural characteristics of composites. As a result, application in sensor devices can lead to increased sensitivity and decreased analysis cost. Thus, this review presents the main aspects for the construction of nanomaterials based on graphene oxide and conducting polymers, as well as the recent efforts made to apply this methodology in the development of sensors and biosensors.

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“…The characteristics of the sensing film are strongly dependent upon the deposition technique and process temperature, 24,31 which significantly influences the material's electrochemical parameters. 84,85 As discussed in "Process Optimization for the Deposition of Sensing Film," we utilized a low-temperature sputtering process for depositing Al 2 O 3 sensing film, which is desirable for commercial production of sensors. We obtained the electrochemical parameters for the sensing film using a parametric sweep in order to achieve a close fit with the experimental data.…”

Section: Al 2 O 3 -Gate Isfet Macromodelingmentioning

confidence: 99%

Fabrication, Characterization, and Modeling of an Aluminum Oxide-Gate Ion-Sensitive Field-Effect Transistor-Based pH Sensor

Sinha

Pal

Sharma

et al. 2021

J. Electron. Mater.

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The ion-sensitive field-effect transistor (ISFET) is a popular technology utilized for pH sensing applications. In this work, we have presented the fabrication, characterization, and electrochemical modeling of an aluminum oxide (Al 2 O 3 )-gate ISFET-based pH sensor. The sensor is fabricated using well-established metal–oxide–semiconductor (MOS) unit processes with five steps of photolithography, and the sensing film is patterned using the lift-off process. The Al 2 O 3 sensing film is deposited over the gate area using pulsed-DC magnetron-assisted reactive sputtering technique in order to improve the sensor performance. The material characterization of sensing film has been done using x-ray diffraction, field-emission scanning electron microscopy, energy-dispersive spectroscopy, and x-ray photoelectron spectroscopy techniques. The sensor has been packaged using thick-film technology and encapsulated by a dam-and-fill approach. The packaged device has been tested in various pH buffer solutions, and a sensitivity of nearly 42.1 mV/pH has been achieved. A simulation program with integrated circuit emphasis (SPICE) macromodel of the Al 2 O 3 -gate ISFET is empirically derived from the experimental results, and the extracted electrochemical parameters have been reported. The drift and hysteresis characteristics of the Al 2 O 3 -gate ISFET were also studied, and the obtained drift rates for different pH buffer solutions of 4, 7, and 10 are 0.136 μ A/min, 0.124 μ A/min, and 0.108 μ A/min, respectively. A hysteresis of nearly 5.806 μ A has been obtained. The developed sensor has high sensitivity along with low drift and hysteresis.

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Effect of Deposition Parameters on Electrochemical Properties of Polypyrrole-Graphene Oxide Films

Cited by 19 publications

References 43 publications

Reduced Graphene Oxide Carbon Yarn Electrodes for Drug Sensing

Reduced Graphene Oxide Carbon Yarn Electrodes for Drug Sensing

Nanocomposite Materials Based on Electrochemically Synthesized Graphene Polymers: Molecular Architecture Strategies for Sensor Applications

Fabrication, Characterization, and Modeling of an Aluminum Oxide-Gate Ion-Sensitive Field-Effect Transistor-Based pH Sensor

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