Cyclic Voltammetry and Electrical Impedance Spectroscopy of Electrodes Modified with PEDOT:PSS-Reduced Graphene Oxide Composite

Ramli, Nurul Izzati; Ismail, Nur Alya Batrisya; Abd-Wahab, Firdaus; Salim, Wan Wardatul Amani Wan

doi:10.5772/intechopen.80715

Cited by 3 publications

(1 citation statement)

References 12 publications

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“…During the testing process, voltage was applied to the WE back and forth for a certain number of cycles, allowing the WE current to be measured. The potential at which the current reaches its peak is known as the peak potential (Ep), which can be used to analyze electrochemical reversibility (Ramli et al, 2018). In this study, CV tests were conducted on electrodes assembled as supercapacitors to analyze the capacitance and conductivity of the samples.…”

Section: Methodsmentioning

confidence: 99%

Optimizing Atmospheric Ion Harvesting Electrodes with Graphene for Clean Energy Generation Based on Capacitive Properties and Energy Storage

Rahiemy,

Irham,

Gumilang

et al. 2024

PhysComm

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The atmosphere is rich in positive ions, rendering it electrically more positive than the Earth's surface. This characteristic presents the atmosphere as a potential source of renewable energy through ion harvesting. This study harnesses the electrical properties by optimizing ion harvesting electrodes using pristine graphene and graphene-Au thin films to generate clean electricity. Research methods included Raman Spectroscopy and Cyclic Voltammetry (CV) to assess the surface characteristics and capacitance of the graphene samples, along with laboratory-scale ion harvesting simulations to evaluate the energy data produced in the ion harvesting process. The samples used in this study were identified as bilayer graphene, as confirmed by Raman Spectroscopy. CV testing yielded capacitance values of 0.40288 F for pristine graphene and 0.44879 F for graphene-Au samples. According to ion harvesting simulations, graphene-Au generated approximately 6.8 times more energy than pristine graphene and five times more energy than copper alone. The respective energy outputs for graphene-Au, pristine graphene, and pure copper were 1.376 mW, 1.157 mW, and 0.374 mW. These results demonstrate that adding a graphene layer to the atmospheric ion-harvesting electrode can optimize the electricity generation process.

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Section: Methodsmentioning

confidence: 99%

Optimizing Atmospheric Ion Harvesting Electrodes with Graphene for Clean Energy Generation Based on Capacitive Properties and Energy Storage

Rahiemy,

Irham,

Gumilang

et al. 2024

PhysComm

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Gold-coated Impedance Biosensors on PCB and PET for Real-Time Monitoring of Cancer Cells

Mansor,

Sedek,

Nordin

et al. 2024

ECS Sens. Plus

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Electrical cell-substrate impedance sensing (ECIS) biosensors are widely used for in vitro cancer cell monitoring as they are label-free, require small sample volumes, and allow real-time monitoring. ECIS electrodes are typically made of pure gold, but the usage of pure gold electrodes is too costly for single-use applications. As an alternative, this work proposes the use of gold coatings on a printed sensor's electrodes. The interdigitated electrode design was used on glass fiber-reinforced epoxy resin for printed circuit boards (PCB), and polyethylene terephthalate (PET). The Cu/Ni electrodes on PCB were electroplated with Au, while the Cu/Ni electrodes on PET were coated with Au using an electroless technique. The physicochemical properties were studied using optical microscopy, scanning electron microscopy, and energy-dispersive spectroscopy. Electrochemical characterization was done using cyclic voltammetry and electrochemical impedance spectroscopy. Biocompatibility assessment and sensor functionality tests were done by culturing SiHa cervical cancer cell lines on these sensors and impedance measurements. The results show that both electroplated and electroless sensors were biocompatible and suitable to monitor SiHa cell growth. Electrochemical migration effect was observed on the sensors where the reaction occurred at 1.2V DC for the PCB sensor and 1.0V DC for the PET sensor.

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α-MnO2 Nanowire Structure Obtained at Low Temperature with Aspects in Environmental Remediation and Sustainable Energy Applications

et al. 2022

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Hydrothermally obtained α-MnO2 nanowire characterizations confirm the tetragonal crystalline structure that is several micrometers long and 20–30 nm in diameter with narrow distributions in their dimensions. The absorption calculated from diffuse reflectance of α-MnO2 occurred in the visible region ranging from 400 to 550 nm. The calculated band gap with Quantum Espresso using HSE approximation is ~2.4 eV for the ferromagnetic case, with a slightly larger gap of 2.7 eV for the antiferromagnetic case, which is blue-shifted as compared to the experimental. The current work also illustrates the transformations that occur in the material under heat treatment during TGA analysis, with the underlying mechanism. Electrochemical studies on graphite supports modified with α-MnO2 compositions revealed the modified electrode with the highest electric double-layer capacitance of 3.444 mF cm−2. The degradation rate of an organic dye—rhodamine B (RhB)—over the compound in an acidic medium was used to examine the catalytic and photocatalytic activities of α-MnO2. The peak shape changes in the time-dependent visible spectra of RhB during the photocatalytic reaction were more complex and progressive. In two hours, RhB degradation reached 97% under sun irradiation and 74% in the dark.

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Cyclic Voltammetry and Electrical Impedance Spectroscopy of Electrodes Modified with PEDOT:PSS-Reduced Graphene Oxide Composite

Cited by 3 publications

References 12 publications

Optimizing Atmospheric Ion Harvesting Electrodes with Graphene for Clean Energy Generation Based on Capacitive Properties and Energy Storage

Optimizing Atmospheric Ion Harvesting Electrodes with Graphene for Clean Energy Generation Based on Capacitive Properties and Energy Storage

Gold-coated Impedance Biosensors on PCB and PET for Real-Time Monitoring of Cancer Cells

α-MnO2 Nanowire Structure Obtained at Low Temperature with Aspects in Environmental Remediation and Sustainable Energy Applications

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