| People | Locations | Statistics |
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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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Palomäki, Tommi
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2021What Determines the Electrochemical Properties of Nitrogenated Amorphous Carbon Thin Films?citations
- 2019Integrating Carbon Nanomaterials with Metals for Bio-sensing Applicationscitations
- 2019Effect of Power Density on the Electrochemical Properties of Undoped Amorphous Carbon (a-C) Thin Filmscitations
- 2019Electrochemistry of Amorphous Carbon Based Materials - Development of an electrochemical sensor for the detection of dopamine ; Amorfisten hiilimateriaalien sähkökemialliset ominaisuudetcitations
- 2018Unmodified and multi-walled carbon nanotube modified tetrahedral amorphous carbon (ta-C) films as in vivo sensor materials for sensitive and selective detection of dopaminecitations
- 2017Partially Reduced Graphene Oxide Modified Tetrahedral Amorphous Carbon Thin-Film Electrodes as a Platform for Nanomolar Detection of Dopaminecitations
- 2017Electron transport determines the electrochemical properties of tetrahedral amorphous carbon (ta-C) thins filmscitations
- 2016Characterization and Electrochemical Properties of Oxygenated Amorphous Carbon (a-C) Filmscitations
- 2015Electrochemical reactions of catechol, methylcatechol and dopamine at tetrahedral amorphous carbon (ta-C) thin film electrodescitations
- 2014New electrochemically improved tetrahedral amorphous carbon films for biological applicationscitations
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article
Effect of Power Density on the Electrochemical Properties of Undoped Amorphous Carbon (a-C) Thin Films
Abstract
<p>Undoped a-C thin films were deposited with varying power density from 10 to 25 W/cm<sup>2</sup> using unbalanced closed-field magnetron sputtering (CFUBMS). The effect of power density on the physical and electrochemical properties was investigated by experimental characterization methods and atomistic simulations. XPS indicated that the films were composed mostly of sp<sup>2</sup>-bonded carbon (55–58 at.%) with a small amount of oxygen (8–9 at.%) in the surface region. The films appeared completely amorphous in XRD. The I<sub>D</sub>/I<sub>G</sub> ratio obtained by Raman spectroscopy indicated an increase from 1.76 to 2.34 with power density. The experimental and simulated data suggested a possible ordering and/or clustering of the sp<sup>2</sup> phase with power density as the cause of the improved electrical properties of the a-C films. The electrochemical properties of a-C were between those of glassy carbon and tetrahedral amorphous carbon with potential windows ranging from 2.77 to 2.93 V and double-layer capacitance values around 0.90 μF cm<sup>−2</sup>. Electron transfer for Ru(NH<sub>3</sub>)<sub>6</sub> <sup>3+/2+</sup> and FcMeOH<sup>+1/0</sup> was reversible whereas that for IrCl<sub>6</sub> <sup>2−/3−</sup> was quasi-reversible. Peak potential separation of dopamine and oxidation potential of ascorbic acid decreased with power density, correlating with the structural and electrical changes of the films. The a-C thin films deposited by CFUBMS are inherently conductive and their physical properties can be adjusted by varying the deposition parameters to a wide range of electrochemical applications.</p>