Low voltage electrodeposition of diamond like carbon (DLC)

Sreejith, K.; Nuwad, J.; Pillai, C.G.S.

doi:10.1016/j.apsusc.2004.11.091

Cited by 31 publications

(24 citation statements)

References 24 publications

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“…Since the discovery of liquidphase synthesis in 1991 [13], it has received much interest. Some progress has been achieved on the electrodeposition of DLC films [14][15][16]. Kiyota et al reported the electron field emission from DLC films deposited on Si substrate by electrolysis of methanol liquid, and a very low threshold field of 1.2 V/mm was obtained to generate current density of 1 mA/cm 2 [17].…”

Section: Introductionmentioning

confidence: 98%

Effect of deposition voltage on the field emission properties of electrodeposited diamond-like carbon films

Liu

Zhou

et al. 2009

Applied Surface Science

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Section: Introductionmentioning

confidence: 98%

Effect of deposition voltage on the field emission properties of electrodeposited diamond-like carbon films

Liu

Zhou

et al. 2009

Applied Surface Science

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“…11 The mechanism presented in this work is based on empirical observations (presence of trans-polyacetylene), and on the formation of precursor ions and gas products in the solution, as reported by some authors. 11,14,22,24 Using ethanol as the electrolyte there is a strong possibility that ethanol molecules are polarized under an applied potential, as can be demonstrated by Equation 1:…”

Section: Resultsmentioning

confidence: 97%

Electro-Deposition of Carbon Structures at Mid Voltage and Room Temperature Using Ethanol/Aqueous Solutions

Tsukada¹,

Barbosa²,

Silva³

et al. 2012

J. Electrochem. Soc.

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Direct syntheses of carbon structures including nanodiamond, microdiamond and diamond-like carbon (DLC) on silicon wafers by liquid phase electro-deposition are presented. The solution (ethanol/water) was employed as electrolyte at different concentration levels. Assays were carried out maintaining constant the electric potential between the silicon electrodes in the range of (80−300 V) at current density of approximately 2.0 mA/cm 2 . Scanning electron microscopy showed that non-uniform, smooth and heterogeneous structures were produced. The structural composition was evaluated by micro-Raman spectroscopy. A mechanism for the formation of sp 3 and sp 2 hybridizations is proposed.Diamond and carbon related materials have been considered promising materials for many industrial applications due to their superb physicochemical properties such as high hardness, low friction coefficient, wear resistance, high thermal conductivity, chemical inertness, and good biocompatibility, among others. 1-4 Diamond and carbon related materials have been produced by a variety of chemical vapor deposition techniques (CVD), 1, 2 as well as the low temperature deposition process, such as the electro-deposition. 3,4 The first attempt to grow carbon films by electro-deposition technique was reported by Namba 5 and ever since that, others groups have used such technique for carbon films preparation. 3-14 Sreejith et al. obtained diamond-like carbon (DLC) at low voltages (80-300 V) and 1 mm interelectrode separation, which gives electric fields of 0.08-0.3 Vm −1 . 11 Graphite and silicon were employed as electrodes (anode/cathode) and ethanol as electrolyte. It is still not clear whether the carbon film deposited had as its source the electrolyte, or the graphite electrode itself or both.In this work we report the results of our investigation on electrodeposition of carbon films containing nanodiamond and diamond inclusions, diamond-like carbon (DLC) and graphitic phases on silicon wafers, which were submerged in an aqueous ethanol solution. All assays were run at room temperature, without heating or cooling and with a low energy consumption. Raman spectra and scanning electron microscopy images are presented and discussed, and a mechanism for the formation of the sp 3 and sp 2 hybridization/bonding is proposed. ExperimentalMirror polished pieces of n-type silicon (100) with resistivity of about 1 .cm and dimensions of 30 × 10 × 0.3 mm 3 were used as electrodes (anode and cathode). Prior to deposition process, the silicon substrates were cleaned by ultrasonic treatment in acetone for 30 min. The electrolyte was a solution constituted of analytical grade Merck R ethanol and deionized water. The solution was not agitated during the deposition process. The distance between the electrodes was fixed at 25 mm, the same value for all experiments. The voltage applied between the electrodes was maintained constant during each experiment and ranged from 80 V to 300 V. Heating or cooling was never applied, so the temperature of the system had a slig...

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“…23 Meanwhile, they use lower voltages (80-300 V) by decreasing the electrode separation and so increasing the solution conductance to deposit DLC films, allowing larger current densities to flow. In our work, addition of KNO 3 to electrolyte can improve the solution conductance and account for as large as 333 mA/cm 2 current density to flow.…”

Section: Resultsmentioning

confidence: 99%

Electrodeposition of Diamond-like Carbon (DLC) Films on Mg by Plasma Electrolysis

et al. 2013

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Diamond-like carbon (DLC) films were deposited on Mg substrate in CH 3 OH and KNO 3 solution by the liquid-phase electrodeposition technique at ambient pressure and temperature. The applied voltage between the electrodes was low (130 V) due to the use of conductive inorganic liquids. The surface morphology was examined by Scanning Electron Microscopy (SEM). Corrosion performance of the films was investigated by potentiodynamic polararization tests and electrochemical impedance spectroscopy (EIS) in 3.5% NaCl solution. The structure of the films was characterized by X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. Raman spectroscopy analysis of the films revealed two broad bands at approximately 1369.5 and 1554.7 cm bonding, which is also in accordance with the results of XPS spectra. SEM showed that DLC film was uniform, homogeneous but rough. Potentiodynamic polarization curve and EIS indicated the corrosion resistance of the Mg substrate was markedly improved by DLC films. A mechanism for the formation of sp 3 and sp 2 hybridizations is proposed.

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Low voltage electrodeposition of diamond like carbon (DLC)

Cited by 31 publications

References 24 publications

Effect of deposition voltage on the field emission properties of electrodeposited diamond-like carbon films

Effect of deposition voltage on the field emission properties of electrodeposited diamond-like carbon films

Electro-Deposition of Carbon Structures at Mid Voltage and Room Temperature Using Ethanol/Aqueous Solutions

Electrodeposition of Diamond-like Carbon (DLC) Films on Mg by Plasma Electrolysis

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