Correlations between microstructure and hydrophobicity properties of pulsed laser deposited diamond-like carbon films

Asl, A. Modabber; Kameli, P.; Ranjbar, M.; Salamati, H.; Jannesari, Mohammad

doi:10.1016/j.spmi.2014.11.041

Cited by 50 publications

(12 citation statements)

References 68 publications

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“…However, due to the principle of indeterminism, it is not possible to determine the exact position of an electron at any point in time. For a system containing one electron, the electron density is proportional to its wave's operating square since increasing in the surface-area of the samples due to the high rate of surface roughness, and this is consistent with the results of AFM assays [17,20].…”

Section: Top Viewssupporting

confidence: 83%

“…It can be observed that the DLC films are regular, homogeneous, smooth structures and composed of spherical and non-spherical small and compact particles of different sizes influenced by the laser energy. The average roughness increases with increasing the laser energy [17]. The 300mJ sample has minimum surface roughness magnitudes of root mean square and average particle size.…”

Section: Atomic Force Microscopementioning

confidence: 95%

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Preparation and optimization of heterojunction donor(DLC) – acceptor(SI) as a solar cell by DFT and PLD

Kadhim¹,

Hasan²,

Akraa³

et al. 2021

JOR

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Hybrid bilayer heterojunction (DLC) thin-film P-type as an active donor layer and (Si) thin-film n-type as an acceptor with (Electron Transport Layer ), were fabricated using Qswitching Nd-YAG Pulsed Laser Deposition (PLD) method under vacuum condition 10-3 torr on two electrodes for (AL) Aluminum material is used to construct the hydride bilayer heterojunction photovoltaic solar cell (PVSC). The electrical properties of hybrid heterojunction Al / DLC / SI / AL thin film were studied. The result showed the voltage of open circuit (Vm=0.145V ), a short circuit (Jm=9.3mA/cm2 ), and the fill factor (FF) of (0.4709), with Xenon lamp with an intensity (235mw/cm2 ), the conversion efficiency (η=3.54%) at thickness(75nm). While the theoretical calculations and optimization of the HETEROJUNCTION confirmed the possibility of using it as a successful solar cell, the calculation of the small energy gap and thus the high electrical conductivity, and the determination of the type of charge carriers(p), as well as some electronic properties such as electrostatic potential surfaces and 3-D electron density, hardness, softness and electrophilicity, were clarified.

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Section: Top Viewssupporting

confidence: 83%

Section: Atomic Force Microscopementioning

confidence: 95%

Preparation and optimization of heterojunction donor(DLC) – acceptor(SI) as a solar cell by DFT and PLD

Kadhim¹,

Hasan²,

Akraa³

et al. 2021

JOR

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show abstract

“…Also, the literature indicated that the surface energy of DLC film depends on the number of dangling bonds [21]. A smaller dangling bond usually has lower surface energy.…”

Section: Resultsmentioning

confidence: 99%

Optimization of DLC films on oxynitriding-treated Vanadis 10 tool steel through the various duty cycles of DC-pulsed plasma-enhanced CVD

Chang¹,

Wen²,

Huang³

et al. 2021

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In this study, DLC films were coated on oxynitriding-treated Vanadis 10 tool steel using the DC-pulsed plasma CVD technique. The experimental parameters included different duty cycles (9, 13, 17, and 21 %) with asymmetric bipolar-pulsed voltages of -3 kV, a gas flow of CH4 maintained at 15 sccm, and a deposition time of 90 min. Meanwhile, the properties of DLC films were measured by Raman spectroscopy, Rockwell indentation, wear tests, FT-IR, corrosion tests, water contact angle tests, and four-point probes analysis. The experimental results showed that the optimum properties of DLC films occurred at a duty cycle of 17 %. It had the lowest wear volume loss for loads 2 N and 5 N were 3.49 × 10 −3 mm 3 and 4.08 × 10 −3 mm 3 , respectively. Moreover, the optimal DLC films possessed the lowest corrosion current (Icorr = 7.91 × 10 −5 A cm −2 ) and highest polarization resistance (Rp = 1185.21 Ω cm 2 ) in 3.5 wt.% NaCl solutions. The FT-IR spectrum analysis also found that the characteristic peaks of DLC films were generated at positions of 2852 and 2921 cm −1 , and the water contact angle tests showed that the DLC films had great hydrophobicity (78.33 • ). Consequently, the results confirmed that the duplex surface treatment effectively improved the coating properties of Vanadis 10 tool steel. K e y w o r d s : diamond-like carbon (DLC), oxynitriding, Vanadis 10 tool steel, DC-pulsed plasma-enhanced CVD, wear, corrosion, water contact angle

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“…In their case, the ambient influenced just the thickness of the films, the methane ambient favoring synthesis of 1.5 times thicker layers than in the case of hydrogen ambient. Modabber et al [ 64 ] synthesized DLC films in vacuum, applying a constant number of pulses and changing only the substrate temperature between 100 and 300 °C. They observed that by increasing the substrate temperature, the ratio of sp 2 bonding augmented and the mechanical properties decreased.…”

Section: Discussionmentioning

confidence: 99%

The Role of Ambient Gas and Pressure on the Structuring of Hard Diamond-Like Carbon Films Synthesized by Pulsed Laser Deposition

et al. 2015

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Hard carbon thin films were synthesized on Si (100) and quartz substrates by the Pulsed Laser Deposition (PLD) technique in vacuum or methane ambient to study their suitability for applications requiring high mechanical resistance. The deposited films’ surface morphology was investigated by scanning electron microscopy, crystalline status by X-ray diffraction, packing and density by X-ray reflectivity, chemical bonding by Raman and X-ray photoelectron spectroscopy, adherence by “pull-out” measurements and mechanical properties by nanoindentation tests. Films synthesized in vacuum were a-C DLC type, while films synthesized in methane were categorized as a-C:H. The majority of PLD films consisted of two layers: one low density layer towards the surface and a higher density layer in contact with the substrate. The deposition gas pressure played a crucial role on films thickness, component layers thickness ratio, structure and mechanical properties. The films were smooth, amorphous and composed of a mixture of sp3-sp2 carbon, with sp3 content ranging between 50% and 90%. The thickness and density of the two constituent layers of a film directly determined its mechanical properties.

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Correlations between microstructure and hydrophobicity properties of pulsed laser deposited diamond-like carbon films

Cited by 50 publications

References 68 publications

Preparation and optimization of heterojunction donor(DLC) – acceptor(SI) as a solar cell by DFT and PLD

Preparation and optimization of heterojunction donor(DLC) – acceptor(SI) as a solar cell by DFT and PLD

Optimization of DLC films on oxynitriding-treated Vanadis 10 tool steel through the various duty cycles of DC-pulsed plasma-enhanced CVD

The Role of Ambient Gas and Pressure on the Structuring of Hard Diamond-Like Carbon Films Synthesized by Pulsed Laser Deposition

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