Contact Angle Analysis on Glass Based Surface

Aziz, M. H. A.; Sauli, Zaliman; Retnasamy, Vithyacharan; Norhaimi, Wan Mokhdzani Wan; Taniselass, Steven; Kamarudin, Hussin

doi:10.4028/www.scientific.net/amm.680.93

Cited by 4 publications

(4 citation statements)

References 6 publications

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“…72 Three different possible explanations exist for the Table II. BCs for the cocurrent flow simulations with analytical inlet velocity 73 and a contact angle according to 52,74 Inlet Walls Outlet…”

Section: Topmentioning

confidence: 99%

Modeling of Pore-Scale Capillary-Dominated Flow and Bubble Detachment in PEM Water Electrolyzer Anodes Using the Volume of Fluid Method

Schmidt,

Niblett,

Niasar

et al. 2024

J. Electrochem. Soc.

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Fluid dynamics models complement expensive experiments with limited measurement accuracy that investigate the mass transport in PEM water electrolysis. Here, a first-principle microscale model for oxygen transport is successfully validated that accounts for (1) uncertain transport processes in catalyst layers, (2) numerically challenging capillary-dominated two-phase flow and (3) bubble detachments in channels. We developed algorithms for the stochastic generation of geometries and for the coupling of flow and transport processes. The flow model is based on the volume of fluid method and reproduces experimentally measured pressure drops and bubble velocities within minichannels with a 30% and 20% accuracy, respectively, provided that the capillary number is above 2.1 × 10−7. At lower capillary numbers, excessive spurious currents occur. Correspondingly, two-phase flow simulations within the porous transport layers are stable at current densities above 0.5 A cm−2 and match operando gas saturation measurements within a 20% margin at relevant locations. The simulated bubble detachments occur at pore throats that agree with porosimetry and microfluidic experiments. The presented model allows explaining and optimizing mass transport processes in channels and porous transport layers. These were found to be negligibly sensitive to transport resistances within the catalyst layer, providing information on boundary conditions for future catalyst layer models.

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Section: Topmentioning

confidence: 99%

Modeling of Pore-Scale Capillary-Dominated Flow and Bubble Detachment in PEM Water Electrolyzer Anodes Using the Volume of Fluid Method

Schmidt,

Niblett,

Niasar

et al. 2024

J. Electrochem. Soc.

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“…Spin coating is a widely used method in terms of solution-processed materials, but the hydrophobicity of substrates remains a challenging issue. The contact angle of water on glass increases after deposition of ITO to ∼40° reported by several works. − This phenomenon affects the interfacial properties such as contact angle, adhesion, and surface uniformity between the layers. , The major solution to this problem is plasma treatment. Plasma treatment functionalizes the ITO’s surface by oxygen bonding on the surface.…”

Section: Introductionmentioning

confidence: 98%

“…66−68 This phenomenon affects the interfacial properties such as contact angle, adhesion, and surface uniformity between the layers. 69,70 The major solution to this problem is plasma treatment. Plasma treatment functionalizes the ITO's surface by oxygen bonding on the surface.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Graphene Oxide-Based Resistive Switching Memory by the Spray Pyrolysis Technique for Neuromorphic Computing

Moazzeni

Madvar

Hamedi

et al. 2023

ACS Appl. Nano Mater.

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Recently, resistive switching memory (RRAM) has been attractive for implementing electronic synapses in neural networks and high-density memory technology. In this paper, we report a different technique for fabricating an Al/GO/ITO RRAM device with multilevel storage capability. In this work, graphene oxide (GO) thin films have been deposited by the spray pyrolysis technique (SPT) using GO powder synthesized by chemical oxidation of graphite flakes via the modified Hummers method. The fabricated RRAM shows good switching performance between On and Off states with the best memory window of 20 and presents reliable retention characteristics of 10 4 s and 50 reproducible write−read DC cycles without degradation. The multilevel feature points out five stable multiresistant states obtained with the variation of the compliance current (I cc ) and reset voltage amplitude. The successful longterm potentiation and depression with 10 ms pulse operation allows to apply this memory in neuromorphic computing applications in addition to 11 gradual conductance levels achieved by continuous set and reset cycles. A comparison of the efficiency of SPT with that of the typical spin coating method showed a notable (87%) yield achieved by SPT. The combination of the multilevel capacity of fabricated RRAMs with SPT was exploited to suggest that GO-based RRAMs have the potential to be used as multibit GO memristors and electronic synapse devices for emerging neuromorphic chips. In addition, this work paves the way for the fabrication of solution-based, low-cost, simple and large-scale GO memristors for future electronics.

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“…As the deposition proceeds, drainage removes part of the solvents and increases the interaction surface among the deposited polymer, the substrate and the particles of the material being deposited. The used substrate (soda-lime glass) is hydrophilic (wetting angle about 15° [20]), with a larger surface area generated by the structure formed by the polymer, in conjunction with the solution viscosity and the interaction between solution and substrate, which also becomes higher. The overall result is a better adhesion and greater possibility of branching and growth of the deposited material.…”

Section: Introductionmentioning

confidence: 99%

On the Use of Surfactant for Precursor Solution Processing and Influence on the Properties of Tin Dioxide Thin Films

Lp¹,

Lfk²,

Jvm³

et al. 2021

Preprint

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Tin dioxide (SnO2) thin films have several sorts of applications, including as gas sensors and in photocatalysis, where the surface area plays a relevant role. The use of the Triton X-100 non-ionic surfactant in the precursor solution processing has revealed as a fundamental aid to increase adhesion of the SnO2 film on the substrate. Moreover, the surfactant presence leads to a significant increase in the surface area of deposited thin films, and the roughness (rms) increases from 57.6 nm to 275 nm. The influence can also be observed in the XRD profiles, with a higher degree of crystallinity for Triton deposited films. It also increases the defect density and the electron scattering, leading to rather resistive films which are thermally excited only above room temperature. The activation energy for the defect ionization is rather high, 800 meV, but the thermal excitation takes place at a lower temperature range, compared to films prepared without Triton in the solution processing. The performance on photocatalysis is improved for films prepared with Triton X-100, since most of the methylene blue dye is degraded in the first 90 minutes when interacting with the sample.

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Contact Angle Analysis on Glass Based Surface

Cited by 4 publications

References 6 publications

Modeling of Pore-Scale Capillary-Dominated Flow and Bubble Detachment in PEM Water Electrolyzer Anodes Using the Volume of Fluid Method

Modeling of Pore-Scale Capillary-Dominated Flow and Bubble Detachment in PEM Water Electrolyzer Anodes Using the Volume of Fluid Method

Fabrication of Graphene Oxide-Based Resistive Switching Memory by the Spray Pyrolysis Technique for Neuromorphic Computing

On the Use of Surfactant for Precursor Solution Processing and Influence on the Properties of Tin Dioxide Thin Films

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