Size dependence of the contact angle of liquid clusters of Bi and Sn supported on SiO2, Al2O3, graphite, diamond and AlN

Murai, Junya; Marukawa, T; Mima, T.; Arai, Shigeo; Sasaki, Katsuhiro; Saka, Hiroyasu

doi:10.1007/s10853-006-7875-y

Cited by 11 publications

(3 citation statements)

References 14 publications

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“…where s is the surface tension of the melt; q denotes the wetting angle; V f is the ber volume fraction; and D denotes the average ber diameter. At the separating temperature of 250 C, substituting s ¼ 0.529 N m À1 , 23 q ¼ 150 degree (tin wetting angle on graphite, approximately), 24 V f ¼ 0.094 (ratio of the bulk density of CFF to the real density of CFF), and D ¼ 1.7 Â 10 À5 m, the P f equals 0.011 MPa. Therefore, the molten tin could ow through the CFF forced by the pressure differential larger than 0.011 MPa, which was consistent with the experimental result.…”

Section: Solvent Rening Processmentioning

confidence: 99%

Purification of metallurgical-grade silicon combining Sn–Si solvent refining with gas pressure filtration

Guo

Wang

et al. 2020

RSC Adv.

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Section: Solvent Rening Processmentioning

confidence: 99%

Purification of metallurgical-grade silicon combining Sn–Si solvent refining with gas pressure filtration

Guo

Wang

et al. 2020

RSC Adv.

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“…However, for particles deposited on a substrate, that might not always be the case. Recently J. Murai et al 35 showed that the contact angle of Sn and Bi particles, supported by a substrate, is size dependent for R < 20 nm. This indicates a more complicated surface area to molten volume ratio.…”

Section: Discussionmentioning

confidence: 99%

Finite size melting of spherical solid–liquid aluminium interfaces

Chang

Johnson

Sakai

et al. 2009

Philosophical Magazine

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We have investigated the melting of nano-sized cone shaped aluminium needles coated with amorphous carbon using transmission electron microscopy. The interface between solid and liquid aluminium was found to have spherical topology. For needles with fixed apex angle, the depressed melting temperature of this spherical interface, with radius R, was found to scale linearly with the inverse radius 1/R. However, by varying the apex angle of the needles we show that the proportionality constant between the depressed melting temperature and the inverse radius changes significantly. This led us to the conclusion that the depressed melting temperature is not controlled solely by the inverse radius 1/R. Instead, we found a direct relation between the depressed melting temperature and the ratio between the solid-liquid interface area and the molten volume.

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“…35 Experimental contact angle measurements are made on micro or millimeter size droplets. Although line tension effects can alter the contact angle of nanoscale droplets, 52 Xu et al 19 and Shenogina et al 31 reported that the nanoscale droplets observed by MD simulation seem to have wettability and contact angles consistent with their macroscopic counterparts. Hence, to compare data across different studies, we decided to use the experimental contact angles to quantify surface wettability.…”

Section: ■ Introductionmentioning

confidence: 99%

Molecular Dynamics Simulations of Water Condensation on Surfaces with Tunable Wettability

et al. 2020

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Water condensation plays a major role in a wide range of industrial applications. Over the past few years, many studies have shown interest in designing surfaces with enhanced water condensation and removal properties. It is well known that heterogeneous nucleation outperforms homogeneous nucleation in the condensation process. Because heterogeneous nucleation initiates on a surface at a small scale, it is highly desirable to characterize water-surface interactions at the molecular level. Molecular dynamics (MD) simulations can provide direct insight into heterogeneous nucleation and advance surface designs. Existing MD simulations of water condensation on surfaces were conducted by tuning the solid-water van der Waals interaction energy as a substitute for modeling surfaces with different wettabilities. However, this approach cannot reflect the real intermolecular interactions between the surface and water molecules. Here, we report MD simulations of water condensation on realistic surfaces of alkanethiol self-assembled monolayers with different head group chemistries. We show that decreasing surface hydrophobicity significantly increases the electrostatic forces between water molecules and the surface, thus increasing the water condensation rate. We observe a strong correlation between our rate of condensation results and the results from other surface characterization metrics, such as the interfacial thermal conductance, contact angle, and the molecular-scale wettability metric of Garde and co-workers. This work provides insight into the water condensation process at the molecular scale on surfaces with tunable wettability.

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Size dependence of the contact angle of liquid clusters of Bi and Sn supported on SiO2, Al2O3, graphite, diamond and AlN

Cited by 11 publications

References 14 publications

Purification of metallurgical-grade silicon combining Sn–Si solvent refining with gas pressure filtration

Purification of metallurgical-grade silicon combining Sn–Si solvent refining with gas pressure filtration

Finite size melting of spherical solid–liquid aluminium interfaces

Molecular Dynamics Simulations of Water Condensation on Surfaces with Tunable Wettability

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