surface roughness – TechConnect Briefs

Effect of Roughness on Wettability of a Surface by Nano-droplets: Correlation With the Slip Length in Nanofluidics

Jabbarzadeh A., The University of Sydney, AU

Surface characteristic govern friction, flow, wettability and many other properties in solid-liquid interfaces. Wettability of surfaces is usually determined by measuring the contact angle of a single droplet put on the surface. Liquid repelling surfaces [...]

Effect of Cutting Parameters on The Surface Roughness of MWCNT Reinforced Epoxy Composite Using End-Milling Process

Harii Krishna Rao G., Ansari M.N.M., Universiti Tenaga Nasional, MY

In this paper, the preparation and casting of sample composite, machining parameters and Scanning electron microscopy (SEM) studies on multi-walled carbon nanotubes (MWCNT) reinforced epoxy composites were discussed. Structurally, MWCNTs consist of multiple layers of [...]

Nanostructural Changes in Surface of Stainless Steel Archwires Combined with Orthodontic Conventional and Self-Ligating Brackets

Choi S., Joo H., Cheong Y., Lee S., Kim S., Park H.K., Park Y.-G., Park H.K., Park Y.-G., Kyung Hee University, KR

It is well-known that the frictional force between the archwire (AW) and the bracket reduces the efficiency of orthodontic treatment. It is affected not only by geometry of self-ligating brackets but also by physical changes [...]

Effect of local curvature on the interaction between hydrophobic surfaces

Hansson P., Swerin A., Thormann E., Claesson P.M., Schoelkopf J., Gane P.A.C., YKI, Institute for surface chemistry, SE

Previous measurements of the attractive interaction between hydrophobic macroscopic surfaces have showed that long-range forces that are considerably stronger than the van der Waals force dominate the interaction Silica nanoparticles have been deposited on substrates [...]

The Bonding Technology for Microchannels with Electrode Patterns on the Glass Substrates

Parng S.H., Yang H.J., Shia T.K., Microsystem Technology Common Laboratory, TW

Objectives: Bonding surface preparation, process conditions, and integrated on-chip metal sheet resistance variation during bonding process were investigated in this work. Methods: We flatten the surface of the etched micro-channels with a fresh solution of [...]

Two-Dimensional Simulation of Tunneling Using Quantum Lattice-Gas Automata

Sakai A., Kamakura Y., Taniguchi K., Osaka University, JP

We present the two-dimensional simulation of quantum tunneling considering the rough surface. It is demonstrated that the electron transmission through the potential barrier is significantly affected by the surface roughness pattern even if the same [...]

Model for Flow Resistance of a Rare Gas Accounting for Surface Roughness

Veijola T., Helsinki University of Technology, FI

The contribution of surface roughness is included in the flow resistance of rare gas flow channels. The statistical properties of the surface are taken into account in the model applying a novel approximation for the [...]

Time Series Modelling of Surface Topography Generated by Ultrasonic Machining Process

Murti V.S.R., Naga Prasada Rao B., Krishna Reddy M., Osmania University, IN

In these studies the surface roughness profiles were modelled and analysed for a better understanding of the mechanism of metal erosion in USM. Different materials were selected for this purpose based on their diverse properties [...]