contact angle – TechConnect Briefs

Effect of pore size and Porosity on Contact angle of Ceramic membrane for Oil-in-water Emulsion Separation

Aisueni F., Gobina E., Prabhu R., Robert Gordon University, UK

The main objective of this work is to study the effect of pore size and porosity on contact angle of ceramic membrane for Oil-in-water emulsion separation. This would include using N2 adsorption/desorption to validate pore [...]

Wettable Slippery Surfaces. Self-cleaning Effect and Mechanism

Law K-Y, Research and Innovative Solutions, US

The phenomenon of self-cleaning displayed by the Lotus leaf and many other plant and insect surfaces has attracted tremendous attention recently. Self-cleaning surface is usually superhydrophobic and non-wettable, and is characterized by a very large [...]

Predicting Contact Angles for Regular and Irregular Surfaces

Krishnan K., Loth E., University of Virginia, US

We attempted new models for advancing and receding contact angles for both regular and irregular surfaces. While many models have been suggested for regular surfaces, comparison with experimental data shows the presence of secondary effect. [...]

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 [...]

The Retention of Silica Nanoparticles at Oil/Water Interface

Metin C.O., Nguyen Q.P., The University of Texas at Austin, US

We investigate the retention of silica nanoparticles at water/crude oil interface. Silica nanoparticles with three different surfaces (unmodified, surface modified with anionic (sulfonate), or nonionic (PEG) surfactant) are used. Interfacial tension (IFT) measurements provide us [...]

The Retention of Silica Nanoparticles at Oil/Water Interface

Metin C.O., Nguyen Q.P., The University of Texas at Austin, US

We investigate the retention of silica nanoparticles at water/crude oil interface. Silica nanoparticles with three different surfaces (unmodified, surface modified with anionic (sulfonate), or nonionic (PEG) surfactant) are used. Interfacial tension (IFT) measurements provide us [...]

The Effect of Surface Treatment on The Line Formation of Inkjet-Printed Silver Nanoparticles

Moon S.J., Moon Y.J., Kang H.S., Kang K.T., Kang H.S., Kang K.T., Lee S-H., Moon S.J., Moon Y.J., Hwang J.Y., Korea Institute of Industrial Technology(KITECH), KR

Printing technologies have emerged as a promising technique to realize low-cost integrated circuits. Among several printing techniques, drop-on-demand inkjet printing is an attractive tool for low-cost electronics fabrication. Inkjet printing can generate patterns of metal, [...]

Octadecylphosphonic acid Langmuir-Blodgett films and their modification by hyperthermal hydrogen projectile

Dey R., The university of waterloo, CA

We report on surface modification with hyperthermal hydrogen induced cross-linking (HHIC) technology on uniform and well-ordered octadecylphosphonic acid (OPA) Langmuir-Blodgett (LB) films on several surfaces, and on surface characterizations of its properties. The hyperthermal hydrogen [...]

Determination of droplet shape in digital microfluidic systems using two-dimensional flow analysis

Ahmadi A., Najjaran H., Holzman J.F., Hoorfar M., University of British Columbia Okanagan, CA

A two-dimensional model for fluid flow in a digital microfluidic system is introduced, and the results are compared to experimental data. Resistive flow effects based upon contact line forces, filler effects and shear forces are [...]

Molecular Simulation of the Nanoscale Water Confined between an Atomic Force Microscope Tip and a Surface

Choi H.J., Kim J-Y, Hong S.D., Ha M.Y., Jang J., Pusan National University, KR

Under ambient humidity, water condenses as a meniscus between an atomic force microscope (AFM) tip and a surface, giving rise to a strong capillary force on the tip. We performed a molecular dynamics simulation of [...]