Najjaran H. – TechConnect Briefs

Fabrication and Testing of a Miniaturised Water Quality Monitoring pH and Conductivity Sensors

Banna M.H., Najjaran H., Sadiq R., Rodriguez M.J., Imran S.A., Hoorfar M., University of British Columbia, CA

Development of cost-effective, durable and sensitive on-line water quality monitoring sensors that can be installed across the water distribution network has attracted attentions to increase the frequency of monitoring and hence reduce the risk of [...]

Fabrication and Testing of a Miniaturised Water Quality Monitoring pH and Conductivity Sensors

Banna M.H., Najjaran H., Sadiq R., Rodriguez M.J., Imran S.A., Hoorfar M., University of British Columbia, CA

Development of cost-effective, durable and sensitive on-line water quality monitoring sensors that can be installed across the water distribution network has attracted attentions to increase the frequency of monitoring and hence reduce the risk of [...]

Electrowetting on screen printed paper based substrate

Yafia M., Najjaran H., University of British Columbia, CA

In this work, electrowetting on dielectric (EWOD) is performed on a paper based substrate. Electrode patterns are fabricated on a paper substrate using screen printing. Conventional photolithography fabrication techniques are replaced by screen printing conductive [...]

Multiplexed Localization in Bi-Layer Digital Microfluidic Systems

Abolhasani M., Devlin K.D., Najjaran H., Hoorfar M., Holzman J.F., The University of British Columbia Okanagan, CA

This paper reports a novel system-level design for digital microfluidic (DMF) devices. A DMF multiplexer structure based on a cross-referencing architecture is presented. The design makes use of bi-polar voltage activation and threshold effects to [...]

Biomolecular Adsorption Phenomena in Electrowetting-Based Digital Microfluidic Devices

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

Digital microfluidic lab-on-a-chip technology has been a new trend in miniaturizing biomedical platforms. However, nonspecific adsorption of these biomolecules has proven to be one the greatest sources of uncertainties for these biofluidic chips. Unwanted adsorption [...]

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 [...]

Numerical Modeling of Microdrop Motion on Digital Microfluidic Multiplexer

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

This paper introduces a computationally efficient numerical modeling approach for microdroplet motion on an innovative Digital Microfluidic Multiplexer structure which enables the pilot synthesis and study of nanoparticles. This structure offers an enhanced level of [...]