University of British Columbia – TechConnect Briefs

A molecular dynamics study of the causes of defects at dielectric/substrate interface of Ge MOSFETs

Heydari A., Sheikholeslam S.A., Grecu C., Ivanov A., University of British Columbia, CA

The superior electrical properties of Germanium (Ge), such as higher electron and hole mobility, compared to that of other semiconductor materials, have been one of the factors to cause germanium to return to be 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 [...]

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 [...]

Droplet actuation on a digital microfluidic chip using a 5 volt battery

Rezaei Nejad H., University of British Columbia, CA

This paper presents a circuit using a 5-volt DC battery to actuate droplets on a DMF chip. The output of the circuit is a controllable high voltage, high frequency AC signal which can actuate a [...]

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 [...]

Droplet Dispensing from Open to Close Digital Microfluidics

Rezaei Nejad H., University of British Columbia, CA

There are two types of DMF platforms: open and closed systems. Each platform has its own advantages. For instance, it is easier to access the droplet in the open systems; whereas, the closed system limits [...]

Introducing a Digital Micropump for Driving a Droplet in a Microfluidic Channel

Rezaei Nejad H., University of British Columbia, CA

This paper presents a novel pumping technique which is compatible with both digital and continuous microfluidic platforms. In essence, a target droplet (referred to as the pumped droplet) is pumped by actuating the secondary droplet [...]

Experimental investigation of the possibility of transporting a droplet over a hydrophilic spot in digital microfluidics

Samiei E., Hoorfar M., University of British Columbia, CA

This paper studies the transport of a water droplet over a hydrophilic spot (representing the sensing surface of a biosensor) created on the top plate of a digital microfluidic chip. For this purpose, a closed [...]

Electrospun Nanofibrous Scaffold for Controll Drug Delivery

Leung V., Hartwell R., Faure E., Yang H., Ghahary A., Ko F., University of British Columbia, CA

This study aims to design methods for controlling drug release from polymer nanofibres, and use these methods as a guide for designing nanofibre wound dressings with customizable release profile for a range of drugs. The [...]

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 [...]