Published in Nature Communications - Selective Ion Sensing in Real Time
Real-time, high resolution, simultaneous measurement of multiple ionic species is challenging with existing chromatographic, spectrophotometric and potentiometric techniques. Potentiometric ion sensors exhibit limitations in both resolution and selectivity. We develop wafer scale graphene transistor technology for overcoming these limitations. Large area graphene is an ideal material for high resolution ion sensitive field effect transistors (ISFETs), while simultaneously enabling facile fabrication as compared to conventional semiconductors. We develop the ISFETs into an array and apply Nikolskii–Eisenman analysis to account for cross-sensitivity and thereby achieve high selectivity. We experimentally demonstrate real-time, simultaneous concentration measurement of different ions in an aquarium with remarkable resolution and accuracy.
2019 William and Rhea Seath Award in Engineering Innovation - $28,000 AWARD
The William and Rhea Seath Awards (WRSAs) have been established to support innovative technological ideas and research in engineering. These Awards recognize outstanding students and professors, who have innovative technological ideas or research results with potential for commercialization.
PUBLISHED ARTICLE IN SENSORS & ACTUATORS: CHEMICAL B
We demonstrate large-area graphene based ion sensitive field effect transistors (ISFETs) with potassium ionophore sensing layers. Graphene ISFETs encapsulated with an ultra-thin hydrophobic layer, parylene C, improves ion sensing performance. We observer detection limits and resolutions orders of magnitude better than state-of-the-art. The sensors exhibit remarkable stability and reproducibility over a five-month period. The sensors have been tested in a variety of specimens, including beverages and blood. The graphene ISFET design can be extended to sensing of other ionic species by substitution of alternative ionophores within the sensing membrane.
UltraSense Invited to LDE North America 2018
UltraSense was invited to the Lebanese Diaspora Energy - North America 2018 in Montreal, an event hosted by the Lebanese Ministry of Foreign Affairs and Emigrants for establishing connections and promoting new possibilities. At the LDE, we talked about our vision for revolutionizing water quality monitoring among highly influential members in the Canadian and Lebanese communities, including Ministers, Ambassadors, Members of Parliaments and CEOs.
RECIPIENT OF THE THE MCGILL ENGINE PRIZE 2018 - $5,000 AWARD
Established in 2017 by the McGill Engineering Innovation and Entrepreneurship hub and the Faculty of Engineering, the McGill EngInE Prize is offered to support a venture competing in the final round in the Innovation-Driven Enterprise track of the McGill Dobson Cup competition.
1ST PLACE WINNER IN THE 2018 MCGILL DOBSON CUP - INNOVATION DRIVEN ENTERPRISE - $10,000 AWARD
The McGill Dobson Centre for Entrepreneurship is the hub of entrepreneurial activity at McGill University. The center hosts the Dobson Cup, McGill's flagship annual startup competition where over $100,000 in cash prizes are awarded to startups across four tracks: Social Enterprise, Health Sciences, Small & Medium Enterprise, and Innovation Driven Enterprise.