Welcome to the ACPA Seminar Series, a monthly webinar series including various topics of interest related to advancing the Chemical Profession in Alberta. For the next seminar in this series, we are happy to introduce Peter Kusalik, Professor of Chemistry at The University of Calgary to speak on 'Nanobubbles: What are they, Why are they important, and Why are they stable?' on November 15, 2022.  Each seminar will be eligible for 1 PDC credit.


6:45 - 6:59 PM MT - Networking

7:00 - 8:00 PM MT - Presentation and Q&A

Nanobubbles: What are they, Why are they important, and Why are they stable?

Nanobubbles, sometimes known as ultrafine bubbles, are gas-filled bubbles in water with diameters typically in the ~100 nm range. These nanoscale gaseous domains can exist in bulk aqueous solution and only recently have come under focused scientific investigation. While several features of nanobubbles are consistently reported, most notably their unexpected stability in water over long periods of time (e.g. weeks or months), there remains considerable uncertainty and debate regarding the nature and properties of bulk nanobubbles (e.g. the origin of their unexpected stability). As a consequence of their very small size, nanobubbles have very large surface area to volume ratios and negligible buoyancy, and can also have significant impact on the solution’s properties. It is perhaps the fact that they can effectively enhance the total amount of gas present in water by essentially removing of the limitation of gas solubility, as for example with oxygen, that has apparently aroused the greatest interest in their potential for a wide range of real-world applications, from medical imaging and drug delivery to water treatment. This presentation will examine bulk nanobubbles from several different perspectives. It will briefly describe what nanobubbles are and then consider some of their key properties. It will examine some of the current and potential applications for nanobubbles and will briefly review some of the methods used for their generation. Some of controversy surrounding nanobubbles will be described, as will the impact on their behaviour from the presence of various dissolved species in solution, with key issues and questions around nanobubble stability and mobility being a particular focus. I will also describe some simple physical models that have been used to explain both the stability and mobility of nanobubbles. The intent of this presentation will be to provide an overview of nanobubbles, where we will explore each of these topics at a level appropriate for a general chemical audience.

Speaker Bio

Peter Kusalik, Professor of Chemistry at The University of Calgary

Peter Kusalik earned his M.Sc. and Ph.D. degrees in Chemistry at the University of British Columbia. After completing a postdoctoral fellowship at the Australian National University, he moved to the Department of Chemistry at Dalhousie University. While at Dalhousie he received tenure and was promoted to the rank of Professor. In 2005 he moved to the University of Calgary, where he has served as Head of the Department of Chemistry and as Associate Dean in the Faculty of Science. Much of Dr. Kusalik's research has centered on utilizing molecular simulations to provide insights into the behaviour in liquids and solids at the microscopic level. Aqueous systems have been a primary focus throughout his research, where explorations of crystal nucleation and growth have been a focal point for much of his recent work. Another area of recent focus is experimental investigations of the generation and characterization of aqueous nanobubbles. He has published 122 research papers, many in top venues, including PNAS, J. Am. Chem. Soc., Phys. Rev. Lett., Science and Science Adv., has received more than 8300 citations, and has an h-index of 50. In 2017, he was awarded a Wenner-Gren Fellowship, and received the Noranda Lecture Award (from the Canadian Society for Chemistry) in 2004. He has been a Keynote and Invited speaker at numerous international conferences. Dr. Kusalik has supervised 26 graduate students (including 2 Vanier scholars), 27 undergraduates, and 10 postdoctoral fellows.

Registration Information

Cost:  FREE

Registration Deadline: November 13, 2022

>> Register today!

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