Microscopic droplets are ubiquitous in the air, both indoors and outdoors. They are composed of chemically complex mixtures including water and co-dissolved salts, surfactants, and biological material. When we inhale these droplets, they grow in our lungs and may become vectors for communicable diseases, including viruses. As droplets persist in the air, they can act as seeds to grow cloud droplets, or nucleation points for ice crystallization of cloud particles. Their impacts on air quality in turn affect human and ecosystem health, climate, and weather. Although these impacts are large, there is a lack of rigorous treatment and quantification of their properties, which in turn leads to high uncertainty in global models. In addition to these environmentally relevant research areas, there are also numerous desirable applications harnessing the advantages of aerosols in additive manufacturing, sprays, drug-delivery, and nanoparticle synthesis.
Dr. Chelmo’s research aims to transform our fundamental understanding of aerosol surfaces and develop novel theoretical characterization methods and instrumentation. She previously developed aerosol surface tension models and measurements (PhD; University of Minnesota) and new measurements of individual levitated micro-droplets (Postdoc; Carnegie Mellon University). Here at UND, she leads the Aerosol Engineering Laboratory, where the Chelmo group uses laboratory experimental techniques and thermodynamic models to explore fascinating physicochemical processes of droplets in real-time.
Professor Chelmo started the Aerosol Engineering Laboratory in Fall 2019 after joining the mechanical engineering department at the University of North Dakota.
Boyer, H. C.; Gorkowski, K.; Sullivan, R. C., pH measurements of individual levitated microdroplets
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Boyer, H. C.; Dutcher, C.S., Atmospheric aqueous aerosol surface tension: isotherm-based modeling
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Boyer, H. C.;Bzdek, B.; Reid, J. P.; Dutcher, C. S., Statistical thermodynamic model for surface
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Boyer, H. C.; Dutcher, C. S., Statistical thermodynamic model for surface tension of aqueous organic
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Boyer, H. C.;Wexler, A.; Dutcher, C. S., Parameter interpretation and reduction for a unied statis-
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CEM Dean's Research Award, 2019-2021
Invitee to Atmospheric Chemistry Colloquium for Emerging Senior Scientists (ACCESS XIV), 2017
NSF Graduate Research Fellowship, 2014-2017
Dreyfus Postdoctoral Fellow, Center for Atmospheric Particle Studies, Carnegie Mellon University, 2017-2019
Ph.D., Mechanical Engineering, University of Minnesota, 2012-2017
B.A. Physics, Honors, Macalester College, 2004-2008