Welcome to our lab website! We are part of the department of Mechanical Engineering at the University of Minnesota in Minneapolis, MN. The mechanical engineering department at UMN is typically ranked within the top ten mechanical engineering departments in the nation, as per the National Research Council, and the University of Minnesota is uniquely the only Big Ten University within a major metropolitan area (there more than 3.8 million people in the Twin Cities combined statistical area). Our particle laboratory focus is broadly on the physics and chemistry governing the behavior of small particles (nanoparticles), molecular clusters, and ions in the gas phase (i.e. in aerosols). The links above will lead you to a description of the work we are doing, brief biographies of the faculty, staff, post-doctoral associates, and students in our group, publication lists, and news. In addition, we are (slowly) building up a variety of educational resources, including data inversion codes for aerosol measurements, Brownian Dynamics algorithms to simulate particle motion, links to particle/ion collision cross section calculators, as well as info on where to purchase hard-to-find but essential equipment in aerosol measurement.