This technology relates to the enlargement by water condensation in a laminar flow of airborne particles with diameters of the order of a few nanometers to hundreds of nanometers to form droplets with diameters of the order of several micrometers. The technology presents several advanced designs, including the use of double-stage condensers. It has application to measuring the number concentration of particles suspended in air or other gas, to collecting these particles, or to focusing these particles.
This invention was made with government support under the following Grant Nos: U.S. Dept. of Energy Grant #DE-SC0004643; and National Institutes of Health Grant #ES014997. The government has certain rights in the invention.