UV-photoemission based nanosensors
Measurements
We have developed a method for charging nanoparticles in a flow using UV light, and collecting the current, which is proportional to the surface area of the particles. This allows both direct measurement of the total surface area, and by changing the voltage applied, also a measurement ot the particle size.
Method for charging nanoparticles and collecting total charges in a flow.
Measured current.
Robert T. Nishida, Adam M. Boies, Simone Hochgreb. Measuring ultrafine aerosols by direct photoionization and charge capture in continuous flow. Aerosol Science and Technology, 52:546-556, 2018, https://doi.org/10.1080/02786826.2018.1430350