A collection of particles contained in an aerosol, provided with electrometers to determine the concentration and the particle size of the nanoparticles

The invention relates to a nanoparticle collection device may be present in an aerosol. The invention consists of an electrostatic collection of nanoparticles in an aerosol, according to a charging mechanism by diffusion of unipolar ions then without applying a corona field which allows their deposit in concentric rings at different places a single substrate plane arranged orthogonally to the flow direction of the aerosol. The larger particles are deposited into the center of the plane substrate and the finer the periphery. It also relates to a method of operation and the use of such a device for the evaluation of workers or consumers to nanoparticles.