Ultrafine particles

Ultrafine particles, (UFP), are the smallest constituents of airborne particulate matter and are considered to be causing serious health problems and environmental effects. They may nucleate as a result of combustion processes or result from photochemical reactions of volatile precursor gases, thus showing a clear link to gaseous pollution. Recently, direct emission of man-made nanoparticles, e.g. from the incineration or degradation of synthetic nanomaterials, has attracted considerable attention.