Potentiality of Aerosol Size-Selection by a Novel Parallel Plate Double-Layer Differential Mobility Analyzer (DLDMA)

Abstract

Differential mobility analyzer (DMA) is recognized as one of the most reliable aerosol size classifier using the principle that electrical mobility of charged particles is dependent upon their size. Now, smaller and more complex nanoparticles have attracted more interest, and thus more careful, reliable, and high functional size classifier is being required. Recently, we proposed a novel double-layer differential mobility analyzer (DLDMA), composed of two parallel-plate DMAs connected in tandem with minimum distance. The DLDMA is capable of revealing rapid size changes during the mobility measurements and select the size of stable nanoparticles among unstable aerosol. The potentiality of aerosol size-selection by the DLDMA will be described.