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193470 
Journal Article 
Filtration efficiency of a fibrous filter for nanoparticles 
Kim, CS; Bao, L; Okuyama, K; Shimada, M; Niinuma, H 
2006 
Yes 
Journal of Nanoparticle Research
ISSN: 1388-0764
EISSN: 1572-896X 
8 
2 
215-221 
The filtration efficiency for nanoparticles down to 1 nm in size through glass fibrous filters was measured using an improved PSM-CNC system. In addition, the effects of relative humidity and particle charge were investigated for various nanoparticle diameters. The results show that the filtration efficiencies were independent of humidity and affected by particle charge in the case of particles below 100 nm in size. For particles smaller than 2 nm, the particle penetrations increased with decreasing particle size. These results suggest that the thermal rebound phenomena would be operative for nanoparticles with diameters below 2 nm, even though it would depend on the states of both the particles and the filter media. These results are particularly important for experimental investigations of the behavior of nanoparticles on a filter.