TY - JOUR
T1 - Development of a Compact Electrostatic Nanoparticle Sampler for Offline Aerosol Characterization
AU - Jing, He
AU - He, Siqin
AU - Ou, Qisheng
AU - Hsiao, Ta Chih
AU - Chen, Da Ren
PY - 2013/9
Y1 - 2013/9
N2 - A compact electrostatic nanoparticle sampler has been developed to support the offline analysis of nanoparticles via electron microscopy. The basic operational principle of the sampler is to electrically charge particles by mixing nanoparticles and unipolar ions produced by DC corona discharge, and electrostatically collecting charged particles. A parametric study was first performed to identify the optimal operating condition of the sampler: a total flow rate (i.e., the sum of the particle and ion carrier flow rates) of 1.0 lpm, an aerosol/ion carrier flow rate ratio of 1.0, and a collection voltage of 4.5 kV. Under the above condition, the sampler achieved a collection efficiency of more than 90 % for particles ranging from 50 to 500 nm. The effect of particle material on the sampler's performance was also studied. The prototype had lower collection efficiencies for oleic acid particles than for sodium chloride particles in the size range from 50 to 150 nm, while achieving a comparable efficiency in the size range large than 150 nm. Effects of particle diameter, particle material, and total flow rate on the sampler's collection efficiency are explained by the particle charging data, i.e., charging efficiencies and average charges per particle.
AB - A compact electrostatic nanoparticle sampler has been developed to support the offline analysis of nanoparticles via electron microscopy. The basic operational principle of the sampler is to electrically charge particles by mixing nanoparticles and unipolar ions produced by DC corona discharge, and electrostatically collecting charged particles. A parametric study was first performed to identify the optimal operating condition of the sampler: a total flow rate (i.e., the sum of the particle and ion carrier flow rates) of 1.0 lpm, an aerosol/ion carrier flow rate ratio of 1.0, and a collection voltage of 4.5 kV. Under the above condition, the sampler achieved a collection efficiency of more than 90 % for particles ranging from 50 to 500 nm. The effect of particle material on the sampler's performance was also studied. The prototype had lower collection efficiencies for oleic acid particles than for sodium chloride particles in the size range from 50 to 150 nm, while achieving a comparable efficiency in the size range large than 150 nm. Effects of particle diameter, particle material, and total flow rate on the sampler's collection efficiency are explained by the particle charging data, i.e., charging efficiencies and average charges per particle.
KW - Collection efficiency
KW - Electrostatic precipitation
KW - Particle sampler
UR - http://www.scopus.com/inward/record.url?scp=84886018670&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84886018670&partnerID=8YFLogxK
U2 - 10.1007/s12647-013-0072-y
DO - 10.1007/s12647-013-0072-y
M3 - Article
AN - SCOPUS:84886018670
SN - 0970-3950
VL - 28
SP - 217
EP - 226
JO - Mapan - Journal of Metrology Society of India
JF - Mapan - Journal of Metrology Society of India
IS - 3
ER -