Development of a Compact Electrostatic Nanoparticle Sampler for Offline Aerosol Characterization

He Jing, Siqin He, Qisheng Ou, Ta Chih Hsiao, Da Ren Chen

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

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.

Original languageEnglish (US)
Pages (from-to)217-226
Number of pages10
JournalMapan - Journal of Metrology Society of India
Volume28
Issue number3
DOIs
StatePublished - Sep 1 2013

Fingerprint

samplers
aerosols
electrostatics
nanoparticles
flow velocity
particle charging
ions
oleic acid
electric corona
sodium chlorides
charging
electron microscopy
charged particles
direct current
prototypes

Keywords

  • Collection efficiency
  • Electrostatic precipitation
  • Particle sampler

Cite this

Development of a Compact Electrostatic Nanoparticle Sampler for Offline Aerosol Characterization. / Jing, He; He, Siqin; Ou, Qisheng; Hsiao, Ta Chih; Chen, Da Ren.

In: Mapan - Journal of Metrology Society of India, Vol. 28, No. 3, 01.09.2013, p. 217-226.

Research output: Contribution to journalArticle

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