Classification and condensation of nano-sized airborne particles by electrically tunning collection size

Yong Ho Kim, Soon Myoung Kwon, Dongho Park, Jungho Hwang, Yong Jun Kim

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

This paper demonstrates a hybrid particle classification and condensation device based on both aerodynamics and electrostatics using a micro virtual impactor (QVI). The MVI is capable of classifying the nanoparticles according to their size and condense their number concentration that we are interested. The MVI was fabricated using polymer micromachining. Its classification efficiency was examined using solid particles, polystyrene latex (PSL) ranging from 80 to 250 nm in diameter. Thereafter, specific-sized nanoparticles, NaCl of 50 nm in diameter, were condensed by applying an electric potential of 1.1 kV. As a result, the electric signal detected was amplified by 4 times higher than that when no electric potential was applied. The output signal was amplified by 4 times (before condensation: 4 fA, after condensation: 16 fA).

Original languageEnglish
Article number4805400
Pages (from-to)387-390
Number of pages4
JournalProceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS)
DOIs
Publication statusPublished - 2009 Jun 1
Event22nd IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2009 - Sorrento, Italy
Duration: 2009 Jan 252009 Jan 29

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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