Abstract
Conventional virtual impactors experience a large pressure drop when they classify particles according to size, in particular ultrafine particles smaller than 100 nm in diameter. Therefore, most virtual impactors have been used to classify particles larger than 100 nm. Their cut-off diameters are also fixed by the geometry of their flow channels. In the proposed virtual impactor, particles smaller than 100 nm are accelerated by applying DC potentials to an integrated electrode pair. By the electrical acceleration, the large pressure drop could be significantly decreased and new cut-off diameters smaller than 100 nm could be successfully added. The geometric cut-off diameter (GCD) of the proposed virtual impactor was designed to be 1.0 m. Performances including the GCD and wall loss were examined by classifying dioctyl sebacate of 100 to 600 nm in size and carbon particles of 0.6 to 10 m in size. The GCD was measured to be 0.95 m, and the wall loss was highest at 1.1 m. To add new cut-off diameters, monodisperse NaCl particles ranging from 15 to 70 nm were classified using the proposed virtual impactor with applying a DC potential of 0.25 to 3.0 kV. In this range of the potential, the new cut-off diameters ranging from 15 to 35 nm was added.
| Original language | English |
|---|---|
| Pages (from-to) | 2722-2728 |
| Number of pages | 7 |
| Journal | Lab on a chip |
| Volume | 9 |
| Issue number | 18 |
| DOIs | |
| Publication status | Published - 2009 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Bioengineering
- Biochemistry
- Chemistry(all)
- Biomedical Engineering
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A hybrid chip based on aerodynamics and electrostatics for the size-dependent classification of ultrafine and nano particles. / Kim, Yong Ho; Park, Dongho; Hwang, Jungho; Kim, Yong-Jun.
In: Lab on a chip, Vol. 9, No. 18, 01.01.2009, p. 2722-2728.Research output: Contribution to journal › Article
TY - JOUR
T1 - A hybrid chip based on aerodynamics and electrostatics for the size-dependent classification of ultrafine and nano particles
AU - Kim, Yong Ho
AU - Park, Dongho
AU - Hwang, Jungho
AU - Kim, Yong-Jun
PY - 2009/1/1
Y1 - 2009/1/1
N2 - Conventional virtual impactors experience a large pressure drop when they classify particles according to size, in particular ultrafine particles smaller than 100 nm in diameter. Therefore, most virtual impactors have been used to classify particles larger than 100 nm. Their cut-off diameters are also fixed by the geometry of their flow channels. In the proposed virtual impactor, particles smaller than 100 nm are accelerated by applying DC potentials to an integrated electrode pair. By the electrical acceleration, the large pressure drop could be significantly decreased and new cut-off diameters smaller than 100 nm could be successfully added. The geometric cut-off diameter (GCD) of the proposed virtual impactor was designed to be 1.0 m. Performances including the GCD and wall loss were examined by classifying dioctyl sebacate of 100 to 600 nm in size and carbon particles of 0.6 to 10 m in size. The GCD was measured to be 0.95 m, and the wall loss was highest at 1.1 m. To add new cut-off diameters, monodisperse NaCl particles ranging from 15 to 70 nm were classified using the proposed virtual impactor with applying a DC potential of 0.25 to 3.0 kV. In this range of the potential, the new cut-off diameters ranging from 15 to 35 nm was added.
AB - Conventional virtual impactors experience a large pressure drop when they classify particles according to size, in particular ultrafine particles smaller than 100 nm in diameter. Therefore, most virtual impactors have been used to classify particles larger than 100 nm. Their cut-off diameters are also fixed by the geometry of their flow channels. In the proposed virtual impactor, particles smaller than 100 nm are accelerated by applying DC potentials to an integrated electrode pair. By the electrical acceleration, the large pressure drop could be significantly decreased and new cut-off diameters smaller than 100 nm could be successfully added. The geometric cut-off diameter (GCD) of the proposed virtual impactor was designed to be 1.0 m. Performances including the GCD and wall loss were examined by classifying dioctyl sebacate of 100 to 600 nm in size and carbon particles of 0.6 to 10 m in size. The GCD was measured to be 0.95 m, and the wall loss was highest at 1.1 m. To add new cut-off diameters, monodisperse NaCl particles ranging from 15 to 70 nm were classified using the proposed virtual impactor with applying a DC potential of 0.25 to 3.0 kV. In this range of the potential, the new cut-off diameters ranging from 15 to 35 nm was added.
UR - http://www.scopus.com/inward/record.url?scp=69549137827&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=69549137827&partnerID=8YFLogxK
U2 - 10.1039/b902211b
DO - 10.1039/b902211b
M3 - Article
C2 - 19704989
AN - SCOPUS:69549137827
VL - 9
SP - 2722
EP - 2728
JO - Lab on a Chip - Miniaturisation for Chemistry and Biology
JF - Lab on a Chip - Miniaturisation for Chemistry and Biology
SN - 1473-0197
IS - 18
ER -