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Title

Unipolar charging of nanometer aerosol particles in a corona ionizer

AuthorsHernandez-Sierra, Aurora; Alguacil, Francisco José; Alonso Gámez, Manuel
KeywordsAerosol nanoparticle
Corona ionizer
Unipolar charging
Charging efficiency
Issue DateJun-2003
PublisherElsevier
CitationJournal of Aerosol Science 34 (6) : 733-745 (2003)
AbstractA corona ionizer for unipolar charging of nanometer-sized aerosol particles has been constructed and evaluated. Charging efficiency and particle deposition loss (electrostatic and diffusional) have been measured for particle mobility-equivalent diameters below View the MathML source, at different aerosol flow rates, different corona polarity and voltages, and also at two different positions of the corona electrode tip. Even though electrostatic deposition of charged particles within the ionizer was relatively large at high corona voltages, charging efficiencies as high as about 30% for View the MathML source particles could be achieved for positive and negative corona. This figure is almost one order of magnitude higher than that attainable with radioactive bipolar chargers, and similar to that recently reported for other types of unipolar chargers developed by several researchers.
Publisher version (URL)http://dx.doi.org/10.1016/S0021-8502(03)00033-8
URIhttp://hdl.handle.net/10261/43832
DOI10.1016/S0021-8502(03)00033-8
ISSN0021-8502
Appears in Collections:(CENIM) Artículos
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