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ID 18659
本文ファイル
著者
Han, Bangwoo
Choi, Mansoo
キーワード
Aerosol particle
Bipolar charging
Monodisperse
Photoionization
Soft X-ray
抄録(英)
At high concentrations of ambient bipolar ions, charged aerosol particles show a stationary charging state as a function of particle size. When the particle diameter exceeds 0.1 μm, a considerable fraction of multiply charged particles is present, which hinders size classification of particles, when a differential mobility analyzer (DMA) is used. However, at low ion concentrations, particle charging by the ions can be suppressed, and in principle, the production of multiply charged particles can be reduced even when the particle size is larger than 0.1 μm. In this study, a use of a power-adjustable soft X-ray emitter was investigated for the first time as the ionization source of an aerosol charger. The bipolar ion concentration was found to be adjustable between 1010 and 1013 ions/m 3. Through proper control of the bipolar ion concentration in the soft X-ray aerosol charger, multiply charged particles were reduced to less than 50f the singly charged particles, while the singly charged particles remained at a relatively high concentration with most of the particles in size range of 0.1-1.0 μm. Therefore, highly monodisperse aerosol particles in the 0.1-1.0-μm-diameter range could be generated using this technique with a commercialized differential mobility analyzer.
掲載誌名
Powder Technology
135-136巻
開始ページ
336
終了ページ
344
出版年月日
2003-10-02
出版者
Elsevier B.V.
ISSN
0032-5910
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
author
権利情報
(c) 2003 Elsevier B.V.
関連情報URL(IsVersionOf)
http://dx.doi.org/10.1016/S0032-5910(03)00167-0
部局名
工学研究科