エアロゾル研究
Online ISSN : 1881-543X
Print ISSN : 0912-2834
ISSN-L : 0912-2834
33 巻 , 2 号
選択された号の論文の7件中1~7を表示しています
特集「大気エアロゾル濃度の長期観測と人為起源排出量の長期変化」
研究論文
  • Ferry FAIZAL, Suryani SAALLAH, Azusa TAKAGI, I. Wuled LENGGORO
    2018 年 33 巻 2 号 p. 102-107
    発行日: 2018/06/20
    公開日: 2018/06/29
    ジャーナル フリー

    An aerosol flow system has been constructed to mimic the delivery of particles to the air-liquid interface. A colloidal suspension of submicron fluorescent core-shell silica-based particles was sprayed by an ultrasonic nebulizer. The dynamics of the aerosol settling was investigated by numerical simulation to determine the carrier gas flow rate, which was further verified through experimentation. Fluorescent microscopy, a non-vacuum imaging technique, was used to observe the particles deposited on the substrate. It was found that the apparent (fluorescent) size distribution was shifted from 2.9 ± 6.0 μm to 1.7 ± 2.2 μm, which is correlated to the shift in the aggregate size from 0.70 μm to 0.24 μm due to the changes in the colloidal suspension concentration. In addition, the uniformity of the particles dispersed on the substrate was not significantly affected by the suspension’s concentration, as confirmed by the inter-particle distance analysis. It is therefore suggested that the method presented here may potentially be applied for the deposition and analysis of submicron particles on various types of substrate (i.e. air-liquid interface) without the need for vacuum imaging analysis (e.g. electron microscopy).

連載 エアロゾル学基礎講座 ―計測―
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