Bipolar Charging of Aerosol Nanoparticles by a Soft X-ray Photoionizer

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Bangwoo Han²  Manabu Shimada²  Kikuo Okuyama²  Yoshio Otani¹ 

[1] Department of Chemistry and Chemical Engineering, Faculty of Engineering, Kanazawa University;Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University

关键词: Aerosol Nanoparticle;    Bipolar Charging;    Soft X-ray;    Photoionization;    Equilibrium Charging State;   

DOI  :  10.1252/jcej.35.786

来源: Maruzen Company Ltd

【 摘 要 】

References(13)Cited-By(37)A new bipolar charger for nanometer aerosols using soft X-ray photoionization was developed. The concentrations and mobility distributions of the positive and negative ions generated by the X-ray charger were investigated, and then the charging probability of nanoparticles was evaluated experimentally and theoretically. All experimental data of the X-ray charger were compared with those of a 241Am α-ray bipolar charger. It was found that the X-ray bipolar charger could produce at least about 3.5 times as high concentration of gaseous ions as the α-ray charger and thus could have particles attain the equilibrium bipolar charging state in shorter residence time than the α-ray charger. The charging state of particles attained by the X-ray charger was explained by theoretical calculations as well as α-ray bipolar charging. It was concluded that the X-ray charger would be a useful instrument for charging high number concentration nanoparticles in the electrical aerosol measurements.

【 授权许可】

Unknown