@article{oai:nagasaki-u.repo.nii.ac.jp:00000166,
 author = {Nakagawa, Maho and Nakayama, Tomoki and Sasago, Hiroshi and Kuruma, Yuki and Yai, Hikari and Ogawa, Shuhei and Deng, Yange and Mochida, Michihiro and Matsumi, Yutaka},
 issue = {11},
 journal = {Aerosol and Air Quality Research},
 month = {Jul},
 note = {he sphericity of particles must be considered when evaluating their effects on the climate and human health. Thus, to examine this property and its controlling factors, this study measured the scattering 
angular distributions of both thermodenuded and non-thermodenuded individual particles with a diameter of 500 nm in real time using a home-made polar nephelometer in Nagoya, Japan. Estimating the sphericities based on the depths of the local minima in the scattering angular distributions, we found the ambient aerosols to be external mixtures of at least two types of particles, one with relatively high and the other with relatively low sphericity. Although most of the particles exhibiting high sphericity were removed as they passed through the thermodenuder, approximately one-third of the fraction exhibiting low sphericity remained. During the daytime, the proportion of the low-sphericity particles decreased, 
whereas the average sphericity of the high-sphericity particles increased, which can be attributed to photochemical formation and/or aging processes. On days with extremely high relative humidity, the diurnal variation in the average sphericity displayed another peak during the early morning, which may have been due to the secondary formation of nitrate., Aerosol and Air Quality Research, 20(11), pp.2474-2484; 2020},
 pages = {2474--2484},
 title = {Assessment of the Sphericity of Submicrometer Particles Using a Single-particle Polar Nephelometer at an Urban Site in Japan},
 volume = {20},
 year = {2020}
}