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Chin. Phys. B, 2016, Vol. 25(3): 034201    DOI: 10.1088/1674-1056/25/3/034201

Theoretical studies on particle shape classification based on simultaneous small forward angle light scattering and aerodynamic sizing

Jin-Bi Zhang(张金碧)1,2, Lei Ding(丁蕾)1, Ying-Ping Wang(王颖萍)1, Li Zhang(张莉)1,2, Jin-Lei Wu(吴金雷)1,2, Hai-Yang Zheng(郑海洋)1, Li Fang(方黎)1
1. Laboratory of Environmental Spectroscopy, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China
Abstract  Particle shape contributes to understanding the physical and chemical processes of the atmosphere and better ascertaining the origins and chemical compositions of the particles. The particle shape can be classified by the aspect ratio, which can be estimated through the asymmetry factor measured with angularly resolved light scattering. An experimental method of obtaining the asymmetry factor based on simultaneous small forward angle light scattering and aerodynamic size measurements is described briefly. The near forward scattering intensity signals of three detectors in the azimuthal angles at 120° offset are calculated using the methods of T-matrix and discrete dipole approximation. Prolate spheroid particles with different aspect ratios are used as the shape models with the assumption that the symmetry axis is parallel to the flow axis and perpendicular to the incident light. The relations between the asymmetry factor and the optical size and aerodynamic size at various equivalent sizes, refractive indices, and mass densities are discussed in this paper. The numerically calculated results indicate that an elongated particle may be classified at diameter larger than 1.0 μm, and may not be distinguished from a sphere at diameter less than 0.5 μm. It is estimated that the lowest detected aspect ratio is around 1.5:1 in consideration of the experimental errors.
Keywords:  particle shape      aspect ratio      asymmetry factor      light scattering  
Received:  19 June 2015      Revised:  30 September 2015      Published:  05 March 2016
PACS:  42.25.Fx (Diffraction and scattering)  
  42.68.Mj (Scattering, polarization)  
  92.60.Mt (Particles and aerosols)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 41275132).
Corresponding Authors:  Jin-Bi Zhang     E-mail:

Cite this article: 

Jin-Bi Zhang(张金碧), Lei Ding(丁蕾), Ying-Ping Wang(王颖萍), Li Zhang(张莉), Jin-Lei Wu(吴金雷), Hai-Yang Zheng(郑海洋), Li Fang(方黎) Theoretical studies on particle shape classification based on simultaneous small forward angle light scattering and aerodynamic sizing 2016 Chin. Phys. B 25 034201

[1] Valavanidis A, Flotakis K and Vlachogianni T 2008 J. Environ. Sci. Health Pt. C-Environ. Carcinog. Ecotoxicol. Rev. 26 339
[2] Durant A J, Harrison S P, Watson I M and Balkanski Y 2009 Prog. Phys. Geogr. 33 80
[3] Després V R, Huffman J A, Burrows S M, Hoose C, Safatov A S, Buryak G, Fröhlich-nowoisky J, Elbert W, Andreae M O, Pöschl U and Jaenicke R 2012 Tellus Ser. B-Chem. Phys. Meteorol. 64 15598
[4] Hoekstra A, Maltsev V and Videen G 2007 Optics of Biological Particles (Dordrecht: Springer) pp. 31-61
[5] Aptowicz K B, Pinnick R G, Hill S C, Pan Y L and Chang R K 2006 J. Geophys. Res. 111 D12212
[6] Berg M J, Hill S C, Pan Y L and Videen G 2010 Opt. Express 18 23343
[7] Kaye P H, Alexander-Buckley K, Hirst E, Saunders S and Clark J M 1996 J. Geophys. Res. 101 19215
[8] Healy D A, O'Connor D J, Burke A M and Sodeau J R 2012 Atmos. Environ. 60 534
[9] O'Connor D J, Healy D A, Hellebust S, Buters J T M and Sodeau J R 2014 Aerosol Sci. Technol. 48 341
[10] Toprak E and Schnaiter M 2013 Atmos. Chem. Phys. 13 225
[11] Szymanski W W, Nagy A andCzitrovszky A 2009 J. Quant. Spectrosc. Radiat. Transf. 110 918
[12] Hirst E and Kaye P H 1996 J. Geophys. Res. 101 19231
[13] Kaye P, Hirst E and Wang-Thomas Z 1997 Appl. Opt. 36 6149
[14] Hirst E, Kaye P H, Greenaway R S, Field P and Johnson D W 2001 Atmos. Environ. 35 33
[15] Zhang J B, Ding L, Wang Y P, Zheng H Y and Fang L 2015 Acta Phys. Sin. 64 054202 (in Chinese)
[16] Bohren C F and Huffman D R 1983 Absorption and Scattering of Light by Small Particles (New York: Wiley) p. 65
[17] [2015-06-19]
[18] Yurkin M A and Hoekstra A G
[19] Hirst E, Kaye P H, Buckley K M and Saunders S J 1995 Part. Part. Syst. Charact. 12 3
[20] Healy D A, O'Connor D J and Sodeau J R 2012 J. Aerosol. Sci. 47 94
[21] [2015-06-19]
[22] DeCarlo P F, Slowik J G, Worsnop D R, Davidovits P and Jimenez J L 2004 Aerosol Sci. Technol. 38 1185
[23] Dahneke B E 1973 J. Aerosol. Sci. 4 139
[24] Merikallio S, Lindqvist H, Nousiainen T and Kahnert M 2011 Atmos. Chem. Phys. 11 5347
[25] Hahn D V, Limsui D, Joseph R I, Baldwin K C, Boggs N T, Carr A K, Carter C C, Han T S and Thomas M E 2008 Proc. SPIE 6954 69540W-1
[26] Pan Y L, Aptowicz K B and Chang R K 2003 Opt. Lett. 28 589
[27] Kaye P H, Barton J E, Hirst E and Clark J M 2000 Appl. Opt. 39 3738
[28] Carrera M, Zandomeni R O, Fitzgibbon J and Sagripanti J L 2007 J. Appl. Microbiol. 102 303
[29] Carrera M, Zandomeni R O and Sagripanti J L 2008 J. Appl. Microbiol. 105 68
[30] Tuminello P S, Arakawa E T, Khare B N, Wrobel J M, Querry M R and Milham M E 1997 Appl. Opt. 36 2818
[31] Sagripanti J L, Carrera M, Robertson J, Levy A and Inglis T J J 2011 Arch. Microbiol. 193 69
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