Development and Evaluation of a New Soft
X-Ray Aerosol Charger

	#br#

Abstract

Abstract: Currently most of the aerosol chargers have poor penetration and charging efficiencies for 1∼3 nm aerosols. A new soft X-ray aerosol charger is developed and evaluated. While maintaining similar intrinsic charging efficiency to the other chargers, its penetration efficiency is significantly increased through the improvement of the structure design. Laboratory evaluations show that, compared with commercialized TSI 3088 soft X-ray charger, the penetration efficiencies of the new developed charger for sub-3 nm aerosols have been increased by 175%∼300% and 115%∼173% under 1.0 and 2.5 L·min−1 flow rates, respectively. Meanwhile, the intrinsic charging efficiencies of the new charger for 10∼40 nm and sub-3 nm aerosols is basically consistent with the intrinsic charging efficiencies estimated by a well-accepted Fuchs steady state approximation formula and those of the other similar aerosol chargers. Therefore, compared with the existing commercial chargers, the new developed charger is beneficial for its higher extrinsic charging efficiency for sub-3 nm aerosols, which indicates its potential application value

Key words: aerosol charger, soft X-ray, sub-3 nm particles, penetration efficiency, charging efficiency

CLC Number:

X851

WANG Dongbin♯, XUE Mo♯, CHEN Xiaotong, JIANG Jingkun∗. Development and Evaluation of a New Soft X-Ray Aerosol Charger #br# [J]. Journal of Atmospheric and Environmental Optics, 2020, 15(6): 429-437.

References 39

[1]	Poschl U. Atmospheric aerosols: composition, transformation, climate and health effects [J]. Angewandte Chemie. International Edition. 2005, 44 (46): 7520-7540.
[2]	Kulkarni P, Baron P A, Willeke K. Aerosol Measurement: Principles, Techniques, and Applications [M]. 3rd. John Wiley &
	Sons, 1996: 883.
[3]	Flagan R C. History of electrical aerosol measurements [J]. Aerosol Science and Technology, 1998, 28(4): 301-380.
[4]	Jiang J, Chen M, Kuang C, et al. Electrical mobility spectrometer using a diethylene glycol condensation particle counter for
	measurement of aerosol size distributions down to 1 nm [J]. Aerosol Science and Technology, 2011, 45(4): 510-521.
[5]	Wang S C, Flagan R C. Scanning electrical mobility spectrometer [J]. Aerosol Science and Technology, 1990, 13(2): 230-240.
[6]	Wiedensohler A, Birmili W, Nowak A, et al. Mobility particle size spectrometers: harmonization of technical standards and data
	structure to facilitate high quality long-term observations of atmospheric particle number size distributions [J]. Atmospheric
	Measurement Techniques, 2012, 5(3): 657-685.
[7]	Liu J, Jiang J, Zhang Q, et al. A spectrometer for measuring particle size distributions in the range of 3 nm to 10 µm [J].
	Frontiers of Environmental Science & Engineering, 2016, 10(1): 63-72.
[8]	Alonso M, Alguacil F J. Particle size distribution modification during and after electrical charging: Comparison between a
	corona ionizer and a radioactive neutralizer [J]. Aerosol and Air Quality Research, 2008, 8(4): 366-380.
[9]	Hernandez-Sierra A, Alguacil F J, Alonso M. Unipolar charging of nanometer aerosol particles in a corona ionizer [J]. Journal
	of Aerosol Science, 2003, 34(6): 733-745.
[10]	Intra P, Tippayawong N. An overview of unipolar charger developments for nanoparticle charging [J]. Aerosol and Air Quality
	Research, 2011, 11(2): 187-209.
[11]	Laschober C, Kaufman S L, Reischl G, et al. Comparison between an unipolar corona charger and a polonium-based bipolar
	neutralizer for the analysis of nanosized particles and biopolymers [J]. Journal of Nanoscience and Nanotechnology, 2006,
6(	5): 1474-1481.
[12]	Chen X, Jiang J. Retrieving the ion mobility ratio and aerosol charge fractions for a neutralizer in real-world applications [J].
	Aerosol Science and Technology, 2018, 52(10): 1145-1155.
[13]	Chen X, Mcmurry P H, Jiang J. Stationary characteristics in bipolar diffusion charging of aerosols: Improving the performance
	of electrical mobility size spectrometers [J]. Aerosol Science and Technology, 2018, 52(8): 809-813.
[14]	Tigges L, Jain A, Schmid H J. On the bipolar charge distribution used for mobility particle sizing: Theoretical considerations
[J]	Journal of Aerosol Science, 2015, 88: 119-134.
[15]	Adachi M, Kousaka Y, Okuyama K. Unipolar and bipolar diffusion charging of ultrafine aerosol-particles [J]. Journal of
	Aerosol Science, 1985, 16(2): 109-123.
[16]	Chen X T. Study of Aerosol Charging and Its Applications in Submicron Aerosol Measurement [D]. Beijing: Doctoral Dissertation of Tsinghua University, 2019.
	陈小彤. 气溶胶荷电研究及其在亚微米颗粒物测量中的应用 [D]. 北京: 清华大学博士论文, 2019.
[17]	Jiang J, Kim C, Wang X, et al. Aerosol charge fractions downstream of six bipolar chargers: Effects of ion source, source
	activity, and flowrate [J]. Aerosol Science and Technology, 2014, 48(12): 1207-1216.
[18]	Chen X, Jiang J, Chen D R. A soft X-ray unipolar charger for ultrafine particles [J]. Journal of Aerosol Science, 2019, 133:
66	-71.
[19]	Han B, Shimada M, Okuyama K, et al. Classification of monodisperse aerosol particles using an adjustable soft X-ray charger
[J]	Powder Technology, 2003, 135: 336-344.
[20]	Lee H M, Soo Kim C, Shimada M, et al. Bipolar diffusion charging for aerosol nanoparticle measurement using a soft X-ray
	charger [J]. Journal of Aerosol Science, 2005, 36(7): 813-829.[21] Shimada M, Han B W, Okuyama K, et al. Bipolar charging of aerosol nanoparticles by a soft X-ray photoionizer [J]. Journal
	of Chemical Engineering of Japan, 2002, 35(8): 786-793.
[22]	Tigges L, Wiedensohler A, Weinhold K, et al. Bipolar charge distribution of a soft X-ray diffusion charger [J]. Journal of
	Aerosol Science, 2015, 90: 77-86.
[23]	Fuchs N A. On the stationary charge distribution on aerosol particles in a bipolar ionic atmosphere [J]. Geofisica Pura E
	Applicata, 1963, 56(1): 185-193.
[24]	Hoppel W A, Frick G M. The nonequilibrium character of the aerosol charge distributions produced by neutralizes [J]. Aerosol
	Science and Technology, 2007, 12(3): 471-496.
[25]	Wiedensohler A, Lutkemeier E, Feldpausch M, et al. Investigation of the bipolar charge-distribution at various gas conditions
[J]	Journal of Aerosol Science, 1986, 17(3): 413-416.
[26]	De La Verpilliere J L, Swanson J J, Boies A M. Unsteady bipolar diffusion charging in aerosol neutralisers: A non-dimensional
	approach to predict charge distribution equilibrium behaviour [J]. Journal of Aerosol Science, 2015, 86: 55-68.
[27]	Wiedensohler A. An approximation of the bipolar charge-distribution for particles in the sub-micron size range [J]. Journal of
	Aerosol Science, 1988, 19(3): 387-389.
[28]	Xue M. Modification of Condensation Particle Counters for the Enhanced Detection of 1-3 nm Particles [D]. Beijing: Master′s
	Thesis of Tsinghua University, 2019.
	薛墨. 改进冷凝生长技术以提高 1-3 纳米大气颗粒物检测效率 [D]. 北京: 清华大学硕士论文, 2019.
[29]	Chen D R, Pui D Y H. A high efficiency, high throughput unipolar aerosol charger for nanoparticles [J]. Journal of Nanoparticle
	Research, 1999, (1): 115-126.
[30]	Cai R, Yang D, Fu Y, et al. Aerosol surface area concentration: a governing factor in new particle formation in Beijing [J].
	Atmospheric Chemistry and Physics, 2017, 17(20): 12327-12340.
[31]	Xue Mo, Fu Yueyun, Cai Runlong, et al. Penetration of 1∼3 nm particles through a diethylene glycol scanning mobility particle
	spectrometer (DEG-SMPS) [J]. Acta Scientiae Circumstantiae, 1999, 39(9): 2896-2902 (in Chinese).
	薛墨, 傅月芸, 蔡润龙, 等. 1∼3 nm 颗粒物在粒径分布测量仪中的通过效率研究 [J]. 环境科学学报, 2019, 39(9):
28	96-2902.
[32]	Kangasluoma J, Attoui M, Junninen H, et al. Sizing of neutral sub 3 nm tungsten oxide clusters using airmodus particle size
	magnifier [J]. Journal of Aerosol Science, 2015, 87: 53-62.
[33]	Peineke C, Attoui M, Robles R, et al. Production of equal sized atomic clusters by a hot wire [J]. Journal of Aerosol Science,
20	09, 40(5): 423-430.
[34]	Peineke C, Attoui M B, Schmidt-Ott A. Using a glowing wire generator for production of charged, uniformly sized nanoparticles at high concentrations [J]. Journal of Aerosol Science, 2006, 37(12): 1651-1661.
[35]	De La Mora J F, Kozlowski J. Hand-held differential mobility analyzers of high resolution for 1∼30 nm particles: Design and
	fabrication considerations [J]. Journal of Aerosol Science, 2013, 57: 45-53.
[36]	Ude S, De La Mora J F. Molecular monodisperse mobility and mass standards from electrosprays of tetra-alkyl ammonium
	halides [J]. Journal of Aerosol Science, 2005, 36(10): 1224-1237.
[37]	Gormley P G, Kennedy M. Diffusion from a stream flowing through a cylindrical tube [J]. Proceedings of the Royal Irish
	Academy, Section A (Mathematical, Astronomical and Physical Science), 1949, 52(12): 163-169.
[38]	Yoon Y H, Bong C, Kim D S. Evaluation of the performance of a soft X-ray charger for the bipolar charging of nanoparticles
[J]	Particuology, 2015, 18: 165-169.
[39]	Reischl G P, Makela J M, Karch R, et al. Bipolar charging of ultrafine particles in the size range below 10 nm [J]. Journal of
	Aerosol Science, 1996, 27(6): 931-949

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