Automated Determination of Aggregate Primary Particle Size Distribution by TEM Image Analysis: Application to Soot

Bescond, A.; Yon, Jérôme; Ouf, F. X.; Ferry, Daniel; Delhaye, D.; Gaffié, D.; Coppalle, A.; Rozé, C

doi:10.1080/02786826.2014.932896

Cited by 108 publications

(99 citation statements)

References 42 publications

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“…For simplification, numerical studies on BC clusters always assume the monomers to have exactly the same diameter and to attach with others without overlapping. However, some experimental studies indicate that this is not true for realistic BC aggregates: the monomer diameters were found to vary from approximately 10 nm to over 100 nm following a lognormal size distribution Faeth 1992, 1994;Lehre et al 2003;Dankers and Leipertz 2004;Chakrabarty et al 2006Chakrabarty et al , 2007Liu et al 2006;Bescond et al 2014). Bescond et al (2014) presented an automated method for determination of the monomer size distribution, and also show the wide variation on monomer diameters.…”

Section: Introductionmentioning

confidence: 99%

“…Here, d geo is the geometric mean of monomer diameters, and the geometric standard deviation s exhibits values from 1.1 to over 1.6 from various observations Faeth 1992, 1994;Lehre et al 2003;Dankers and Leipertz 2004;Chakrabarty et al 2006Chakrabarty et al , 2007Liu et al 2006;Bescond et al 2014). It should be noticed that the size distribution in Equation (2) is normalized.…”

Section: Introductionmentioning

confidence: 99%

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The Effects of Monomer Size Distribution on the Radiative Properties of Black Carbon Aggregates

Liu

Yin

et al. 2015

Aerosol Science and Technology

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Black carbon (BC), normally existing as aggregates, significantly affects the Earth radiative forcing, energy balance, and climate by scattering and absorbing both solar radiation and terrestrial emission. The BC particles are usually treated as fractal aggregates with same-sized monomers. However, experimental studies show that monomer diameters of BC normally obey a lognormal distribution ranging from 10 nm to over 100 nm. This study investigates the effects of monomer size distribution on the radiative properties of BC particles. The fractal aggregates are generated by a cluster-cluster aggregation (CCA) algorithm, and the Multiple Sphere T-Matrix (MSTM) method is used to simulate the radiative properties of randomly oriented aggregates. The integral radiative properties of aggregates with different-sized monomers have normal distributions with large standard deviations, and it requires to average radiative properties of over 60 aggregate realizations to represent their ensemble-averaged properties. The aggregates with different-sized monomers exhibit much stronger scattering and absorption than the aggregates with same-sized monomers and the geometric mean diameter, whereas the absorption cross section becomes comparable to that given by aggregates with same-sized monomer and the equivalent volume diameter. Similar phase matrix elements are obtained for the aggregates with different-sized and same-sized monomers. Furthermore, the Rayleigh-Debye-Gans (RDG) approach is significantly challenged for approximating the absorption and scattering cross sections of the aggregates with different-sized monomers, whereas it performs quite accurately for the phase matrix elements.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Effects of Monomer Size Distribution on the Radiative Properties of Black Carbon Aggregates

Liu

Yin

et al. 2015

Aerosol Science and Technology

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“…Several variants of the Hough transform have been developed, such as, the fast Hough transform (Li et al, 1986), twostage CHT (Yuen et al, 1990), space saving approach CHT (Albanesi and Ferretti, 1990), and the phase-10 coding method (Atherton and Kerbyson, 1999). These techniques have been used to detect natural particles with circular shapes in digital images, such as, circular nanoparticles in transmission electron microscopy (TEM) images (Bescond et al, 2014;Mirzaei and Rafsanjani, 2017).…”

Section: Technique To Identify Element Frozen Dropletsmentioning

confidence: 99%

“…Prior studies have used such techniques to identify the elemental or primary particles within black carbon aggregates (e.g., Bescond et al, 2014;China et al, 2013), most of which are circular. Similar…”

Section: Technique To Identify Element Frozen Dropletsmentioning

confidence: 99%

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Microphysical Characteristics of Frozen Droplet Aggregates from Deep Convective Clouds

Um¹,

McFarquhar²,

Stith³

et al. 2018

Preprint

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Numerical investigation on the Ångström exponent of black carbon aerosol

Liu

Yin

et al. 2016

JGR Atmospheres

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High concentration aerosol solid particle affect human health seriously. The transportation and diffusion processes of mid-air aerosol are vital to the understanding of the formation and evolution of fog-haze. Based on the mesoscale large-eddy simulation model ARPS and introducing atmosphere turbulence, the diffusion process of aerosol under different conditions is investigated. The results indicate that pollution diffusion in calm atmosphere is a rather slow process, while convection can push the pollution towards downwind effectively. Turbulence can affect the diffusion process profoundly and enhance the diffusion velocity largely. In the process of wet scavenging of aerosol particles, atmosphere turbulence increases the treating limits effectively but decreases the local efficiency to a certain extent.

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Automated Determination of Aggregate Primary Particle Size Distribution by TEM Image Analysis: Application to Soot

Cited by 108 publications

References 42 publications

The Effects of Monomer Size Distribution on the Radiative Properties of Black Carbon Aggregates

The Effects of Monomer Size Distribution on the Radiative Properties of Black Carbon Aggregates

Microphysical Characteristics of Frozen Droplet Aggregates from Deep Convective Clouds

Numerical investigation on the Ångström exponent of black carbon aerosol

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