Freezing of water adsorbed on hydrophobic and activated soot particles

Demirdjian, Benjamin; Ferry, Daniel; Suzanne, J.; Popovicheva, Olga; Persiantseva, N. M.; Kamaev, A. V.; Shonija, Natalia K.; Zubareva, N. A.

doi:10.1016/j.cplett.2009.09.021

Cited by 14 publications

(23 citation statements)

References 30 publications

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“…[15,52] Moreover, the adsorption energy calculated herein and on the other types of carbonaceous nanoparticles are in close agreement with the water adsorption enthalpy measured on aviation kerosene soot [53] and on various activated carbon surfaces. [54] …”

Section: Comparison With Water Adsorption On Other Types Of Carbonacesupporting

confidence: 84%

“…Finally, the formation of small water aggregates around the active sites present at a soot surface is in full agreement with experimental interpretations of adsorption isothermal measurements on various types of soot. [15,52] Moreover, the adsorption energy calculated herein and on the other types of carbonaceous nanoparticles are in close agreement with the water adsorption enthalpy measured on aviation kerosene soot [53] and on various activated carbon surfaces. [54]…”

Section: Comparison With Water Adsorption On Other Types Of Carbonacesupporting

confidence: 78%

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Water Adsorption on Oxidized Single Atomic Vacancies Present at the Surface of Small Carbonaceous Nanoparticles Modeling Soot

et al. 2010

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Quantum calculations are used to study the interaction of water molecules with carbonaceous clusters containing one single carbon atom vacancy. This is a simple but realistic way to model the active surfaces found in soot emitted by aircrafts. Prior to water adsorption, the atomic vacancy is oxidised by an approaching oxygen molecule, which is also likely to occur behind planes. The results of the calculations show that this oxidation process results in the formation of one ketone-like site and one epoxide-like site around the atomic vacancy. These sites may act as nucleation centers for water molecules, which are, however, physisorbed on the oxidized surface, leading to very weak charge transfer with the surface. Although less attractive for water than, for instance, a carboxyl-like site, the ketone-like site can also participate in the hydrophilic behavior of soot primary particles. In contrast, the epoxide-like site formed around the vacancy shows a very low affinity for water molecules.

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Section: Comparison With Water Adsorption On Other Types Of Carbonacesupporting

confidence: 84%

Section: Comparison With Water Adsorption On Other Types Of Carbonacesupporting

confidence: 78%

Water Adsorption on Oxidized Single Atomic Vacancies Present at the Surface of Small Carbonaceous Nanoparticles Modeling Soot

et al. 2010

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“…Ice nucleation activity of various hydrophobic and hydrophilic soot particles reported by Koehler et al [2009] showed a wide range of onset conditions. It is not clear why soot particles from various sources exhibited different ice nucleation properties, but the size or radius of the curvature of soot nanostructures [Lupi et al, 2014]; the surface polarity or hydrophilic groups available on the soot surface [Popovicheva et al, 2008]; the layers of PAH compounds such as polyaromatics, alkanes, and benzene during combustion on the surface [Demirdjian et al, 2009]; and the different physico-chemical surface properties [Popovicheva et al, 2008] could have all played a role. A detailed investigation to understand the differences is beyond Geophysical Research Letters 10.1002/2016GL068707 the scope of this paper, but we emphasize the need for future laboratory studies to clarify the role of such soot surface characteristics.…”

Section: 1002/2016gl068707mentioning

confidence: 99%

Ice nucleation activity of diesel soot particles at cirrus relevant temperature conditions: Effects of hydration, secondary organics coating, soot morphology, and coagulation

Kulkarni

China

Liu

et al. 2016

Geophysical Research Letters

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Ice formation by diesel soot particles was investigated at temperatures ranging from −40 to −50°C. Size‐selected soot particles were physically and chemically aged in an environmental chamber, and their ice nucleating properties were determined using a continuous flow diffusion type ice nucleation chamber. Bare (freshly formed), hydrated, and compacted soot particles, as well as α‐pinene secondary organic aerosol (SOA)‐coated soot particles at high relative humidity conditions, showed ice formation activity at subsaturation conditions with respect to water but below the homogeneous freezing threshold conditions. However, SOA‐coated soot particles at dry conditions were observed to freeze at homogeneous freezing threshold conditions. Overall, our results suggest that heterogeneous ice nucleation activity of freshly emitted diesel soot particles are sensitive to some of the aging processes that soot can undergo in the atmosphere.

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“…Numerous laboratory studies have investigated the ice nucleation ability of soot (e.g., Garten and Head, 1964;De-Mott, 1990;Diehl and Mitra, 1998;Gorbunov et al, 1998;DeMott et al, 1999;Gorbunov et al, 2001;Suzanne et al, 2003;Popovicheva et al, 2004;Möhler et al, 2005a, b;Dymarska et al, 2006;Kanji and Abbatt, 2006;DeMott et al, 2009;Fornea et al, 2009;Koehler et al, 2009;Kanji et al, 2011;Crawford et al, 2011;Chou et al, 2013;Brooks et al, 2014;Kulkarni et al, 2016;Schill et al, 2016;Charnawskas et al, 2017;Demirdjian et al, 2009;Kireeva et al, 2009;Häusler et al, 2018) and a review was recently provided by Ullrich et al (2017). However, these studies have revealed a large variability in ice nucleation characteristics of soot particles, indicating that the ice formation ability of soot remains poorly understood.…”

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confidence: 99%

Ice nucleation abilities of soot particles determined with the Horizontal Ice Nucleation Chamber

et al. 2018

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Abstract. Ice nucleation by different types of soot particles is systematically investigated over the temperature range from 218 to 253 K relevant for both mixed-phase (MPCs) and cirrus clouds. Soot types were selected to represent a range of physicochemical properties associated with combustion particles. Their ice nucleation ability was determined as a function of particle size using relative humidity (RH) scans in the Horizontal Ice Nucleation Chamber (HINC). We complement our ice nucleation results by a suite of particle characterization measurements, including determination of particle surface area, fractal dimension, temperature-dependent mass loss (ML), water vapor sorption and inferred porosity measurements. Independent of particle size, all soot types reveal absence of ice nucleation below and at water saturation in the MPC regime (T>235 K). In the cirrus regime (T≤235 K), soot types show different freezing behavior depending on particle size and soot type, but the freezing is closely linked to the soot particle properties. Specifically, our results suggest that if soot aggregates contain mesopores (pore diameters of 2–50 nm) and have sufficiently low water–soot contact angles, they show ice nucleation activity and can contribute to ice formation in the cirrus regime at RH well below homogeneous freezing of solution droplets. We attribute the observed ice nucleation to a pore condensation and freezing (PCF) mechanism. Nevertheless, soot particles without cavities of the right size and/or too-high contact angles nucleate ice only at or well above the RH required for homogeneous freezing conditions of solution droplets. Thus, our results imply that soot particles able to nucleate ice via PCF could impact the microphysical properties of ice clouds.

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Freezing of water adsorbed on hydrophobic and activated soot particles

Cited by 14 publications

References 30 publications

Water Adsorption on Oxidized Single Atomic Vacancies Present at the Surface of Small Carbonaceous Nanoparticles Modeling Soot

Water Adsorption on Oxidized Single Atomic Vacancies Present at the Surface of Small Carbonaceous Nanoparticles Modeling Soot

Ice nucleation activity of diesel soot particles at cirrus relevant temperature conditions: Effects of hydration, secondary organics coating, soot morphology, and coagulation

Ice nucleation abilities of soot particles determined with the Horizontal Ice Nucleation Chamber

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