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Jens Jacob Iversen

Contact electrification in aerosolized monodispersed silica microspheres quantified using laser based velocimetry

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Contact electrification in aerosolized monodispersed silica microspheres quantified using laser based velocimetry. / Alois, Stefano; Merrison, Jonathan P.; Iversen, Jens Jacob; Sesterhenn, Joern.

I: Journal of Aerosol Science, Bind 106, 2017, s. 1-10.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

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@article{a03c23e04d4541dc9d90727473a482cb,
title = "Contact electrification in aerosolized monodispersed silica microspheres quantified using laser based velocimetry",
abstract = "The contact electrification of aerosolized micro particles has been studied using a novel technique involving laser velocimetry. This has allowed the simultaneous determination of size and electrical charge of individual silica microspheres (in the range 1 – 8 µm). Interestingly the particles interacting with the injector tube have been seen to become electrified with a relatively narrow range of surface charge concentration of around Q/4πr2 ~ −100 e-/µm2 (~ −0.02mC/m2) for all particle sizes. Several combinations of aerosol particle and injector tube composition were also investigated, some of which led to positive particle electrification and all of which resulted in similar values of measured surface charge concentration. The electrification was not seen to be strongly affected by gas composition and is in reasonable agreement with the expected maximum surface charge observed in previous experiments (< 0.1mC/m2). Possible explanations for this effect are discussed, including the possibility of field emission at the contact site. In the future this technique is intended also to be applied to particle-particle induced contact electrification and its material dependence.",
author = "Stefano Alois and Merrison, {Jonathan P.} and Iversen, {Jens Jacob} and Joern Sesterhenn",
year = "2017",
doi = "10.1016/j.jaerosci.2016.12.003",
language = "English",
volume = "106",
pages = "1--10",
journal = "Journal of Aerosol Science",
issn = "0021-8502",
publisher = "Pergamon Press",

}

RIS

TY - JOUR

T1 - Contact electrification in aerosolized monodispersed silica microspheres quantified using laser based velocimetry

AU - Alois, Stefano

AU - Merrison, Jonathan P.

AU - Iversen, Jens Jacob

AU - Sesterhenn, Joern

PY - 2017

Y1 - 2017

N2 - The contact electrification of aerosolized micro particles has been studied using a novel technique involving laser velocimetry. This has allowed the simultaneous determination of size and electrical charge of individual silica microspheres (in the range 1 – 8 µm). Interestingly the particles interacting with the injector tube have been seen to become electrified with a relatively narrow range of surface charge concentration of around Q/4πr2 ~ −100 e-/µm2 (~ −0.02mC/m2) for all particle sizes. Several combinations of aerosol particle and injector tube composition were also investigated, some of which led to positive particle electrification and all of which resulted in similar values of measured surface charge concentration. The electrification was not seen to be strongly affected by gas composition and is in reasonable agreement with the expected maximum surface charge observed in previous experiments (< 0.1mC/m2). Possible explanations for this effect are discussed, including the possibility of field emission at the contact site. In the future this technique is intended also to be applied to particle-particle induced contact electrification and its material dependence.

AB - The contact electrification of aerosolized micro particles has been studied using a novel technique involving laser velocimetry. This has allowed the simultaneous determination of size and electrical charge of individual silica microspheres (in the range 1 – 8 µm). Interestingly the particles interacting with the injector tube have been seen to become electrified with a relatively narrow range of surface charge concentration of around Q/4πr2 ~ −100 e-/µm2 (~ −0.02mC/m2) for all particle sizes. Several combinations of aerosol particle and injector tube composition were also investigated, some of which led to positive particle electrification and all of which resulted in similar values of measured surface charge concentration. The electrification was not seen to be strongly affected by gas composition and is in reasonable agreement with the expected maximum surface charge observed in previous experiments (< 0.1mC/m2). Possible explanations for this effect are discussed, including the possibility of field emission at the contact site. In the future this technique is intended also to be applied to particle-particle induced contact electrification and its material dependence.

U2 - 10.1016/j.jaerosci.2016.12.003

DO - 10.1016/j.jaerosci.2016.12.003

M3 - Journal article

VL - 106

SP - 1

EP - 10

JO - Journal of Aerosol Science

JF - Journal of Aerosol Science

SN - 0021-8502

ER -