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The critical velocity of rebound determined for sub-micron silver particles with a variable nozzle area impactor

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The critical velocity of rebound determined for sub-micron silver particles with a variable nozzle area impactor. / Arffman, Anssi; Kuuluvainen, Heino; Harra, Juha; Vuorinen, Ossi; Juuti, Paxton; Yli-Ojanperä, Jaakko; Mäkelä, Jyrki; Keskinen, Jorma.

In: Journal of Aerosol Science, Vol. 86, 01.08.2015, p. 32-43.

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Arffman, Anssi ; Kuuluvainen, Heino ; Harra, Juha ; Vuorinen, Ossi ; Juuti, Paxton ; Yli-Ojanperä, Jaakko ; Mäkelä, Jyrki ; Keskinen, Jorma. / The critical velocity of rebound determined for sub-micron silver particles with a variable nozzle area impactor. In: Journal of Aerosol Science. 2015 ; Vol. 86. pp. 32-43.

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@article{a8c386aba72a41b3afbd8f035f178422,
title = "The critical velocity of rebound determined for sub-micron silver particles with a variable nozzle area impactor",
abstract = "The critical velocity of rebound was determined for spherical silver aerosol particles in the size range of 20-1000. nm. A novel instrument, a variable nozzle area impactor, was especially designed for measuring the particle-surface interaction as a function of the particle impact velocity. The experimental results were combined with a numerical model in order to obtain the impact velocities. The experiments were carried out using a plain aluminum collection substrate in the impactor. Our results show that the critical velocity of rebound decreases from 14 to 0.022. m/s as the particle size increases from 20 to 1000. nm. Furthermore, the critical velocity was found to be proportional to the power of -1.6 of the particle size, instead of the theoretical inverse proportionality. This result is in line with the previous studies for micron-sized particles. In the nanoparticle size range, the obtained values are approximately 3-10 times greater than the recent literature values. This discrepancy can most likely be explained by the different surface materials. All in all, our results give valuable information about the particle-surface interactions in the sub-micron size range.",
keywords = "Silver nanoparticle, Rebound, Critical velocity, Low-pressure impactor, LOW-PRESSURE IMPACTOR, ORGANIC AEROSOL-PARTICLES, NANOPARTICLES, BOUNCE, MONODISPERSE, FRAGMENTATION, RESOLUTION, SURFACES, CAPTURE, DENSITY",
author = "Anssi Arffman and Heino Kuuluvainen and Juha Harra and Ossi Vuorinen and Paxton Juuti and Jaakko Yli-Ojanper{\"a} and Jyrki M{\"a}kel{\"a} and Jorma Keskinen",
year = "2015",
month = "8",
day = "1",
doi = "10.1016/j.jaerosci.2015.04.003",
language = "English",
volume = "86",
pages = "32--43",
journal = "Journal of Aerosol Science",
issn = "0021-8502",
publisher = "Elsevier",

}

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TY - JOUR

T1 - The critical velocity of rebound determined for sub-micron silver particles with a variable nozzle area impactor

AU - Arffman, Anssi

AU - Kuuluvainen, Heino

AU - Harra, Juha

AU - Vuorinen, Ossi

AU - Juuti, Paxton

AU - Yli-Ojanperä, Jaakko

AU - Mäkelä, Jyrki

AU - Keskinen, Jorma

PY - 2015/8/1

Y1 - 2015/8/1

N2 - The critical velocity of rebound was determined for spherical silver aerosol particles in the size range of 20-1000. nm. A novel instrument, a variable nozzle area impactor, was especially designed for measuring the particle-surface interaction as a function of the particle impact velocity. The experimental results were combined with a numerical model in order to obtain the impact velocities. The experiments were carried out using a plain aluminum collection substrate in the impactor. Our results show that the critical velocity of rebound decreases from 14 to 0.022. m/s as the particle size increases from 20 to 1000. nm. Furthermore, the critical velocity was found to be proportional to the power of -1.6 of the particle size, instead of the theoretical inverse proportionality. This result is in line with the previous studies for micron-sized particles. In the nanoparticle size range, the obtained values are approximately 3-10 times greater than the recent literature values. This discrepancy can most likely be explained by the different surface materials. All in all, our results give valuable information about the particle-surface interactions in the sub-micron size range.

AB - The critical velocity of rebound was determined for spherical silver aerosol particles in the size range of 20-1000. nm. A novel instrument, a variable nozzle area impactor, was especially designed for measuring the particle-surface interaction as a function of the particle impact velocity. The experimental results were combined with a numerical model in order to obtain the impact velocities. The experiments were carried out using a plain aluminum collection substrate in the impactor. Our results show that the critical velocity of rebound decreases from 14 to 0.022. m/s as the particle size increases from 20 to 1000. nm. Furthermore, the critical velocity was found to be proportional to the power of -1.6 of the particle size, instead of the theoretical inverse proportionality. This result is in line with the previous studies for micron-sized particles. In the nanoparticle size range, the obtained values are approximately 3-10 times greater than the recent literature values. This discrepancy can most likely be explained by the different surface materials. All in all, our results give valuable information about the particle-surface interactions in the sub-micron size range.

KW - Silver nanoparticle

KW - Rebound

KW - Critical velocity

KW - Low-pressure impactor

KW - LOW-PRESSURE IMPACTOR

KW - ORGANIC AEROSOL-PARTICLES

KW - NANOPARTICLES

KW - BOUNCE

KW - MONODISPERSE

KW - FRAGMENTATION

KW - RESOLUTION

KW - SURFACES

KW - CAPTURE

KW - DENSITY

UR - http://www.scopus.com/inward/record.url?scp=84928686591&partnerID=8YFLogxK

U2 - 10.1016/j.jaerosci.2015.04.003

DO - 10.1016/j.jaerosci.2015.04.003

M3 - Article

VL - 86

SP - 32

EP - 43

JO - Journal of Aerosol Science

JF - Journal of Aerosol Science

SN - 0021-8502

ER -