TY - JOUR
T1 - Effect of the surface energy of particle materials on the accommodation of gas molecules to the particle surfaces
AU - Jung, Haesung
AU - Han, Koohee
AU - Mulholland, George W.
AU - Pui, David Y.H.
AU - Kim, Jung Hyeun
PY - 2013
Y1 - 2013
N2 - In this study, the slip correction factor is assessed from the measurements of the electrical mobilities of PSL, SiO2 and Au nanoparticles under reduced pressure conditions. The asymptotic value (α+β) of the slip correction factor, which is generally used for evaluating the particle drag force, are obtained for three different particle materials, and the values are used to assess the momentum accommodation function. Our experimental results show that the gas molecular slip is strongly dependent on the particle material characteristics. The higher the surface energy of the particle materials (PSL: 0.06J/m2, SiO2: 0.30J/m2, and Au: 8.78J/m2), the more diffusive reflections observed in gas molecular collisions with nanoparticles (PSL: 87.3%, SiO2: 89.2%, and Au: 99.6%).
AB - In this study, the slip correction factor is assessed from the measurements of the electrical mobilities of PSL, SiO2 and Au nanoparticles under reduced pressure conditions. The asymptotic value (α+β) of the slip correction factor, which is generally used for evaluating the particle drag force, are obtained for three different particle materials, and the values are used to assess the momentum accommodation function. Our experimental results show that the gas molecular slip is strongly dependent on the particle material characteristics. The higher the surface energy of the particle materials (PSL: 0.06J/m2, SiO2: 0.30J/m2, and Au: 8.78J/m2), the more diffusive reflections observed in gas molecular collisions with nanoparticles (PSL: 87.3%, SiO2: 89.2%, and Au: 99.6%).
KW - Accommodation
KW - Differential mobility analyzer
KW - Drag force
KW - Nanoparticles
KW - Slip correction factor
KW - Surface energy
UR - http://www.scopus.com/inward/record.url?scp=84881519640&partnerID=8YFLogxK
U2 - 10.1016/j.jaerosci.2013.07.007
DO - 10.1016/j.jaerosci.2013.07.007
M3 - Article
AN - SCOPUS:84881519640
SN - 0021-8502
VL - 65
SP - 42
EP - 48
JO - Journal of Aerosol Science
JF - Journal of Aerosol Science
ER -