TITLE

Ion and nano-particle measurement in ion-induced nucleation process

AUTHOR(S)
Okuyama, Kikuo; Shimada, Manabu; Kim, Chan S.
PUB. DATE
August 2000
SOURCE
AIP Conference Proceedings;2000, Vol. 534 Issue 1, p665
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Ion-induced nucleation is the process leading supersaturated vapors to condense on ions and has become an attractive research subject to understand the gas-to-particle conversion process involving generation of ions and nanometer sized particles (nano-particles). In order to measure the mobility distribution of ions and nano-particles in the ion-induced nucleation process, the current aerosol measurement technology has been recently improved. The performance of these methods was confirmed by measuring the electrical mobility distribution of water ions generated by various methods. Ion-induced nucleation experiments using these improved aerosol measurement capabilities were performed for the following two cases: (1) condensation of supersaturated vapors onto monovalent and divalent ions of varying size, and (2) ion and nano-particle formation from SO[sub 2], NO[sub 2], H[sub 2]O, NH[sub 3] and air mixture by ionizing irradiation. The results clearly show that ion-induced nucleation depends greatly on the sign of ion, ion size, type of vapor and supersaturation ratio.
ACCESSION #
5669674

 

Related Articles

  • The influence of particle solubility on heterogeneous nucleation in binary vapor mixtures. Petersen, D.; Ortner, R.; Vrtala, A.; Laaksonen, A.; Kulmala, M.; Wagner, P. E. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p135 

    Heterogeneous nucleation of binary n-propanol — water vapor mixtures on non-soluble or partially soluble 8nm Ag and NaCl particles has been investigated experimentally. At constant temperature the vapor activities have been stepwise increased and the number of particles activated to...

  • Analytical prediction of homogeneous nucleation in rapidly expanding pure vapours. Young, J. B.; Huang, L. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p884 

    The paper describes an analytical method for predicting the maximum vapour subcooling and final droplet number distribution in a rapidly expanding pure vapour undergoing homogeneous nucleation. This type of flow is characterised by very high nucleation rates which are quenched by the release of...

  • Characterization of aerosol particles by their heterogeneous nucleation: Activity at low supersaturations with respect to water and various organic vapors. Holla¨nder, W.; Dunkhorst, W.; Windt, H. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p732 

    An expansion type cloud condensation nucleus counter/Kelvin spectrometer has been operated with water and various organic liquids. Heterogeneous nucleation is markedly different depending on the particle/vapor material combination.

  • Sticking probability and uptake coefficient—a quantitative comparison. Kulmala, M.; Wagner, P. E. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p519 

    An analytical formula, where the uptake coefficient is given as a function of mass accommodation coefficient, has been derived. The uptake coefficient is seen always to be smaller than or equal to the mass accommodation coefficient. The independence of the uptake coefficient on mass...

  • Thermodynamics and nucleation studies of III-nitride materials grown from vapor phase. Varadarajan, E.; Dhanasekaran, R.; Ramasamy, P. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p319 

    The initial stage of growth of III-Nitrides ternary compound on binary substrate were analysed using the classical heterogeneous nucleation theory, incorporating lattice mismatch between the grown alloy and the substrate. The explicit expression for the lattice mismatch induced supercooling for...

  • MD simulation of heterogeneous vapor nucleation on a solid surface. Kholmurodov, K. T.; Yasuoka, K.; Zeng, X. C. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p253 

    Molecular dynamics simulations of nucleation of a supersaturated Lennard-Jones vapor confined between parallel solid walls have been performed. The walls in the system, unlike the structure-less one [K.Yasuoka, G. T. Gao, and X. C. Zeng, J. Chem. Phys. 112, pp.4279-4285 (2000)], are simulated in...

  • Comments on kinetics and thermodynamics of condensations under homogeneous conditions. Bauer, S. H.; Zhang, Y-.X; Wilcox, C. F. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p159 

    © 2000 American Institute of Physics.

  • Homogeneous nucleation rates for water. Wo¨lk, Judith; Viisanen, Yrjo¨; Strey, Reinhard // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p7 

    Homogeneous nucleation rates of light (H[sub 2]O) and heavy (D[sub 2]O) water have been measured under identical conditions. Comparing the nucleation rates for H[sub 2]O and D[sub 2]O at the same respective vapor pressure p[sub v] and temperature T the rates differ by a factor of 2500. However,...

  • Nucleation of water vapor in methane at high pressure. Peeters, P.; van Dongen, M. E. H. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p67 

    Preliminary experimental results of nucleation of water vapor in methane at high pressure are presented. The results are obtained by applying the nucleation pulse method, using a modified shock tube. The nucleation conditions were taken at two different temperatures (250 K and 240 K) and three...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics