Sub-10 nm particle growth by vapor condensation – effects of vapor molecule size and particle thermal speed
By Tuomo Nieminen, K. Lehtinen, Markku Kulmala. 2010
166 citations recorded by the source corpus.
Abstract. The growth of freshly formed nanoparticles has been investigated. A new analytical expression based on a recently developed exact solution for the condensational growth rate has been derived. Based on the new growth rate, a new approximate but accurate analytical expression for growth time has been derived. The expression includes transition regime effects on growth, molecule size effects on the collision cross section and particle thermal speed effects on the relative collisional speeds – the last two of which are typically neglected, but may have significant effects when dealing with the growth of freshly nucleated particles. To demonstrate the use of the derived expressions, the contribution of sulphuric acid and organic compounds on sub 3 nm and sub 10 nm particle growth rates has been studied. For sulphuric acid also the effect of hydration as function of relative humidity has been taken into account. According to the new expression the sulphuric acid concentration needed for 1 nm/h growth in sub 3 nm range is ca. 1.5×107 cm−3, which is a factor of 1.5 smaller than values typically used in aerosol physics based on standard model in kinetic regime.
Subfields: Atmospheric Science, Global and Planetary Change
View Paper: https://www.semanticscholar.org/paper/46652244adfa69d3168cc5b6ac77428bf5cb9056
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In Atmospheric Science
In Global and Planetary Change
Citations in the corpus
- Size and time-resolved growth rate measurements of 1 to 5 nm freshly formed atmospheric nuclei (2012, background): “…Publications on behalf of the European Geosciences Union. rate (Sihto et al., 2006; Riipinen et al., 2007; Iida et al., 2008; Kuang et al., 2010; Nieminen et al., 2010) largely because organic compounds are responsible for up to 95 % of the growth (M̈akel̈a et al., 2001; O’Dowd et al., 2002;…”
- Cloud condensation nuclei production associated with atmospheric nucleation: a synthesis based on existing literature and new results (2012, background): “Large uncertainties regarding the growth rate of the smallest nuclei still exist, since this quantity depends in a complicated way on the dynamics and thermodynamics of the condensation process, and possibly also on other growth processes (Anttila et al., 2004; Kulmala et al., 2004b; Nieminen et al.”
- Atmospheric new particle formation and growth: review of field observations (2018, background): “For a nonvolatile compound, Ci,0=0 and A is relatively constant over the particle diameter range of 3−10 nm (Nieminen et al 2010), such that GRcond,i is directly proportional to both Ci andQi (see equations (10) and (12)).”