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Pathak, Harshad, Woelk, Judith, Strey, Reinhard and Wyslouzil, Barbara E. (2014). Co-condensation of nonane and D2O in a supersonic nozzle. J. Chem. Phys., 140 (3). MELVILLE: AMER INST PHYSICS. ISSN 1089-7690

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Abstract

We study the unary and binary nucleation and growth of nonane-D2O nanodroplets in a supersonic nozzle. Fourier Transform Infrared spectroscopy measurements provide the overall composition of the droplets and Small Angle X-ray Scattering experiments measure the size and number density of the droplets. The unary nucleation rates Jmax of nonane, 9.4 x 1015 < Jmax /cm-3 s-1 < 2.0 x 1016, and those of D2O, 2.4 x 10(17) < J(max) /cm(-3) s(-1) < 4.1 x 10(17), measured here agree well with previous results. In most of the binary condensation experiments new particle formation is dominated by D2O, but the observed nucleation rates are decreased by up to a factor of 6 relative to the rates measured for pure D2O, an effect that can be partly explained by non-isothermal nucleation theory. The subsequent condensation of D2O is inhibited both by the increased temperature of the binary droplets relative to the pure D2O droplets, and because the binary droplet surface is expected to be comprised largely of nonane. For the one case where nonane appears to initiate condensation, we find that the nucleation rate is about 50% higher than that observed for pure nonane at comparable P-v0, consistent with significant particle formation driven by D2O. (C) 2014 AIP Publishing LLC.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Pathak, Harshad UNSPECIFIED UNSPECIFIED UNSPECIFIED Woelk, Judith UNSPECIFIED UNSPECIFIED UNSPECIFIED Strey, Reinhard UNSPECIFIED UNSPECIFIED UNSPECIFIED Wyslouzil, Barbara E. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-448308
DOI:	10.1063/1.4861052
Journal or Publication Title:	J. Chem. Phys.
Volume:	140
Number:	3
Date:	2014
Publisher:	AMER INST PHYSICS
Place of Publication:	MELVILLE
ISSN:	1089-7690
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language DEEP MARINE-SEDIMENTS; HOMOGENEOUS NUCLEATION; DROPLET GROWTH; WATER; BINARY; ADSORPTION; MIXTURES; CLUSTERS; SPECTRA; ACETONE Multiple languages Chemistry, Physical; Physics, Atomic, Molecular & Chemical Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/44830