Affordable Access

Publisher Website

Heterogeneous nucleation of ice at the liquid-liquid interface

Authors
Journal
Journal of Aerosol Science
0021-8502
Publisher
Elsevier
Publication Date
Volume
21
Issue
1
Identifiers
DOI: 10.1016/0021-8502(90)90025-s

Abstract

Abstract Aerosol particles containing liquid terpenes do not act as cloud condensation nuclei; they do not initiate formation of cloud droplets in clouds. They do, however, act as ice-forming nuclei initiating formation of ice particles. Presence of sulfate ions in cloud droplets appears to make them susceptible to freezing at higher temperatures when in contact with some of the terpenes. Heterogeneous nucleation of ice at a liquid-liquid interface was found to take place at higher temperatures in aqueous ammonium sulfate solutions than in pure water. The averaged temperatures of the phase transition were −3.6, −4.7, −4.4 and −4.8°C for pine needle oil, α-pinene oxide, eucalyptol and linalool, respectively; the corresponding temperature increases were 4.7, 7.8, 3.6 and 6.7°C. Separation of terpene molecules by dilution in carbon tetrachloride produced a marked decrease in ice nucleation temperatures. It was suggested that the arrangements of dipoles at the interface have decisive influences on the phase transition. Temperature of ice nucleation in the presence of solutions of hexadecanol in carbon tetrachloride generally decreases with a decrease of its concentration; the highest temperature of −5.0°C was found at 10 −3 M of hexadecanol and 10 −1 M of ammonium sulfate.

There are no comments yet on this publication. Be the first to share your thoughts.

Statistics

Seen <100 times
0 Comments

More articles like this

Note: Heterogeneous ice nucleation on silver-iodid...

on The Journal of Chemical Physic... Dec 07, 2014

Molecular simulations of heterogeneous ice nucleat...

on The Journal of Chemical Physic... May 14, 2015

Molecular simulations of heterogeneous ice nucleat...

on The Journal of Chemical Physic... May 14, 2015

Effects of surface interactions on heterogeneous i...

on The Journal of Chemical Physic... Aug 28, 2014
More articles like this..