Phase Behavior of Methane Haze

Details Phase Behavior of Methane Haze Phase Behavior of Methane Haze

Jan 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007phrvl..98a3401s&link_type=abstract

Physical Review Letters, vol. 98, Issue 1, id. 013401

Physics

11

Phase Transitions In Clusters, Vibrational And Rotational Structure, Infrared And Raman Spectra, Atmospheres, Titan

Scientific paper

Methane aerosols play a fundamental role in the atmospheres of Neptune, Uranus, and Saturn’s moon Titan as borne out by the recent Cassini-Huygens mission. Here we present the first study of the phase behavior of free methane aerosol particles combining collisional cooling with rapid-scan infrared spectroscopy in situ. We find fast (within minutes) phase transitions to crystalline states directly after particle formation and characteristic surface effects for nanometer-sized particles. From our results, we conclude that in atmospheric clouds solid methane particles are crystalline.

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