How volatile components catalyze vapor nucleation

Components of ice nucleation structures of bacteria.

Nonprotein components attached to the known protein product of the inaZ gene of Pseudomonas syringae have been identified and shown to be necessary for the most efficient ice nucleation of supercooled H2O. Previous studies have shown that cultures of Ina+ bacteria have cells with three major classes of ice-nucleating structures with readily differentiated activities. Further, some cells in the ...

Homogeneous nucleation and droplet growth in supersaturated argon vapor: the cryogenic nucleation pulse chamber.

We built a cryogenic nucleation pulse chamber for measuring homogeneous nucleation rates of argon. First measurements show that the growth rate of argon droplets at nucleation conditions is rather high so that nucleation and growth could not yet be decoupled. Nevertheless, the experiments permit an estimate of the onset of nucleation corresponding to a nucleation rate of J=10(7(+/-2)) cm(-3) s(...

Molecular dynamics simulation of supersaturated vapor nucleation in slit pore

Density functional theory of inhomogeneous liquids. III. Liquid-vapor nucleation.

The process of nucleation of vapor bubbles from a superheated liquid and of liquid droplets from a supersaturated vapor is investigated using the modified-core van der Waals model density functional theory [J. F. Lutsko, J. Chem. Phys. 128, 184711 (2008)]. A novel approach is developed whereby nucleation is viewed as a transition from a metastable state to a stable state via the minimum free en...

Nucleation mechanisms in chemically vapor-deposited mullite coatings on SiC

Dense, uniform, and adherent chemically vapor-deposited mullite coatings were deposited on SiC substrates using the AlCl3–SiCl4–H2–CO2 system. Typical coating morphology consisted of a thin interfacial layer of g–Al2O3 nanocrystallites embedded within a vitreous SiO2-based matrix. When a critical Al/Si ratio of 3.2 ± 0.29 was reached within this nanocrystalline layer, mullite crystals nucleated...