Critical Radius of Supercooled Water Droplets: On the Transition toward Dendritic Freezing.

@article{Buttersack2016CriticalRO,
  title={Critical Radius of Supercooled Water Droplets: On the Transition toward Dendritic Freezing.},
  author={Tillmann Buttersack and Sigurd Bauerecker},
  journal={The journal of physical chemistry. B},
  year={2016},
  volume={120 3},
  pages={
          504-12
        }
}
The freezing of freely suspended supercooled water droplets with a diameter of bigger than a few micrometers splits into two rather different freezing stages. Within the first very fast dendritic freezing stage a spongy network ice with an ice portion of less than one-third forms and more than two-thirds of liquid water remain. In the present work the distribution of the ice portion in the droplet directly after the dendritic freezing phase as well as the evolution of the ice and temperature… 
Substrate Dependence of the Freezing Dynamics of Supercooled Water Films: A High-Speed Optical Microscope Study.
TLDR
A direct relationship was observed between the morphology of the dendrites formed in the first stage, which depends on the substrate, and the roughness and the shape of the surface of the ice, when freezing of the film was completed, opening the possibility of using surfaces and coatings to control ice morphology beyond anti-icing properties.
Microstructure Formation in Freezing Nanosuspension Droplets.
TLDR
The structural evolution of suspensions upon freezing is studied with optical microscopy in a suspended droplet configuration and a phenomenological description based on repulsion or engulfment of particles by solidifying ice fronts is proposed.
Hypercooling Temperature of Water is about 100 K Higher than Calculated before.
TLDR
A more thorough analysis taking into account the temperature dependence of the heat capacities of water and ice as well as of the enthalpy of freezing shows that the hypercooling temperature of water is about -64 °C or 209 K, almost 100 K higher than estimated before.
Growth rate of crystalline ice and the diffusivity of supercooled water from 126 to 262 K
TLDR
Using a pulsed-laser–heating technique, the crystalline-ice growth rate and liquid-water diffusivity for temperatures between 180 and 262 K in ultrahigh-vacuum conditions are determined, ruling out the hypothesis that water’s properties have a singularity at or near 228 K at ambient pressures.
Ice nucleation rates near ∼225 K.
We have measured the ice nucleation rates, Jice, in supercooled nano-droplets with radii ranging from 6.6 nm to 10 nm and droplet temperatures, Td, ranging from 225 K to 204 K. The initial
How Cubic Can Ice Be?
TLDR
The cubicity value determined here is higher than those determined in experiments with micron-sized drops but comparable to those found in molecular dynamics simulations, and most likely caused by the extremely low freezing temperatures and by the rapid freezing, which occurs on a ∼1 μs time scale in single nanodroplets.
Ice growth rate: Temperature dependence and effect of heat dissipation.
TLDR
These results strongly support the experiments predicting the existence of a maximum in the ice growth rate, and argue that such maximum is due to a competition between an increasing crystallization thermodynamic driving force and a decreasing molecular mobility on cooling.
Review of transport processes and particle self-assembly in acoustically levitated nanofluid droplets
Acoustic levitation has been the cornerstone of many interesting studies across multiple application domains ranging from biomedical engineering to spray drying. In the sphere of colloidal or
...
1
2
...

References

SHOWING 1-10 OF 61 REFERENCES
Electric effect during the fast dendritic freezing of supercooled water droplets.
TLDR
The experiments show clear evidence that the first rapid dendritic freezing stage significantly influences direction and amount of the electric potential during the second slow freezing stage, which resembles the well-investigated Workman-Reynolds freezing potential (WRFP).
The homogeneous ice nucleation rate of water droplets produced in a microfluidic device and the role of temperature uncertainty.
TLDR
A comprehensive error analysis suggests that absolute temperature accuracy is the single most important experimental parameter determining the uncertainty of the derived ice nucleation rates in the authors' experiments, and presumably also in many previous experiments.
Monitoring Ice Nucleation in Pure and Salty Water via High-Speed Imaging and Computer Simulations
High-speed monitoring of the freezing process of freely suspended supercooled pure and salty water droplets is reported for the first time. Combined visual (VIS) and infrared (IR) imaging directly
Surface crystallization of supercooled water in clouds
TLDR
It is shown that the process of ice nucleus formation at the air (or oil)-liquid water interface may help to explain why experimental results on ice nucleation rates yield different results in different ambient phases, and that surface crystallization of ice in cloud droplets can explain why low amounts of supercooled water have been observed in the atmosphere near −40°C.
Experimental Studies of the Crystallization of Supercooled Water
Abstract The crystal fabric of ice formed by the freezing of supercooled water was examined in polarized light. Drops of radius 0.1 cm were frozen by homogeneous nucleation at −33C, by various
Frost halos from supercooled water droplets
TLDR
It is demonstrated that evaporation from a freezing supercooled sessile droplet generates a condensation halo around the droplet, which crystallizes and drastically affects the surface behavior, which controls frost formation and propagation.
Kinetic aspects of the thermostatted growth of ice from supercooled water in simulations.
TLDR
The temperature dependence of the thermostatted ice growth is seen to be more complex than was previously reported: the crystallization process is very slow close to the melting point at 270 K, where the thermodynamic driving force for the phase transition is weak.
Mechanism of supercooled droplet freezing on surfaces.
TLDR
A novel perspective to icing and icephobicity is brought, unveiling the strong influence of environmental conditions in addition to the accepted effects of the surface conditions and hydrophobicity.
Heat of freezing for supercooled water: measurements at atmospheric pressure.
TLDR
Calorimetric measurements of the heat released by freezing water at atmospheric pressure as a function of supercooling show that the heat of freezing can be considerably below one predicted from a reversible hydrostatic process.
...
1
2
3
4
5
...