Andrew Dougherty, Franklin Stinner
We report the results of a new method of measuring the capillary length for the dendritic crystal growth of non-faceted materials. This method uses a nearly spherical crystal held near unstable equilibrium in an oscillating temperature field. For the growth of ammonium chloride crystals from aqueous solution, previous published estimates varied by over a factor of 20. With this new method, we find a capillary length d0 of 0.224 +- 0.005 nm, similar to that obtained for ammonium bromide crystals.
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http://arxiv.org/abs/1206.4030
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