THE THERMODYNAMICS OF THE PLANAR CRYSTAL NUCLEI FORMATION AT THE LIQUID — AIR INTERFACE
Keywords:
Gibbs free energy, surface tension, crystal nucleation, anthracene, naphthalene, air – liquid interphase, solution.Abstract
The paper is devoted to the thermodynamic study of the large flat organic compounds
(naphthalene, anthracene) single crystals formation from the solution at the liquid — air interface.
The free Gibbs energy changes of flat nuclei formation at liquid — air interface has been analyzed.
The crystal nucleus critical size lс, hс and work of his formation Ас was defined for naphthalene
example.
It has been founded that the possibility of crystals formation and growth on the surface of
the liquid — air is determined by the sign of the wetting parameter Δσ. The crystal nuclei formation
condition depending on the concentration and temperature factors has been analyzed. The presented
results are significant for the theory and practice of organic single crystals growth.
