  Crystallization has long been the subject of research as one of the basic
ways in which solid materials are constructed. In particular, the nucleation
stage has not been isolated, thus has been predicted through many calculations
and achieved theoretical completion through the nucleation rate(J). Si nce most
of these results were obtained through isotropic building blocks in
three-dimensional space, it was difficult to interpret nuclei formed by
anisotropic building block in 2D or 1D structure. Recently, a lot of studies
related to amyloid fibril have shown nucleation of anisotropic building block.
However, due to the complexity of the amyloid fibrils, there is no unified
explanation of the thermodynamic method of classical nucleation theory which is
the energy loss from surface and energy gain from volume. We have
experimentally demonstrated the isolation of nuclei of the orthorhombic phase
of HYLION-12 which is a Dirac metamaterial and provide the effect of anisotropy
of the molecules on nucleation The thermal behavior of nuclei of Dirac
metamaterial through DSC has demonstrated that it can be crystallized to a
Dirac metamaterial through the first order phase transition. The growth process
is verified at low temperature where no phase transition occurs. The
calculation of surface and bulk energy of the Dirac metamaterial was conducted.
It could explain the isolation of nuclei of the Dirac metamaterial by enlarging
the thermodynamic classical nucleation theory.
