“…It is interesting that as D decreases, the metastable high-pressure phases and some denser parking phases, which have not been found in bulk state, are easily formed at ambient pressure. This phenomenon has been found in CdSe [167,261,262], HgS [263], ZnO [264], ZnS [265], GaAs [266] Fe [267], Co [268], Cr [269], and In [270]. The essential reason is that there exists size-dependent P in for an isotropic spherical or quasispherical nanoparticle by f through Laplace-Young equation, namely Eq.…”