▎ 摘　　要

The smectic-A to chiral smectic-C* (SmA-SmC*) phase transition in the mixture of graphene nanoparticles and ferroelectric liquid crystal is studied. Combination of Flory-Huggins free energy of isotropic mixing and Landau theory is applied to explain the effects of graphene nanoparticles on the SmA-SmC* phase transition. The temperature and concentration of graphene nanoparticles dependence of tilt angle, spontaneous polarization and dielectric susceptibility in the smectic-C* phase of the SmA-SmC* phase transition are discussed. A qualitative agreement between theoretical results and experimental results is found.