Preparation of (Ba,Sr)TiO3@polystrene core-shell nanoparticles by solvent-free surface-initiated atom transfer radical polymerization

► The PS shells have been successfully grown on the BST nanocrystals via an ATRP approach. ► The BST nanocrystals with modified surfaces act as macroinitiators for ATRP to yield core-shell structure. ► The PS shell can reach ∼10 nm in thickness when the polymerization time is extended to 36 h.