Synthesis of textured discontinuous-nanoisland Ca 3 Co 4 O 9 thin films.

Controllable engineering of the nanoporosity in layered Ca 3 Co 4 O 9 remains a challenge. Here, we show the synthesis of discontinuous films with islands of highly textured Ca 3 Co 4 O 9 , effectively constituting distributed nanoparticles with controlled porosity and morphology. These discontinuously dispersed textured Ca 3 Co 4 O 9 nanoparticles may be a candidate for hybrid thermoelectrics.