Abstract
Summary: This study examines the use of a PMMAβmediated assembly of BaTiO~3~ nanoparticles directly onto Cu electrodes under an electric field. The compatibility of the interface between BaTiO~3~ nanoparticles and PMMA in a mixed organic solvent system enables the homogeneous dispersion of nanoparticles in a solid polymer matrix. This results in the effective packing of particles, which is desirable from the point of view of achieving a high dielectric constant in the composite. In this study, threeβphase Al/BaTiO~3~/PMMA nanocomposite films from stable colloidal suspensions containing aluminium nitrate salts were also designed using an electrodeposition process. The simultaneous formation of Al metallic inclusions in the BaTiO~3~ nanoparticles in the PMMA matrix significantly improved the dielectric constant of nanocomposite films.
HRTEM micrographs of BaTiO~3~ (240 nm)/PMMA and magnified view of BaTiO~3~ (50 nm)/PMMA/Al(NO~3~)~3~βΒ·β9H~2~O composite particles in each suspension, and FESEM micrograph of electrodeposited threeβphase nanocomposite film.
magnified imageHRTEM micrographs of BaTiO~3~ (240 nm)/PMMA and magnified view of BaTiO~3~ (50 nm)/PMMA/Al(NO~3~)~3~βΒ·β9H~2~O composite particles in each suspension, and FESEM micrograph of electrodeposited threeβphase nanocomposite film.