Room Temperature Synthesis of Ferroelectric Barium Titanate Nanoparticles Using Peptide Nanorings as Templates


  • This work was supported by the U.S. Department of Energy (DE-FG-02-01ER45935) and the National Science Foundation CARRER Award (ECS-0103430). Hunter College infrastructure is supported by the National Institutes of Health and the RCMI program (G12-RR-03037). N. Nuraje and K. Su contributed equally to this work.


original image

Tetragonal ferroelectric BaTiO3 nanoparticles are hydrolyzed inside peptide-ring templates at room temperature and pressure (see figure). The sizes of the monodisperse BaTiO3 nanoparticles are controlled between 6 and 12 nm by varying the cavity size of the nanorings as a function of pH. The nanoparticles possess switching behavior under the influence of external electric fields.