COLL 167 |
| Yuanbing Mao, Department of Chemistry, SUNY at Stony Brook, Stony Brook, NY 11794, Sarbajit Banerjee, Department of Chemistry, SUNY Stony Brook, Stony Brook, NY 11794-3400, and Stanislaus S. Wong, Department of Chemistry, SUNY at Stony Brook, Stony Brook, NY 11794. |
| Ternary transition metal oxides, including barium titanate and strontium titanate, with a perovskite structure, are noteworthy for their exceptional dielectric, piezoelectric, electrostrictive, pyroelectric, and electro-optic properties. Understanding the behavior of ferroelectric materials at the nanoscale is of importance to the development of molecular electronics, in particular for random access memory and logic circuitry (FRAM). A low-temperature hydrothermal reaction has been utilized to generate crystalline barium titanate and strontium titanate nanotubes. Single-crystalline perovskite nanostructures of reproducible shape have also been prepared using a simple, readily scaleable solid-state reaction in the presence of NaCl and a nonionic surfactant. Pristine barium titanate nanowires have diameters ranging from 50 to 80 nm with an aspect ratio larger than 25. Single-crystalline strontium titanate nanocubes with a mean edge length of 80 nm have been produced using a similar procedure. Extensive characterization of these nanostructures has been performed using SEM, TEM, HRTEM, EDS, and XRD. |
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Nanoscience and Nanotechnology
2:00 PM-5:15 PM, Monday, March 29, 2004 Marriott -- Grand Ballroom J, Oral
Division of Colloid and Surface Chemistry |