Hydrothermal synthesis of perovskite nanotubes
AssigneeThe Research Foundation of State University of New York
InventorsStanislaus Wong, Yuanbing Mao
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Abstract
A low-temperature hydrothermal reaction is provided to generate crystalline perovskite nanotubes such as barium titanate (BaTiO3) and strontium titanate (SrTiO3) that have an outer diameter from about 1 nm to about 500 nm and a length from about 10 nm to about 10 micron. The low-temperature hydrothermal reaction includes the use of a metal oxide nanotube structural template, i.e., precursor. These titanate nanotubes have been characterized by means of X-ray diffraction and transmission electron microscopy, coupled with energy dispersive X-ray analysis and selected area electron diffraction (SAED).
Claims19
A monophasic perovskite nanotube having an outer diameter from about 1 nm to about 500 nm and a length from about 10 nm to about 10 μm.
A monophasic nanotube comprising a perovskite having the formula ATiO3 wherein A is Sr, Ba or a mixture thereof, said nanotube having an outer diameter from about 1 nm to about 500 nm and a length from about 10 nm to about 10 μm.
A method of fabricating a perovskite nanotube comprising the steps of:
- providing a metal oxide nanotube structural template comprising a metal selected from Group IVB, VB, VIB, VIIB, VIIIB, IB or IIB of the Periodic Table of Elements;
- adding, in the absence of air, and CO2, at least one precursor compound comprising a cation having a positive formula charge of from 1 to 3 to said nanotube structural template to provide a reaction mixture;
- refluxing the reaction mixture in an inert atmosphere at a temperature of about 150° C. or less to provide a suspension of perovskite nanotubes;
- and
- recovering the perovskite nanotubes from the suspension.
Dependencies are inferred from the claim text.