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Shape Controlled Ferroelectric Barium Titanate (BaTiO3) Nanocrystals
Category(s):
For Information, Contact:
Craig Forney
Commercialization Manager, Chemistry and Materials Sciences
515-294-4740
licensing@iastate.edu
Web Published:
5/14/2015
ISURF #
3758
Summary:
Iowa State University researchers have developed a method for producing nanoscale ferroelectric modules for the fabrication of electronic devices.

Development Stage:
Samples of the shape controlled BaTiO3 nanocrystals are available for testing, and ISU is seeking partners interested in commercializing this technology.

Description:
Perovskite-type mixed metal oxide materials with general formula of ABO3, of which barium titanate (BaTiO3) is the most studied, have received tremendous research attention in the past decades due to their unique ferroelectric, catalytic, sensing, superconducting, and optical properties for use in thin-film capacitors, pyroelectric detectors, electrooptic modulators, transducers, actuators, optical memories, and nonlinear optics.  Similar to the trend seen with miniaturization conventional semiconductor devices, it is necessary to control the size and shape of BaTiO3 nanostructures used as building blocks for nanodevices.  While various approaches have been explored for the synthesis of BaTiO3 nanocrystals, such as injection-hydrolysis, thermal decomposition, and peptide assisted precipitation, none to date have enable shape control.  To overcome this limitation, ISU researchers have developed a one-pot non-hydrolytic approach for shape controlled synthesis of ferroelectric BaTiO3 nanocrystals.  By tuning the molar ratio between the surfactant and metal precursors, BaTiO3 nanocrystals with different shapes, such as nanoparticles, nanorods, and nanowires, can be obtained.  These nanocrystals may have utility as nanoscale modules for the assembly of various electronic devices, such as sensors, detectors, capacitors, etc; in addition, BaTiO3 nanocrystals can also be used in multifunctional structural capacitors (where material elements simultaneously carry load and store energy) and related structural sensors.

Advantage:
• Simple (uses one-pot, non-hydrolytic synthesis approach)
• Effective (enables synthesis of well controlled shapes)
• Versatile (shape controlled nanocrystals have utility for assembly of a variety of electronic devices)
Application:
Electronic devices

Patent Information:
*To see the full version of the patent(s), follow the link below, then click on "Images" button.
Country Serial No. Patent No. Issued Date
United States 13/171,021 9,051,180* 6/9/2015


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