Ferroelectric nanoshell devices
AssigneeDrexel University
InventorsJonathan E Spanier, Stephen S Nonnenmann, Oren David Leaffer
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Abstract
Disclosed herein are nanoscale devices comprising one or more ferroelectric nanoshells characterized as having an extreme curvature in at least one spatial dimension. Also disclosed are ferroelectric field effect transistors and metal ferroelectric metal capacitors comprising one or more ferroelectric nanoshells. Methods for controlling spontaneous ferroelectric polarization in nanoshell devices are also disclosed.
Claims20
A method for controlling spontaneous ferroelectric polarization in a nanoshell device comprising:
- applying a voltage via one or more electrodes to switch the spontaneous ferroelectric polarization of a nanoshell device,
- the nanoshell device comprising an inner nanoshell surface having a radius of curvature in the range of from about 3 nm to about 300 nm,
- an outer nanoshell surface having a radius of curvature in the range of from about 5 nm to about 500 nm,
- a thickness between said inner nanoshell surface and said outer nanoshell surface in the range of from greater than about 1 nm to less than about 100 nm, and
- wherein the ferroelectric nanoshell is characterized as being ferroelectric, ferromagnetic, or both.
A nanoscale device, comprising:
- one or more electrodes;
- and
- one or more nanoshells comprising a ferroelectric material, the one or more nanoshells being characterized as comprising:
- an inner nanoshell;
- and
- an outer nanoshell surface having a radius of curvature in the range of from about 5 nm to about 500 nm,
- the thickness between said inner nanoshell surface and said outer nanoshell surface being in the range of from greater than about 1 nm to less than about 100 nm;
- and
- wherein the ferroelectric material is characterized as being ferroelectric, ferromagnetic, or both.
A ferroelectric field effect transistor, comprising:
- a source;
- and
- a drain, wherein said source and drain are capable of providing an electric field to a ferroelectric nanoshell;
- and
- a gate, wherein the gate is disposed on the ferroelectric nanoshell;
- and
- one or more nanoshells comprising a ferroelectric material, the one or more nanoshells being characterized as comprising:
- an inner nanoshell surface;
- and
- an outer nanoshell surface having a radius of curvature in the range of from about 5 nm to about 500 nm, and
- the thickness between said inner nanoshell surface and said outer nanoshell surface in the range of from greater than about 1 nm to less than about 100 nm;
- and
- wherein the ferroelectric nanoshell is characterized as being ferroelectric, ferromagnetic, or both.
A metal ferroelectric metal device, comprising:
- one or more electrodes;
- and
- one or more nanoshells comprising a ferroelectric material, the one or more nanoshells being characterized as comprising:
- an inner nanoshell surface;
- and
- an outer nanoshell surface,
- the thickness between said inner nanoshell surface and said outer nanoshell surface being in the range of from greater than about 1 nm to less than about 100 nm;
- and
- wherein the nanoshell inner and outer surfaces are situated adjacent to the two or more electrodes;
- and
- wherein the ferroelectric material is characterized as being ferroelectric, ferromagnetic or both.
Dependencies are inferred from the claim text.