Vicinal surfaces of polycrystalline structures
First Claim
1. A polycrystalline material comprising grains, each grain being misoriented with respect to its neighbors, wherein said polycrystalline material comprises misoriented grains throughout its entire thickness and on its surfaces, and wherein at least one surface of the polycrystalline material is a vicinal surface having stepped terraces comprising steps of atomic scale.
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Abstract
The present invention provides vicinal surfaces of polycrystalline materials and a method for their preparation. The method includes the deposition of a polycrystalline material on a substrate followed by removing the material from the substrate so as to expose a vicinal surface having stepped terraces. The step of removing the material from the substrate may be preceded by annealing. The vicinal surfaces are useful for a variety of applications.
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Citations
22 Claims
- 1. A polycrystalline material comprising grains, each grain being misoriented with respect to its neighbors, wherein said polycrystalline material comprises misoriented grains throughout its entire thickness and on its surfaces, and wherein at least one surface of the polycrystalline material is a vicinal surface having stepped terraces comprising steps of atomic scale.
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9. A method of preparing a polycrystalline material comprising grains, each grain being misoriented with respect to its neighbors, wherein said polycrystalline material comprises misoriented grains throughout its entire thickness and on its surfaces, and wherein at least one surface of the polycrystalline material is a vicinal surface having stepped terraces comprising steps of atomic scale, the method comprising the steps of:
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a. depositing a polycrystalline material on a substrate; b. optionally annealing the deposited polycrystalline material on the substrate obtained in step (a); and c. removing the polycrystalline material obtained in step (a) or (b) from the substrate so as to expose a vicinal surface of the polycrystalline material having stepped terraces comprising steps of atomic scale. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A polycrystalline material comprising grains, each grain being misoriented with respect to its neighbors, wherein said polycrystalline material comprises misoriented grains throughout its entire thickness and on its surfaces, wherein at least one surface of the polycrystalline material is a vicinal surface having stepped terraces comprising steps of atomic scale, wherein the material is prepared according to a method comprising the steps of:
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a. depositing a polycrystalline material on a substrate; b. optionally annealing the deposited polycrystalline material on the substrate obtained in step (a); and c. removing the polycrystalline material obtained in step (a) or (b) from the substrate so as to expose a vicinal surface of the polycrystalline material having stepped terraces comprising steps of atomic scale.
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Specification