Coating processes – Magnetic base or coating
Reexamination Certificate
2007-05-29
2007-05-29
Bashore, Alain L. (Department: 1762)
Coating processes
Magnetic base or coating
C427S011000, C427S256000, C427S258000, C427S261000, C427S265000, C427S269000, C427S287000, C101S450100, C101S483000, C101S491000, C250S306000, C250S310000, C250S311000
Reexamination Certificate
active
10663976
ABSTRACT:
A direct-write method for fabricating magnetic nanostructures, including hard magnetic nanostructures of barium hexaferrite, BaFe, based on nanolithographic printing and a sol-gel process. This method utilizes a conventional atomic force microscope tip, coated with a magnetic material precursor solution, to generate patterns that can be post-treated at elevated temperature to generate magnetic features consisting of barium ferrite in its hexagonal magnetoplumbite (M-type) structure. Features ranging from several hundred nm down to below 100 nm were generated and studied using AFM, magnetic force microscopy, and X-ray photoelectron spectroscopy. The approach offers a new way for patterning functional inorganic magnetic nanostructures with deliberate control over feature size and shape, as well as interfeature distance and location.
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Dravid Vinayak P.
Fu Lei
Liu Xiaogang
Mirkin Chad A.
Bashore Alain L.
Foley & Lardner LLP
Northwestern University
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