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US 6,972,046 B2Granted
Process of forming magnetic nanocomposites via nanoparticle self-assembly
AssigneesInternational Business Machines Corporation, Louisiana Tech University
InventorsShouheng Sun, Hao Zeng
Life of this patent
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Abstract
A process of forming a hard-soft phase, exchange-coupled, magnetic nanocomposite includes forming a dispersion of magnetic nanoparticles, separating the magnetic nanoparticles from a solvent of the dispersion so as to allow self-assembly of the magnetic nanoparticles, and removing a coating from the nanoparticles, which are disposed in a self-assembled, locally-ordered nanostructure.
Claims28
A process of forming a multi-component nanoparticle self-assembly, comprising:
- forming a first dispersion including nanoparticles of a first component;
- forming a second dispersion including nanoparticles of a second component;
- mixing the first and the second dispersions to form a mixed dispersion;
- and
- removing a solvent from the mixed dispersion,
- wherein removing the solvent results in a self-assembly of the nanoparticles of the first and the second components in a locally-ordered nanostructure, and
- wherein the nanoparticles of the first component and the nanoparticles of the second component are surrounded by a coating that prevents agglomeration of the nanoparticles in the first, the second, and the mixed dispersions.
4 more elements
A process of forming a core-shell structured nanoparticle self-assembly, comprising:
- forming a dispersion including core-shell structured nanoparticles;
- and
- removing a solvent from the dispersion,
- wherein removing the solvent results in a self-assembly of the core-shell structured nanoparticles in a locally-ordered nanostructure, and
- wherein said nanoparticles comprise soft core, hard shell, core-shell structured nanoparticle having a soft core diameter comparable to a domain wall width of a hard phase in an exchange-coupled, magnetic nanocomposite, which is about 10 mn to about 20 nm.
2 more elements
A process of forming a core-shell structured nanoparticle self-assembly, comprising:
- forming a dispersion including core-shell structured nanoparticles;
- and
- removing a solvent from the dispersion,
- wherein removing the solvent results in a self-assembly of the core-shell structured nanoparticles in a locally-ordered nanostructure, and
- wherein said nanoparticle comprises hard core, soft shell, core-shell structured nanoparticles having a soft shell with a thickness comparable to a domain wall width of a hard phase in an exchange-coupled, magnetic nanocomposite which is about 10 nm to about 20 nm.
2 more elements
A process of forming an exchange-coupled magnetic nanocomposite, comprising:
- forming a multi-component nanoparticle self-assembly, comprising:
- forming a first dispersion including nanoparticles of a first component;
- forming a second dispersion including nanoparticles of a second component;
- mixing the first and the second dispersions to form a mixed dispersion;
- and
- removing a solvent from the mixed dispersion, wherein removing the solvent results in a self-assembly of the nanoparticles of the first and the second components in a locally-ordered nanostructure;
- and
- removing a coating from a plurality of magnetic nanoparticles that are disposed in a self-assembled, locally-ordered nanostructure to form a hard-soft, exchange-coupled nanocomposite.
5 more elements
A process of forming an exchange-coupled magnetic nanocomposite, comprising:
- forming a core-shell structured nanoparticle self-assembly, comprising:
- forming a dispersion including core-shell structured nanoparticles;
- and
- removing a solvent from the dispersion, wherein said removing the solvent results in a self-assembly of the core-shell structured nanoparticles in a locally-ordered nanostructure;
- and
- removing a coating from a plurality of magnetic nanoparticles that are disposed in a self-assembled, locally-ordered nanostructure to form a hard-soft, exchange-coupled nanocomposite.
3 more elements
A process of forming a multi-component nanoparticle self-assembly, comprising:
- forming a first dispersion including nanoparticles of a first component;
- forming a second dispersion including nanoparticles of a second component;
- mixing the first and the second dispersions to form a mixed dispersion;
- removing a solvent from the mixed dispersion, wherein said removing the solvent results in a self-assembly of the nanoparticles of the first and the second components in a locally-ordered nanostructure, and
- coating said nanoparticles of said first component and said nanoparticles of said second component with a coating material to inhibit agglomeration,
- wherein said removing said solvent from said mixed dispersion comprises adding a material to separate said nanoparticles of said first component and nanoparticles of said second component from said solvent via precipitation by interaction of said added material with said coating material.
3 more elements
A process of forming a multi-component nanoparticle self-assembly, comprising:
- forming a first dispersion including nanoparticles of a first component;
- forming a second dispersion including nanoparticles of a second component;
- mixing the first and the second dispersions to form a mixed dispersion;
- and
- removing a solvent from the mixed dispersion, wherein said removing the solvent results in a self-assembly of the nanoparticles of the first and the second components in a locally-ordered nanostructure,
- wherein said nanoparticles of said first component and said nanoparticles of said second component self-assemble to provide a local ordering such that one of said nanoparticles of said first component is surrounded by a plurality of said nanoparticles of said second component.
3 more elements
Dependencies are inferred from the claim text.