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Hierarchically Ordered Porous Oxides

Technology Application: Fuel cell membranesElectronic and magnetic devices

Detailed Technology Description: Background:Currently, several approaches are available for the preparation of ordered structures at different length scales, most notably the nanoscale. Despite a wide variety of efforts in nanostructuring materials, the fabrication of hierarchically ordered structures at multiple length scales has remained an experimental challenge. Hierarchically ordered structures can be observed in some natural systems, such as diatoms, and materials of this nature are important for the study of structure-property relations as well as applications in various technologies. Previously, micromolding has been used to form patterned mesoporous materials, but these studies used acidic aqueous conditions to carry out the self-assembly of materials, which lead to limited processibility as well as the formation of non-continuous films. Description:Researchers at the University of California, Santa Barbara have developed a low-cost, efficient method of preparing hierarchically ordered materials using non-toxic and biodegradable block copolymers. Porous silica, niobia, and titania are prepared by combining micromolding, latex sphere templating, and cooperative assembly of inorganic specices with amphilphilic block copolymers. The resulting materials show hierarchical ordering over several discrete and tunable length scales ranging from about 10 nm to several micrometers. Such materials are important both for systematic fundamental study of structure-property relationships and for their technological promise in applications such as catalysis, sensor arrays, waveguides, miniaturized electronic and magnetic devices, and photonic crystals with tunable band gaps.

Supplementary Information: Patent Number: US6541539B1
Application Number: US1999432920A
Inventor: Yang, Peidong | Deng, Tao | Whitesides, George M. | Stucky, Galen | Zhao, Dongyaun | Chmelka, Bradley | Pine, David | Feng, Pingyun
Priority Date: 4 Nov 1998
Priority Number: US6541539B1
Application Date: 2 Nov 1999
Publication Date: 1 Apr 2003
IPC Current: C04B0035622 | C04B0035624 | C04B003800
US Class: 523200 | 523201 | 523204
Assignee Applicant: President and Fellows of Harvard Collegembridge | The Regents of the University of California,Oakland
Title: Hierarchically ordered porous oxides
Usefulness: Hierarchically ordered porous oxides
Summary: For forming multi-scale mesoscopically structured material that is used in the fields of catalysis, molecular separation, fuel cells, sensor arrays, waveguides, miniature electronic and magnetic devices, and photonic crystals with tunable band gaps.
Novelty: Formation of multi-scale mesoscopically structured material involves combining an amphiphilic block copolymer with an inorganic metal, applying pressure to the combination, and polymerizing the material

Industry: Chemical/Material

Sub Category: Fuel Cell

Application No.: 6541539

Others

Additional Technologies by these Inventors

Tech ID/UC Case

19996/1999-072-0

Related Cases

1999-072-0, 2001-009-2, 2004-049-2, 2006-256-2, 2006-477-2, 2008-414-2, 2008-463-2, 2008-465-1

*Abstract: A low-cost, efficient method of preparing hierarchically ordered materials using non-toxic and biodegradable block copolymers.

*IP Issue Date: Apr 1, 2003

*Principal Investigator: Name: Bradley Chmelka
Department:

Name: Tao Deng
Department:

Name: Pingyun Feng
Department:

Name: David Pine
Department:

Name: Galen Stucky
Department:

Name: George Whitesides
Department:

Name: Peidong Yang
Department:

Name: Dongyuan Zhao
Department:

Country/Region: USA

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