Jeffrey J Urban

US Patent:

7918935, Apr 5, 2011

Filed:

Jun 19, 2007

Appl. No.:

11/765177

Inventors:

Hongkun Park - Lexington MA, US
Charles M. Lieber - Lexington MA, US
Jeffrey J. Urban - Cambridge MA, US
Qian Gu - Cambridge MA, US
Wan Soo Yun - Somerville MA, US

Assignee:

President and Fellows of Harvard College - Cambridge MA

International Classification:

C30B 29/16

US Classification:

117 68, 117 70, 117 73, 117 74

Abstract:

Nanowires are disclosed which comprise transition metal oxides. The transition metal oxides may include oxides of group II, group III, group IV and lanthanide metals. Also disclosed are methods for making nanowires which comprise injecting decomposition agents into a solution comprising solvents and metallic alkoxide or metallic salt precursors.

US Patent:

20050064731, Mar 24, 2005

Filed:

Jul 22, 2002

Appl. No.:

10/483935

Inventors:

Hongkun Park - Lexington MA, US
Charles Lieber - Lexington MA, US
Jeffrey Urban - Cambridge MA, US
Oian Gu - Cambridge MA, US
Wan Yun - Daejon, KR

International Classification:

H01L023/58
H01L021/00

US Classification:

438800000, 257798000

Abstract:

Nanowires are disclosed which comprise transition metal oxides. The transition metal oxides may include oxides of group II, group III, group IV and lanthanide metals. Also disclosed are methods for making nanowires which comprise injecting decomposition agents into a solution comprising solvents and metallic alkoxide or metallic salt precursors.

US Patent:

20120195823, Aug 2, 2012

Filed:

Jan 30, 2012

Appl. No.:

13/361859

Inventors:

Hoi Ri Moon - Ulsan, KR
Ki-Joon Jeon - Ulsan, KR
Anne M. Ruminski - El Cerrito CA, US
Jeffrey J. Urban - Emeryville CA, US

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

C01B 3/56
B01J 20/26
B01J 20/10
B01J 20/02
B82Y 30/00

US Classification:

4236481, 25218211, 25218232, 25218233, 524560, 524588, 524609, 524 80, 977773, 977902, 977762, 977810

Abstract:

The present invention provides for a composition capable of storing hydrogen from molecular hydrogen. The composition comprises a magnesium nanoparticle (NP) and a polymer, wherein the Mg NC is essentially embedded in the polymer. The polymer is selectively permeable wherein the polymer is essentially not permeable to Oand HO. The composition is capable of absorbing and desorbing molecular hydrogen.

US Patent:

20130084464, Apr 4, 2013

Filed:

Nov 26, 2012

Appl. No.:

13/685505

Inventors:

The Regents of the University of California - Oakland CA, US
Jeffrey J. Urban - Emeryville CA, US
Rachel A. Segalman - Pleasanton CA, US
Nelson E. Coates - Oakland CA, US
Shannon K. Yee - Berkeley CA, US

Assignee:

THE REGENTS OF THE UNIVERSITY OF CALIFORNIA - Oakland CA

International Classification:

H01B 1/12

US Classification:

428626, 252500, 428375, 428379, 977755

Abstract:

The present invention provides for an inorganic nanostructure-organic polymer heterostructure, useful as a thermoelectric composite material, comprising (a) an inorganic nanostructure, and (b) an electrically conductive organic polymer disposed on the inorganic nanostructure. Both the inorganic nanostructure and the electrically conductive organic polymer are solution-processable.

US Patent:

20180126337, May 10, 2018

Filed:

Nov 3, 2017

Appl. No.:

15/803425

Inventors:

Christine M. Beavers - Pleasant Hill CA, US
David K. Britt - El Cerrito CA, US
Norman C. Su - Walnut Creek CA, US
Daniel T. Sun - Sion, CH
Wendy L. Queen - Grimisuat, CH
Jeffrey J. Urban - Emeryville CA, US

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

B01D 67/00
B01D 69/14
B01D 53/22

Abstract:

A hybrid polymer/inorganic membrane with dual transport pathways overcomes traditional limitations. The inorganic phase consists of a metal-organic framework (MOF), which is an ideal inorganic dispersant to construct dual transport pathways as the crystalline porous structure of MOFs is more amenable to molecular diffusion than polymers. Previous hybrid membrane research has failed to achieve sufficiently high loadings to establish a percolative network necessary for dual transport, often due to mechanical failure of the membrane at high loading. Using polysulfone and UiO-66-NHMOF as a model system, we achieve high MOF loadings (50 wt %) and observe the evolution from single mode to dual transport regimes. The newly formed percolative pathway through the MOF acts as a molecular highway for gases. As the MOF loading increases to 30 wt %, COpermeability increases linearly from 5.6 barrers in polysulfone homopolymer to 18 barrers. Crucially, between 30 and 40 wt %, a percolative MOF network arises and the COpermeability dramatically rises from 18 to 46 barrers; an eight-fold increase over pure polysulfone, while maintaining selectivity over methane and nitrogen near the pure polymer at 24 and 26, respectively.

US Patent:

20170338395, Nov 23, 2017

Filed:

Apr 19, 2017

Appl. No.:

15/491054

Inventors:

Edmond W. Zaia - Berkeley CA, US
Madeleine P. Gordon - Berkeley CA, US
Preston Zhou - Fremont CA, US
Boris Russ - Berkeley CA, US
Nelson Coates - Oakland CA, US
Ayaskanta Sahu - Berkeley CA, US
Jeffrey J. Urban - Emeryville CA, US

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

H01L 35/34
C08J 9/26
H01L 35/24

Abstract:

This disclosure provides systems, methods, and apparatus related to thermoelectric polymer aerogels. In one aspect, a method includes depositing a solution on a substrate. The solution comprises a thermoelectric polymer. Solvent of the solution is removed to form a layer of the thermoelectric polymer. The layer is placed in a polar solvent to form a gel comprising the thermoelectric polymer. The gel is cooled to freeze the polar solvent. The gel is placed in a vacuum environment to sublimate the polar solvent from the gel to form an aerogel comprising the thermoelectric polymer.

US Patent:

20170069498, Mar 9, 2017

Filed:

Sep 1, 2016

Appl. No.:

15/254148

Inventors:

Ayaskanta Sahu - Berkeley CA, US
Boris Russ - Berkeley CA, US
Jeffrey J. Urban - Emeryville CA, US
Nelson E. Coates - Oakland CA, US
Rachel A. Segalman - Santa Barbara CA, US
Jason D. Forster - Berkeley CA, US
Miao Liu - Richmond CA, US
Fan Yang - El Cerrito CA, US
Kristin A. Persson - Orinda CA, US
Christopher Dames - Berkeley CA, US

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

H01L 21/228
H01L 29/36
H01L 29/06

Abstract:

This disclosure provides systems, methods, and apparatus related to surface doping of nanostructures. In one aspect a plurality of nanostructures is fabricated with a solution-based process using a solvent. The plurality of nanostructures comprises a semiconductor. Each of the plurality of nanostructures has a surface with capping species attached to the surface. The plurality of nanostructures is mixed in the solvent with a dopant compound that includes doping species. During the mixing the capping species on the surfaces of the plurality of nanostructures are replaced by the doping species. Charge carriers are transferred between the doping species and the plurality of nanostructures.

US Patent:

20170069813, Mar 9, 2017

Filed:

Sep 1, 2016

Appl. No.:

15/254412

Inventors:

Jeffrey J. Urban - Emeryville CA, US
Jared Lynch - Fremont CA, US
Nelson Coates - Oakland CA, US
Jason Forster - Berkeley CA, US
Ayaskanta Sahu - Berkeley CA, US
Michael Chabinyc - Santa Barbara CA, US
Boris Russ - Berkeley CA, US

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

H01L 35/16
H01L 35/02
C09D 5/24
C09D 1/00
C09D 5/26
H01L 35/34
C01B 19/00

Abstract:

This disclosure provides systems, methods, and apparatus related to thermoelectric materials. In one aspect, a method includes providing a plurality of nanostructures. The plurality of nanostructures comprise a thermoelectric material, with each nanostructure of the plurality of nanostructures having first ligands disposed on a surface of the nanostructure. The plurality of nanostructures is mixed with a solution containing second ligands and a ligand exchange process occurs in which the first ligands disposed on the plurality of nanostructures are replaced with the second ligands. The plurality of nanostructures is deposited on a substrate to form a layer. The layer is thermally annealed.