Jackie Y Ying

6359288, Mar 19, 2002

Apr 22, 1998

09/064242

Jackie Y. Ying - Winchester MA
Zhibo Zhang - Cambridge MA
Lei Zhang - Cambridge MA
Mildred S. Dresselhaus - Arlington MA

Massachusetts Institute of Technology - Cambridge MA

H01L 2915

257 14, 257 9, 257 28, 205202, 428606, 428614, 428629, 4284722

An array of nanowires having a relatively constant diameter and techniques and apparatus for fabrication thereof are described. In one embodiment, a technique for melting a material under vacuum and followed by pressure injection of the molten material into the pores of a porous substrate produces continuous nanowires. In another embodiment, a technique to systematically change the channel diameter and channel packing density of an anodic alumina substrate includes the steps of anodizing an aluminum substrate with an electrolyte to provide an anodic aluminum oxide film having a pore with a wall surface composition which is different than aluminum oxide and etching the pore wall surface with an acid to affect at least one of the surface properties of the pore wall and the pore wall composition.

6413489, Jul 2, 2002

Apr 15, 1998

09/060733

Jackie Y. Ying - Winchester MA
Andrey Zarur - Cambridge MA

Massachusetts Institute of Technology - Cambridge MA

C01F 716

423600, 516 22, 516 33, 501 12, 501125, 502104, 502108, 502132

The present invention relates to a method of producing particles having a particle size of less than 100 nm and surface areas of at least 20 m /g where the particles are free from agglomeration. The method involves synthesizing the particles within an emulsion having a 1-40% water content to form reverse micelles. In particular, the particles formed are metal oxide particles. The particles can be used to oxidize hydrocarbons, particularly methane.

6489258, Dec 3, 2002

Oct 15, 1999

09/419365

Jackie Y. Ying - Winchester MA
Christian P. Mehnert - Clinton NJ

Massachusetts Institute of Technology - Cambridge MA

B01J 3116

502 60, 502 64, 502 72, 585657, 585659, 560 92, 560217

This invention provides an article, compositions, methods of making and uses of vapor-deposited metal compounds immobilized on porous substrates. The substrate is a porous substrate having an average pore size of at least about 8 and a surface area of at least about 10 m /g. The methods describe the vapor-deposition of an inorganic compound onto the substrate where the deposition is accomplished with a relatively small amount of ligand loss. The substrate can be pre-treated to achieve a uniformly dispersed metal compound deposited on the substrate. The inorganic compound can decompose into a metal compound. The article can also function as a catalyst for carbon-heteroatom coupling reactions such as carbon-carbon coupling reactions, most notably, the Heck reaction.

6544923, Apr 8, 2003

Aug 25, 2000

09/648928

Jackie Y. Ying - Winchester MA
Christian P. Mehnert - Clinton NJ
John S. Lettow - McLean VA
Dejian Huang - Watertown MA

Massachusetts Institute of Technology - Cambridge MA

B01J 3100

502159, 502152

The present invention provides a novel catalytic system comprising catalysts immobilized on ultra-large mesoporous compositions, and particularly compositions having a large percentage of pores with a mean diameter of at least about 50. Catalysts, such as organometallic complexes can reside in these pores to effect catalytic reactions. Such compositions include silicates covalently bound to a ligand that in turn can covalently bind an organometallic fragment. For asymmetric organometallic catalysts, the catalyst is bound to the mesoporous composition via an achiral ligand. The catalytic reactions include hydrogenation, hydroformylation, carbonylation and carbon-carbon coupling reactions, such as Heck or Suzuki reactions. The present invention provides catalyst for performing asymmetric reactions to achieve products of high stereoselectivities. The present invention also relates to ionically immobilized catalysts.

6767859, Jul 27, 2004

Aug 7, 2002

10/214376

Jackie Y. Ying - Winchester MA
Jinsuo Xu - Springfield NJ

Massachusetts Institute of Technology - Cambridge MA

B01J 2316

502305, 502313

One aspect of the present invention relates to a catalytic compound of anion-modified metal oxides doped with metal ions. Another aspect of the present invention relates to a method of isomerizing an alkane or alkyl moiety.

6869584, Mar 22, 2005

Nov 14, 2001

09/993355

Jackie Y. Ying - Winchester MA, US
Andrey Zarur - Cambridge MA, US

Massachusetts Institute of Technology - Cambridge MA

C01F007/16
C04B035/195
B01J037/00
B01J013/00

423600, 516 22, 516 33, 501 12, 501125, 502132

The present invention relates to a method of producing particles having a particle size of less than 100 nm and surface areas of at least 20 m/g where the particles are free from agglomeration. The method involves synthesizing the particles within an emulsion having a 1-40% water content to form reverse micelles. In particular, the particles formed are metal oxide particles. The particles can be used to oxidize hydrocarbons, particularly methane.

RE39196, Jul 18, 2006

Jan 11, 2002

10/044801

Jackie Y. Ying - Winchester MA, US
Edward S. Ahn - Cambridge MA, US
Atsushi Nakahira - Kyoto, JP

Massachusetts Institute of Technology - Cambridge MA

A61F 2/28
C04B 15/16
C04B 35/01

501 1, 623 2356, 106 35, 424423, 424422, 428689, 428704

Methods for synthesis of nanocyrstalline apatites are presented, as well as a series of specific reaction parameters that can be adjusted to tailor, in specific ways, properties in the recovered product. Particulate apatite compositions having aveage crystal size of less than 150 nm are provided. Products also can have a surface area of at least 40 m/g and can be of high density. Hydroxyapatite material is investigated in particular detail. Compositions of the invention can be used as prosthetic implants and coatings for prosthetic implants.

7211275, May 1, 2007

Jan 13, 2005

11/034217

Jackie Y. Ying - Winchester MA, US

Massachusetts Institute of Technology - Cambridge MA

A61K 9/58

424462, 424457, 424458, 424470, 424482, 514 12

Composite materials comprising a water-soluble compound adsorbed onto a basic inorganic material and a bio-degradable polymer which yields acidic degradation products, methods of producing same, and methods of use thereof are described, wherein the composite materials are designed so as to provide controlled release of the water soluble molecule.