Jeffrey C Grossman

US Patent:

6939524, Sep 6, 2005

Filed:

Mar 3, 2000

Appl. No.:

09/518989

Inventors:

Charles R. Piskoti - Fenton MI, US
Alex K. Zettl - Kensington CA, US
Marvin L. Cohen - Piedmont CA, US
Michel Cote - Cambridge, GB
Jeffrey C. Grossman - Berkeley CA, US
Steven G. Louie - Berkeley CA, US

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

C01B031/00

US Classification:

423445B, 977DIG 1

Abstract:

A solid phase or form of carbon is based on fullerenes with thirty six carbon atoms (C). The Cstructure with Dsymmetry is one of the two most energetically favorable, and is conducive to forming a periodic system. The lowest energy crystal is a highly bonded network of hexagonal planes of Csubunits with AB stacking. The Csolid is not a purely van der Waals solid, but has covalent-like bonding, leading to a solid with enhanced structural rigidity. The solid Cmaterial is made by synthesizing and selecting out Cfullerenes in relatively large quantities. A Crich fullerene soot is produced in a helium environment arc discharge chamber by operating at an optimum helium pressure (400 torr). The Cis separated from the soot by a two step process. The soot is first treated with a first solvent, e. g. toluene, to remove the higher order fullerenes but leave the C.

US Patent:

7107430, Sep 12, 2006

Filed:

Nov 14, 2001

Appl. No.:

09/990798

Inventors:

Jeffrey P. Grossman - Cambridge MA, US
Jeremy H. Brown - Somerville MA, US
Andrew W Huang - Cambridge MA, US

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

G06F 12/00

US Classification:

711202, 711216, 711220, 707 1, 707206, 707205, 707200, 707101, 707 10

Abstract:

Short-quasi-unique-identifiers (SQUIDs) are generated and assigned to the data objects stored in memory. Pointers to a particular data object contain the data object's assigned SQUID. If a data object is moved to a second allocated memory segment, a new pointer to the second allocated memory segment is placed at the original memory segment, so that any pointers to the original memory segment now point to the new pointer. The distribution of SQUIDs is uniform. SQUIDs can be generated by counting, generated randomly, generating through some hashing mechanism, or other means. In comparing two different pointers, it is determined that the two pointers do not reference the same data object if the SQUIDs are different. On the other hand, if the SQUIDs are identical and the address fields of the two pointers are identical, then the two pointers reference the same data object. In addition, a pointer is associated with a migration indicator field which indicates the number of migrations of the referenced data object prior to the pointer being created.

US Patent:

7915973, Mar 29, 2011

Filed:

Aug 25, 2006

Appl. No.:

11/467422

Inventors:

Alex K. Zettl - Kensington CA, US
Kenneth J. Jensen - Berkeley CA, US
Caglar Girit - Albany CA, US
William E. Mickelson - San Francisco CA, US
Jeffrey C. Grossman - Berkeley CA, US

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

H03H 9/24

US Classification:

333186, 333197, 977752

Abstract:

A tunable nanoscale resonator has potential applications in precise mass, force, position, and frequency measurement. One embodiment of this device consists of a specially prepared multiwalled carbon nanotube (MWNT) suspended between a metal electrode and a mobile, piezoelectrically controlled contact. By harnessing a unique telescoping ability of MWNTs, one may controllably slide an inner nanotube core from its outer nanotube casing, effectively changing its length and thereby changing the tuning of its resonance frequency. Resonant energy transfer may be used with a nanoresonator to detect molecules at a specific target oscillation frequency, without the use of a chemical label, to provide label-free chemical species detection.

US Patent:

8567249, Oct 29, 2013

Filed:

Aug 18, 2009

Appl. No.:

12/543359

Inventors:

Jeffrey C. Grossman - Berkeley CA, US
Alexander K. Zettl - Kensington CA, US

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

G01H 13/00

US Classification:

73579, 977902

Abstract:

An embodiment of a nanomechanical frequency detector includes a support structure and a plurality of elongated nanostructures coupled to the support structure. Each of the elongated nanostructures has a particular resonant frequency. The plurality of elongated nanostructures has a range of resonant frequencies. An embodiment of a method of identifying an object includes introducing the object to the nanomechanical resonance detector. A resonant response by at least one of the elongated nanostructures of the nanomechanical resonance detector indicates a vibrational mode of the object. An embodiment of a method of identifying a molecular species of the present invention includes introducing the molecular species to the nanomechanical resonance detector. A resonant response by at least one of the elongated nanostructures of the nanomechanical resonance detector indicates a vibrational mode of the molecular species.

US Patent:

8573031, Nov 5, 2013

Filed:

Feb 11, 2011

Appl. No.:

13/026122

Inventors:

Kenneth J. Jensen - Berkeley CA, US
Caglar O. Girit - Saint Cloud, FR
William E. Mickelson - San Francisco CA, US
Alexander K. Zettl - Kensington CA, US
Jeffrey C. Grossman - Brookline MA, US

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

G01H 13/00
G01N 29/02

US Classification:

73 2406, 73 2401, 977957

Abstract:

A tunable nanoscale resonator has potential applications in precise mass, force, position, and frequency measurement. One embodiment of this device consists of a specially prepared multiwalled carbon nanotube (MWNT) suspended between a metal electrode and a mobile, piezoelectrically controlled contact. By harnessing a unique telescoping ability of MWNTs, one may controllably slide an inner nanotube core from its outer nanotube casing, effectively changing its length and thereby changing the tuning of its resonance frequency. Resonant energy transfer may be used with a nanoresonator to detect molecules at a specific target oscillation frequency, without the use of a chemical label, to provide label-free chemical species detection.

US Patent:

20110226330, Sep 22, 2011

Filed:

Aug 11, 2009

Appl. No.:

13/058992

Inventors:

Jeffrey C. Grossman - Brookline MA, US
Alexander K. Zettl - Kensington CA, US
Lucas Wagner - Somerville MA, US

Assignee:

THE REGENTS OF THE UNIVERSITY OF CALIFORNIA - Oakland CA

International Classification:

H01L 31/0384
H01L 31/20
H01L 51/42
H01B 1/04
B82Y 99/00
B82Y 30/00
B82Y 40/00

US Classification:

136258, 438 96, 2525011, 257E31048, 977948, 977700, 977742, 977840

Abstract:

The present invention provides novel strategies for mitigating the Staebler-Wronski Effect (SWE), that is, the light induced degradation in performance of photoconductivity in amorphous silicon. Materials according to the present invention include alloys or composites of amorphous silicon which affect the elasticity of the materials, amorphous silicon that has been grown on a flexed substrate, compression sandwiched comprising amorphous silicon, and amorphous silicon containing nanoscale features that allow stress to be relieved. The composites are formed with nanoparticles such as nanocrystals and nanotubes. Preferred are boron nitride nanotubes (BNNT) including those that have been surface modified.

US Patent:

20110247676, Oct 13, 2011

Filed:

Sep 28, 2009

Appl. No.:

13/121667

Inventors:

Jeffrey C. Grossman - Brookline MA, US
Alexander K. Zettl - Kensington CA, US

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

H01L 31/02
H01L 31/042
H01L 31/18
H01L 31/0264

US Classification:

136244, 136252, 136261, 136260, 438 72, 257E31128

Abstract:

The present invention provides a photovoltaic cell, which is contained within a photonic crystal structure. The photonic crystal is at least two-dimensional, and contains defects to guide incident light, e.g., sunlight, into a crystal cavity, where the concentrated light is guided into a cavity, preferably a photonic optical cavity, which is also a photovoltaic region comprising a semiconductor heterojunction for forming a photovoltaic current.

US Patent:

20110253205, Oct 20, 2011

Filed:

Sep 25, 2009

Appl. No.:

13/121174

Inventors:

Jeffrey C. Grossman - Brookline MA, US
Alexander K. Zettl - Kensington CA, US

International Classification:

H01L 51/46
H01L 31/06
H01L 31/02
B82Y 99/00

US Classification:

136255, 438 88, 257E3111, 977762, 977742, 977948

Abstract:

The present disclosure is directed to an optimized structure for an exciton-based photovoltaic cell, in which the bulk heterojunction between the electron donor (typically an organic polymeric semiconductor) and an electron acceptor (e.g., silicon or titanium or titania) minimizes the necessary exciton travel distance to the heterojunction in three dimensions. The configuration is arrayed in three dimensions, such that one member of the heterojunction pair, such as the electron acceptor is in the form of a number of nanoscale channels, extending to an electrode. The channels extend through a photovoltaic matrix material in a predetermined three-dimensional configuration.