Vladimir P Oleshko

US Patent:

20100294049, Nov 25, 2010

Filed:

May 22, 2009

Appl. No.:

12/471095

Inventors:

Tracy Earl Kelley - Tucson AZ, US
John D. May - Marana AZ, US
Vladimir Oleshko - Tucson AZ, US

Assignee:

SION POWER CORPORATION - Tucson AZ

International Classification:

G01N 1/00
B01L 3/00

US Classification:

7386483, 7386491

Abstract:

A hermetic sample holder for use in performing microanalysis of a sample under a controlled atmosphere environment. The sample holder comprises a sample holder body with a sample cavity to receive the sample and a cover movably mounted to the holder body between an open position to allow access to the cavity and a closed position to seal the cavity. The cover is secured in and released from the closed position at least in part by a pressure differential between the cavity and the ambient atmosphere. The cover may be biased toward the open position. The cover may be pivotally mounted about an axis that is perpendicular to a sealing surface of the cover and/or movable in a direction along the pivot axis. A valve may be provided to allow direct evacuation of the cavity to create a pressure differential. An adjustable clamp may be located in the cavity to secure the sample.

US Patent:

20110076560, Mar 31, 2011

Filed:

Aug 24, 2010

Appl. No.:

12/862581

Inventors:

Yuriy V. Mikhaylik - Tucson AZ, US
Igor Kovalev - Vail AZ, US
Vladimir Oleshko - Tucson AZ, US
Christopher T.S. Campbell - Tucson AZ, US
John D. Affinito - Tucson AZ, US

Assignee:

Sion Power Corporation - Tucson AZ

International Classification:

H01M 4/58

US Classification:

4292181

Abstract:

The present invention relates to the use of porous structures comprising sulfur in electrochemical cells. Such materials may be useful, for example, in forming one or more electrodes in an electrochemical cell. For example, the systems and methods described herein may comprise the use of an electrode comprising a conductive porous support structure and a plurality of particles comprising sulfur (e.g., as an active species) substantially contained within the pores of the support structure. The inventors have unexpectedly discovered that, in some embodiments, the sizes of the pores within the porous support structure and/or the sizes of the particles within the pores can be tailored such that the contact between the electrolyte and the sulfur is enhanced, while the electrical conductivity and structural integrity of the electrode are maintained at sufficiently high levels to allow for effective operation of the cell. Also, the sizes of the pores within the porous support structures and/or the sizes of the particles within the pores can be selected such that any suitable ratio of sulfur to support material can be achieved while maintaining mechanical stability in the electrode. The inventors have also unexpectedly discovered that the use of porous support structures comprising certain materials (e.g., metals such as nickel) can lead to relatively large increases in cell performance. In some embodiments, methods for forming sulfur particles within pores of a porous support structure allow for a desired relationship between the particle size and pore size. The sizes of the pores within the porous support structure and/or the sizes of the particles within the pores can also be tailored such that the resulting electrode is able to withstand the application of an anisotropic force, while maintaining the structural integrity of the electrode.

US Patent:

20190033277, Jan 31, 2019

Filed:

Oct 4, 2018

Appl. No.:

16/151399

Inventors:

- College Park MD, US
- Gaithersburg MD, US
- Fairfax VA, US
- Washington DC, US
Vladimir P. OLESHKO - Gaithersburg MD, US
Ritu BAJPAI - Santa Clara CA, US
Mona E. ZAGHLOUL - Bethesda MD, US

International Classification:

G01N 33/00
G01N 27/12

Abstract:

A nanostructure sensing device comprises a semiconductor nanostructure having an outer surface, and at least one of metal or metal-oxide nanoparticle clusters functionalizing the outer surface of the nanostructure and forming a photoconductive nanostructure/nanocluster hybrid sensor enabling light-assisted sensing of a target analyte.

US Patent:

20180172655, Jun 21, 2018

Filed:

Feb 8, 2018

Appl. No.:

15/891699

Inventors:

- College Park MD, US
- Gaithersburg MD, US
- Fairfax VA, US
- Washington DC, US
Vladimir P. OLESHKO - Gaithersburg MD, US
Ritu BAJPAI - Santa Clara CA, US
Mona E. ZAGHLOUL - Bethesda MD, US

International Classification:

G01N 33/00
G01N 27/12

Abstract:

A nanostructure sensing device comprises a semiconductor nanostructure having an outer surface, and at least one of metal or metal-oxide nanoparticle clusters functionalizing the outer surface of the nanostructure and forming a photoconductive nanostructure/nanocluster hybrid sensor enabling light-assisted sensing of a target analyte.

US Patent:

20180172656, Jun 21, 2018

Filed:

Feb 8, 2018

Appl. No.:

15/891709

Inventors:

- College Park MD, US
- Gaithersburg MD, US
- Fairfax VA, US
- Washington DC, US
Vladimir P. OLESHKO - Gaithersburg MD, US
Ritu BAJPAI - Santa Clara CA, US
Mona E. ZAGHLOUL - Bethesda MD, US

International Classification:

G01N 33/00
G01N 27/12

Abstract:

A nanostructure sensing device comprises a semiconductor nanostructure having an outer surface, and at least one of metal or metal-oxide nanoparticle clusters functionalizing the outer surface of the nanostructure and forming a photoconductive nanostructure/nanocluster hybrid sensor enabling light-assisted sensing of a target analyte.

US Patent:

20170038326, Feb 9, 2017

Filed:

Oct 19, 2016

Appl. No.:

15/297693

Inventors:

- College Park MD, US
- Gaithersburg MD, US
- Fairfax VA, US
Vladimir P. Oleshko - Gaithersburg MD, US
Ritu Bajpai - Santa Clara CA, US
Mona E. Zaghloul - Bethesda MD, US

Assignee:

University of Maryland, College Park - College Park MD
United States of America, as Represented by the Secretary of Commerce - Gaithersburg MD
George Mason University - Fairfax VA
The George Washington University - Washington DC

International Classification:

G01N 27/16
G01N 33/00

Abstract:

A nanostructure sensing device comprises a semiconductor nanostructure having an outer surface, and at least one of metal or metal-oxide nanoparticle clusters functionalizing the outer surface of the nanostructure and forming a photoconductive nanostructure/nanocluster hybrid sensor enabling light-assisted sensing of a target analyte.

US Patent:

20150268207, Sep 24, 2015

Filed:

Apr 12, 2013

Appl. No.:

13/861962

Inventors:

University of Maryland, College Park - , US
United States of America, as Represented by the Secretary of Commerce - , US
George Mason University - , US
The George Washington University - , US
Vladimir P. Oleshko - Gaithersburg MD, US
Ritu Bajpai - Santa Clara CA, US
Mona E. Zaghloul - Bethesda MD, US

International Classification:

G01N 33/00

Abstract:

A nanostructure sensing device comprises a semiconductor nanostructure having an outer surface, and at least one of metal or metal-oxide nanoparticle clusters functionalizing the outer surface of the nanostructure and forming a photoconductive nanostructure/nanocluster hybrid sensor enabling light-assisted sensing of a target analyte.

US Patent:

20140183356, Jul 3, 2014

Filed:

Jul 21, 2006

Appl. No.:

11/490952

Inventors:

Mihai G.M. Pop - Lynchburg VA, US
Brian Glenn Lockamon - Evington VA, US
Vladimir Oleshko - Phoenix AZ, US
James Howe - Earlysville VA, US

International Classification:

G01N 23/225

US Classification:

250307

Abstract:

A method to analyze crystals in a deposit on a surface of a nuclear generating station heating surface, wherein the method extracts a sample of material from the surface of the nuclear generating station heating surface and also includes conducting at least one of a high resolution scanning electron microscope/energy dispersive X-ray spectrometry of the sample and a scanning transmission electron microscope/selected area electron diffraction/spot and elemental mapping analysis of the sample.