公开(公告)号：US11867775B2

公开(公告)日：2024-01-09

申请号：US17435807

申请日：2020-03-04

Applicant: UNIVERSITY OF MARYLAND, COLLEGE PARK ,  GOVERNMENT OF THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF COMMERCE, NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY

Inventor： Randolph Elmquist ,  Albert Rigosi ,  Mattias Kruskopf

IPC: G01R33/00 ,  G01R33/035 ,  G01R33/07 ,  H10N60/81 ,  H10N60/85

CPC classification number: G01R33/0052 ,  G01R33/035 ,  G01R33/07 ,  H10N60/81 ,  H10N60/85

Abstract: A quantum Hall resistance apparatus is to improve resistance standards and includes a substrate, a graphene epitaxially grown on the substrate and having a plurality of first contact patterns at edges of the graphene, a plurality of contacts, each including a second contact pattern and configured to connect to a corresponding first contact pattern, and a protective layer configured to protect the graphene and to increase adherence between the first contact patterns and the second contact patterns. The contacts become a superconductor at a temperature lower than or equal to a predetermined temperature and under up to a predetermined magnetic flux density.

公开(公告)号：US20230366809A1

公开(公告)日：2023-11-16

申请号：US18024708

申请日：2021-09-04

Applicant: THE REGENTS OF THE UNIVERSITY OF COLORADO, A BODY CORPORATE ,  UNIVERSITY OF CALIFORNIA- SAN DIEGO ,  NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY

Inventor： Justin M. SHAW ,  Thomas J. SILVA ,  Hans Toya NEMBACH ,  Grant A. Riley

IPC: G01N21/17 ,  G01N21/47

CPC classification number: G01N21/1717 ,  G01N21/4738 ,  G01N2021/1727 ,  G01N2201/06113

Abstract: A method for determining at least one property of magnetic matter includes: applying a magnetic field to magnetic matter; directing first light on the magnetic matter at a first set of incident angles; receiving a first set of signatures associated with the first light scattered from the magnetic matter; varying orientation of the magnetic matter with respect to the magnetic field; directing second light on the magnetic matter at a second set of incident angles; receiving a second set of signatures associated with the second light scattered from the magnetic matter; determining, by processing the first set and the second set of signatures according to a dispersion relation, at least one property of the magnetic matter.

公开(公告)号：US11479804B1

公开(公告)日：2022-10-25

申请号：US16236697

申请日：2018-12-31

Applicant: Applied Research Associates, Inc. ,  Government of the United States of America, as represented by the Secretary of Commerce, The National Institute Of Standards And Technology

Inventor： Alyssa Catharyn Henry ,  David Judson Ross

IPC: C12Q1/46 ,  B01L3/00 ,  G01N27/447 ,  C12Q1/527 ,  B01D57/02 ,  G01N30/28

Abstract: Methods of detecting the presence of toxins in a sample using electrophoretic separations and of performing electrophoretic separation of complex samples are provided. The method of detecting the presence of toxins includes reacting a sample and a substrate with a signaling enzyme which converts the substrate to the product in a reaction medium, introducing a run buffer into a separation channel having an inlet end, selectively introducing at least one of the substrate and the product of the reaction medium into the inlet end of the separation channel, electrophoretically separating the substrate and the product, and determining the rate of conversion of the substrate to the product, wherein a change in the rate of conversion is indicative of the presence of toxins. The method of performing electrophoretic separations of complex samples having charged particulates and oppositely charged analytes comprising introducing a run buffer into a separation channel having an inlet end, selectively introducing the oppositely charged analytes in the complex sample into the separation channel, and electrophoretically separating the charged particulates and the oppositely charged analytes. Additionally, a device for varying with respect to time the bulk flow of a fluid in a separation channel of an electrophoretic device having a buffer reservoir in fluid contact with the separation channel is provided. The device includes a pressure sensor in fluid contact with a buffer reservoir, a high pressure reservoir in selective fluidic communication with the buffer reservoir, a low pressure reservoir in selective fluidic communication with the buffer reservoir and in fluidic communication with the high pressure reservoir, and a pumping device for pumping a gas from the low pressure reservoir to the high pressure reservoir.

公开(公告)号：US10756263B2

公开(公告)日：2020-08-25

申请号：US16110376

申请日：2018-08-23

Applicant: Purdue Research Foundation ,  Gov. of the U.S. as Represented by Sec. of Comm. National Institute of Standards and Technology

Inventor： Joerg Appenzeller ,  Feng Zhang ,  Yuqi Zhu ,  Albert V. Davydov ,  Sergiy Krylyuk ,  Huairuo Zhang ,  Leonid A. Bendersky

IPC: G11C11/00 ,  H01L45/00 ,  G11C13/00

Abstract: A method of switching a phase-change device (Device), including changing phase of the Device from a semiconducting 2H phase to a new 2Hd phase with a higher conductivity, the Device having an active material with a thickness including a phase transition material to thereby transition the Device from a high resistive state (HRS) to a low resistive state (LRS) by application of a set voltage and further to return the Device from the LRS back to the HRS by application of a reset voltage.

公开(公告)号：US20190271750A1

公开(公告)日：2019-09-05

申请号：US15912420

申请日：2018-03-05

Applicant: QALIBRE MD, INC. ,  NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY

Inventor： Elizabeth Mirowski ,  Michael Snow ,  Kathryn Keenan

IPC: G01R33/48 ,  G01R33/28 ,  G01R33/56 ,  G01N24/08 ,  G01K15/00

Abstract: Provided herein are novel liquid crystal based devices for the facile measurement of temperature in an MRI system. The thermometers comprise a plurality of vessels wherein each vessel contains a liquid crystal composition having a unique phase transition temperature. By scanning with appropriate techniques, the state of the liquid crystals in each vessel can be assessed, and the temperature at the time of the scan can be determined by the state of the liquid crystal compositions. Also provided are novel vessels and assemblies of vessels that can be used as MRI thermometers and which are compatible with MRI phantoms.

公开(公告)号：US10067118B2

公开(公告)日：2018-09-04

申请号：US14872128

申请日：2015-09-30

Applicant: NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY

Inventor： John S. Suehle ,  John J. Kasianowicz ,  Arvind Balijepalli ,  Joseph W. Robertson ,  Jessica Benjamini

IPC: G01N27/48 ,  G01N33/487

Abstract: A single molecule filter includes: a membrane including: a first surface; a second surface; and a membrane aperture disposed in the membrane and traversing the membrane from the first surface to the second surface, the membrane aperture provided to communicate a single molecule across the membrane; and a nanotube disposed on the membrane and including: a first end disposed on the first surface of the membrane; a second end disposed distal to the first surface; and a tubular aperture extending along the nanotube from the first end to the second end, the tubular aperture provided to communicate the single molecule from the second end of the nanotube to the membrane aperture.

公开(公告)号：US20180095003A1

公开(公告)日：2018-04-05

申请号：US15590005

申请日：2017-05-08

Applicant: California Institute of Technology ,  The Regents of the University of California ,  National Institute of Standards and Technology

Inventor： Kerry Vahala ,  John E. Bowers ,  Kartik A. Srinivasan ,  Scott B. Papp ,  Scott A. Diddams

IPC: G01M11/00 ,  G05D25/02 ,  H01S3/10 ,  H01S3/08

CPC classification number: G01M11/333 ,  G05D25/02 ,  H01S3/08027 ,  H01S3/1003

Abstract: A dual-comb optical-frequency comb generator includes a tunable comb-generating laser, a coarse-comb generator, a fine-comb generator, a second harmonic generator, a coarse-comb offset photodetector, a dual-comb offset photodetector, and a fine-comb photodetector. The coarse comb is self-referencing and coupled to the fine comb so as to enable absolute determination of the frequencies of the fine comb.

公开(公告)号：US09726553B2

公开(公告)日：2017-08-08

申请号：US14301921

申请日：2014-06-11

Applicant: NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY

Inventor： Zeeshan Ahmed ,  Steve Semancik ,  Jacob M Taylor ,  Jingyun Fan ,  Mohammad Hafezi ,  Haitan Xu ,  Gregory Strouse

IPC: G01J5/08 ,  G01J5/44 ,  G01K11/00

CPC classification number: G01K11/00

Abstract: A thermometer includes a substrate; an optical resonator disposed on the substrate and including an optical resonance, the optical resonator being configured to receive a resonant frequency corresponding to the optical resonance; and a waveguide disposed on the substrate proximate to the optical resonator to receive input light, to communicate the resonant frequency to the optical resonator, and to transmit output light; wherein an aperture is interposed between: the substrate and the optical resonator, the substrate and the waveguide, or a combination comprising at least one of the foregoing, and the thermometer is configured to change the optical resonance in response to a change in temperature of the optical resonator.

公开(公告)号：US09719878B2

公开(公告)日：2017-08-01

申请号：US14664247

申请日：2015-03-20

Applicant: NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY

Inventor： Jay H. Hendricks ,  Gregory F. Strouse ,  Jacob E. Ricker ,  Douglas A. Olson ,  Gregory E. Scace ,  Jack A. Stone ,  Patrick F. Egan

IPC: G01L11/02 ,  G01K11/00 ,  G01N21/45

CPC classification number: G01L11/02 ,  G01K11/00 ,  G01N21/45

Abstract: An article to determine a sample condition includes a substrate; a reference optical cavity disposed on the substrate and comprising a reference cavity, the reference optical cavity being configured to support a reference optical resonance and to maintain an axial length of the reference cavity; and a sample optical cavity disposed on the substrate and comprising a sample cavity, the sample optical cavity being configured to support a sample optical resonance and to maintain an axial length of the sample cavity.

公开(公告)号：US09714991B2

公开(公告)日：2017-07-25

申请号：US15059824

申请日：2016-03-03

Applicant: NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY

Inventor： Daniel B. Gopman

IPC: G01N27/76 ,  G01R33/16 ,  G01N27/72 ,  G01R33/565

CPC classification number: G01R33/16 ,  G01N27/72 ,  G01N27/76 ,  G01R33/56536 ,  G05B2219/37124 ,  G05B2219/37185

Abstract: A susceptometer includes: a substrate; a plurality of electrodes including: a first pair of electrodes disposed on the substrate; a second pair of electrodes disposed on the substrate, the second pair of electrodes arranged collinear with the first pair of electrodes to form a set of aligned electrodes; and a third pair of electrodes disposed on the substrate, the third pair of electrodes arranged noncollinearly with set of aligned electrodes; and a solenoid circumscribingly disposed around the electrodes to: receive the sample such that the solenoid is circumscribingly disposed around the sample; receive an alternating current and produce an primary magnetic field based on the alternating current; and subject the sample to the primary magnetic field.