公开(公告)号：US10444187B2

公开(公告)日：2019-10-15

申请号：US15690624

申请日：2017-08-30

Applicant: Northwestern University

Inventor： Matthew Grayson ,  Jiajun Luo

IPC: G01N27/72 ,  G01R19/08 ,  H05K1/11 ,  G01R15/20 ,  G01R31/26

Abstract: Systems and methods can provide a fast and accurate way to measure conductivity and Hall effect, such that transient conductivities, transient carrier densities or transient mobilities can be measured on millisecond time scales, for example. The systems and methods can also reduce the minimum magnetic field needed to extract carrier density or mobility of a given sample, and reduce the minimum mobility that can be measured with a given magnetic field.

公开(公告)号：US10720560B2

公开(公告)日：2020-07-21

申请号：US14850014

申请日：2015-09-10

Applicant: Northwestern University

Inventor： Matthew Grayson ,  Mark C Hersam ,  Chuanle Zhou ,  Yang Tang ,  Tejas Shastry

IPC: H01L35/32 ,  H01L35/22 ,  H01L35/34 ,  H01L35/24 ,  H01L35/16 ,  H01L35/18

Abstract: A transverse thermoelectric includes a first array of hole-conducting nanowires and a second array of electron-conducting nanowires positioned orthogonal to the first array of nanowires. A substrate provides structure to the first array of nanowires and the second array of nanowires.

公开(公告)号：US20160079509A1

公开(公告)日：2016-03-17

申请号：US14850014

申请日：2015-09-10

Applicant: Northwestern University

Inventor： Matthew Grayson ,  Mark C. Hersam ,  Chuanle Zhou ,  Yang Tang ,  Tejas Shastry

IPC: H01L35/32 ,  H01L35/24 ,  H01L35/18 ,  H01L35/34 ,  H01L35/22 ,  H01L35/16

Abstract: A transverse thermoelectric includes a first array of hole-conducting nanowires and a second array of electron-conducting nanowires positioned orthogonal to the first array of nanowires. A substrate provides structure to the first array of nanowires and the second array of nanowires.

Abstract translation: 横向热电包括空穴传导纳米线的第一阵列和与第一纳米线阵列正交设置的电子传导纳米线的第二阵列。 衬底提供纳米线的第一阵列和第二纳米线阵列的结构。

公开(公告)号：US20210307731A1

公开(公告)日：2021-10-07

申请号：US17221200

申请日：2021-04-02

Applicant: Northwestern University

Inventor： Matthew Grayson ,  Jun Peng ,  Jiaxing Huang ,  Guillermo Ameer ,  Nancy Rivera Bolanos

IPC: A61B10/00

Abstract: A medical swab includes a hollow tube shaft that has a distal end and a proximal end. A swab tip is mounted to the hollow tube shaft such that a first portion of the swab tip is positioned within the distal end of the hollow tube shaft and a second portion of the swab tip extends out from the distal end of the hollow tube shaft.

公开(公告)号：US20200381607A1

公开(公告)日：2020-12-03

申请号：US16970867

申请日：2019-03-07

Applicant: Northwestern University

Inventor： Matthew Grayson ,  Ramille Shah ,  Jun Peng ,  Adam Jakus ,  Nicholas Geisendorfer

IPC: H01L35/32 ,  A41D1/00 ,  H01L35/26 ,  H01L35/34 ,  D03D1/00 ,  D03D15/00

Abstract: Woven flexible thermoelectric fabrics are provided. The fabric is a woven material that includes a series of longitudinal threads interwoven with a series of transverse threads. Within the longitudinal series, the threads have a repeating thread pattern of an n-type thermoelectric thread, a p-type thermoelectric thread, and an insulating thread. Within the transverse series, the threads have a repeating thread pattern of a first double-sided thread with conducting side down and insulating side up, a second double-sided thread with conducting side down and insulating side up, and a third double-sided thread with conducting side up and insulating side down.

公开(公告)号：US10215796B2

公开(公告)日：2019-02-26

申请号：US15151216

申请日：2016-05-10

Applicant: Northwestern University

Inventor： Matthew Grayson ,  Wang Zhou

IPC: G01R31/26

Abstract: A system and a method determine a quality of a doped semiconductor layer in terms of a charge carrier density gradient by measuring two magnetic-field-dependent resistances using four contacts of a specimen.

公开(公告)号：US20130174884A1

公开(公告)日：2013-07-11

申请号：US13735373

申请日：2013-01-07

Applicant: Northwestern University

Inventor： Matthew Grayson ,  Chuanle Zhou

IPC: H01L35/28 ,  H01L21/18 ,  H01L35/18

CPC classification number: H01L35/28 ,  H01L21/18 ,  H01L35/18 ,  H01L35/26

Abstract: A transverse thermoelectric device includes a superlattice body, electrically conductive first and second contacts, and first and second thermal contacts. The superlattice body extends between opposite first and second ends along a first direction and between opposite first and second sides along a different, second direction. The superlattice body includes alternating first and second layers of crystalline materials oriented at an oblique angle relative to the first direction. The electrically conductive first contact is coupled with the first end of the superlattice and the electrically conductive second contact is coupled with the second end of the superlattice. The first thermal contact is thermally coupled to the first side of the superlattice and the second thermal contact is thermally coupled to the second side of the superlattice. A Seebeck tensor of the superlattice body is ambipolar.

Abstract translation: 横向热电装置包括超晶格体，导电的第一和第二触点以及第一和第二热触点。 超晶格主体沿着第一方向在相对的第一和第二端之间沿着不同的第二方向在相对的第一和第二侧之间延伸。 超晶格体包括相对于第一方向以倾斜角度定向的交替的第一和第二结晶材料层。 导电的第一触点与超晶格的第一端耦合，并且导电的第二触点与超晶格的第二端耦合。 第一热接触件热耦合到超晶格的第一侧，并且第二热接触件热耦合到超晶格的第二侧。 超晶格体的塞贝克张量是双极的。

公开(公告)号：US11525847B2

公开(公告)日：2022-12-13

申请号：US17484939

申请日：2021-09-24

Applicant: NORTHWESTERN UNIVERSITY

Inventor： Matthew Grayson ,  Chulin Wang ,  Juncen Li ,  William H. Reinhardt

IPC: G01R19/00 ,  G01R33/07 ,  H01L35/28

Abstract: Systems and methods include an electrical switch that establishes a first electrical conducting path between terminals of an electrical measurement apparatus through one or more electrical leads and an electrically-conductive sample in a first state, and a second electrical conducting path between the terminals through the one or more electrical leads while bypassing the sample in a second state. A voltage VS+L is measured across all of the sample and the one or more electrical leads in the first state, while a voltage VL is measured across the one or more electrical leads while bypassing the sample in the second state. Calculations according to the equation VS=VS+L−VL are performed to determine a precision DC voltage measurement of a voltage across the sample VS in the absence of Seebeck voltage offsets contributed by the one or more electrical leads.

公开(公告)号：US20220099711A1

公开(公告)日：2022-03-31

申请号：US17484939

申请日：2021-09-24

Applicant: NORTHWESTERN UNIVERSITY

Inventor： Matthew Grayson ,  Chulin Wang ,  Juncen Li ,  William H. Reinhardt

IPC: G01R19/00 ,  H01L35/28 ,  G01R33/07

Abstract: Systems and methods include an electrical switch that establishes a first electrical conducting path between terminals of an electrical measurement apparatus through one or more electrical leads and an electrically-conductive sample in a first state, and a second electrical conducting path between the terminals through the one or more electrical leads while bypassing the sample in a second state. A voltage VS+L is measured across all of the sample and the one or more electrical leads in the first state, while a voltage VL is measured across the one or more electrical leads while bypassing the sample in the second state. Calculations according to the equation VS=VS+L−VL are performed to determine a precision DC voltage measurement of a voltage across the sample VS in the absence of Seebeck voltage offsets contributed by the one or more electrical leads.

公开(公告)号：US10529674B2

公开(公告)日：2020-01-07

申请号：US15823933

申请日：2017-11-28

Applicant: Northwestern University

Inventor： Matthew Grayson ,  Yang Tang

IPC: H01L23/58 ,  H05K3/32 ,  G01R1/067 ,  H01L23/52 ,  H01L21/66 ,  G01R15/20 ,  G01R27/14 ,  G01R31/28

Abstract: Systems and methods provide a device for characterizing a thin film, including a conducting or insulating substrate, an active layer on the conducting or insulating substrate to be characterized, and a plurality of stripline electrodes on the active layer. The plurality of stripline electrodes include a pitch width of a same order as the thickness of the active layer and strip width smaller than the thickness of the active layer.