公开(公告)号：US20170082566A1

公开(公告)日：2017-03-23

申请号：US15368054

申请日：2016-12-02

Applicant: Regents of the University of Minnesota

Inventor： Steven J. Koester

IPC: G01N27/22 ,  H01L29/93 ,  H01L29/16 ,  G01R27/26

CPC classification number: G01N27/221 ,  G01N27/227 ,  G01R27/2605 ,  H01L29/1025 ,  H01L29/1606 ,  H01L29/42312 ,  H01L29/93 ,  H01L31/085 ,  H01L31/115

Abstract: An electrical device includes at least one graphene quantum capacitance varactor. In some examples, the graphene quantum capacitance varactor includes an insulator layer, a graphene layer disposed on the insulator layer, a dielectric layer disposed on the graphene layer, a gate electrode formed on the dielectric layer, and at least one contact electrode disposed on the graphene layer and making electrical contact with the graphene layer. In other examples, the graphene quantum capacitance varactor includes an insulator layer, a gate electrode recessed in the insulator layer, a dielectric layer formed on the gate electrode, a graphene layer formed on the dielectric layer, wherein the graphene layer comprises an exposed surface opposite the dielectric layer, and at least one contact electrode formed on the graphene layer and making electrical contact with the graphene layer.

公开(公告)号：US20230341345A1

公开(公告)日：2023-10-26

申请号：US18068600

申请日：2022-12-20

Applicant: Regents of the University of Minnesota

Inventor： Steven J. Koester

IPC: G01N27/22 ,  H01L29/10 ,  H01L29/16 ,  H01L29/423 ,  H01L29/93 ,  H01L31/08 ,  H01L31/115 ,  G01R27/26

CPC classification number: G01N27/221 ,  G01N27/227 ,  H01L29/1025 ,  H01L29/1606 ,  H01L29/42312 ,  H01L29/93 ,  H01L31/085 ,  H01L31/115 ,  G01R27/2605

Abstract: An electrical device includes at least one graphene quantum capacitance varactor. In some examples, the graphene quantum capacitance varactor includes an insulator layer, a graphene layer disposed on the insulator layer, a dielectric layer disposed on the graphene layer, a gate electrode formed on the dielectric layer, and at least one contact electrode disposed on the graphene layer and making electrical contact with the graphene layer. In other examples, the graphene quantum capacitance varactor includes an insulator layer, a gate electrode recessed in the insulator layer, a dielectric layer formed on the gate electrode, a graphene layer formed on the dielectric layer, wherein the graphene layer comprises an exposed surface opposite the dielectric layer, and at least one contact electrode formed on the graphene layer and making electrical contact with the graphene layer.

公开(公告)号：US11561192B2

公开(公告)日：2023-01-24

申请号：US17249213

申请日：2021-02-24

Applicant: Regents of the University of Minnesota

Inventor： Steven J. Koester

IPC: H01L29/93 ,  G01N27/22 ,  H01L29/10 ,  H01L29/16 ,  H01L29/423 ,  H01L31/08 ,  H01L31/115 ,  G01R27/26

Abstract: An electrical device includes at least one graphene quantum capacitance varactor. In some examples, the graphene quantum capacitance varactor includes an insulator layer, a graphene layer disposed on the insulator layer, a dielectric layer disposed on the graphene layer, a gate electrode formed on the dielectric layer, and at least one contact electrode disposed on the graphene layer and making electrical contact with the graphene layer. In other examples, the graphene quantum capacitance varactor includes an insulator layer, a gate electrode recessed in the insulator layer, a dielectric layer formed on the gate electrode, a graphene layer formed on the dielectric layer, wherein the graphene layer comprises an exposed surface opposite the dielectric layer, and at least one contact electrode formed on the graphene layer and making electrical contact with the graphene layer.

公开(公告)号：US20220291198A1

公开(公告)日：2022-09-15

申请号：US17707214

申请日：2022-03-29

Applicant: Boston Scientific Scimed, Inc. ,  REGENTS OF THE UNIVERSITY OF MINNESOTA

Inventor： Xue Zhen ,  Philippe Pierre Joseph Buhlmann ,  Steven J. Koester ,  Justin Theodore Nelson

IPC: G01N33/497 ,  G01N27/12 ,  G01N27/22

Abstract: Embodiments include chemical sensors, devices and systems including the same, and related methods. In an embodiment, a medical device is provided. The medical device can include a graphene varactor, including a graphene layer and a self-assembled monolayer disposed on an outer surface of the graphene layer through electrostatic interactions between a partial positive charge on hydrogen atoms of one or more hydrocarbons of the self-assembled monolayer and a π-electron system of graphene. The self-assembled monolayer can include one or more substituted porphyrins or substituted metalloporphyrins, or derivatives thereof. Other embodiments are also included herein.

公开(公告)号：US10948447B2

公开(公告)日：2021-03-16

申请号：US16905364

申请日：2020-06-18

Applicant: Regents of the University of Minnesota

Inventor： Steven J. Koester

IPC: H01L29/93 ,  G01N27/22 ,  H01L29/10 ,  H01L29/16 ,  H01L29/423 ,  H01L31/08 ,  H01L31/115 ,  G01R27/26

Abstract: An electrical device includes at least one graphene quantum capacitance varactor. In some examples, the graphene quantum capacitance varactor includes an insulator layer, a graphene layer disposed on the insulator layer, a dielectric layer disposed on the graphene layer, a gate electrode formed on the dielectric layer, and at least one contact electrode disposed on the graphene layer and making electrical contact with the graphene layer. In other examples, the graphene quantum capacitance varactor includes an insulator layer, a gate electrode recessed in the insulator layer, a dielectric layer formed on the gate electrode, a graphene layer formed on the dielectric layer, wherein the graphene layer comprises an exposed surface opposite the dielectric layer, and at least one contact electrode formed on the graphene layer and making electrical contact with the graphene layer.

公开(公告)号：US20190137430A1

公开(公告)日：2019-05-09

申请号：US16222660

申请日：2018-12-17

Applicant: Regents of the University of Minnesota

Inventor： Steven J. Koester

IPC: G01N27/22 ,  G01R27/26 ,  H01L31/115 ,  H01L31/08 ,  H01L29/423 ,  H01L29/16 ,  H01L29/10 ,  H01L29/93

Abstract: An electrical device includes at least one graphene quantum capacitance varactor. In some examples, the graphene quantum capacitance varactor includes an insulator layer, a graphene layer disposed on the insulator layer, a dielectric layer disposed on the graphene layer, a gate electrode formed on the dielectric layer, and at least one contact electrode disposed on the graphene layer and making electrical contact with the graphene layer. In other examples, the graphene quantum capacitance varactor includes an insulator layer, a gate electrode recessed in the insulator layer, a dielectric layer formed on the gate electrode, a graphene layer formed on the dielectric layer, wherein the graphene layer comprises an exposed surface opposite the dielectric layer, and at least one contact electrode formed on the graphene layer and making electrical contact with the graphene layer.

公开(公告)号：US11923419B2

公开(公告)日：2024-03-05

申请号：US16996537

申请日：2020-08-18

Applicant: REGENTS OF THE UNIVERSITY OF MINNESOTA

Inventor： Xue Zhen ,  Philippe Pierre Joseph Buhlmann ,  Steven J. Koester

IPC: H01L29/16 ,  A61B5/08 ,  A61L31/02 ,  C01B32/194 ,  G01N27/04 ,  G01N27/22 ,  G01N33/497 ,  H01L29/93 ,  H01L21/02

CPC classification number: H01L29/1606 ,  A61B5/082 ,  A61L31/024 ,  C01B32/194 ,  G01N27/045 ,  G01N27/228 ,  G01N33/497 ,  H01L29/93 ,  C01B2204/22 ,  G01N2027/222 ,  H01L21/02499 ,  H01L2229/00

Abstract: Chemical sensors, devices and systems including the same, and related methods are disclosed. In an embodiment, a medical device is included having a graphene varactor including a graphene layer and a self-assembled monolayer disposed on an outer surface of the graphene layer through non-covalent interactions between the self-assembled monolayer and a π-electron system of graphene. The self-assembled monolayer includes one or more pillarenes, substituted pillarenes, calixarenes, substituted calixarenes, peralkylated cyclodextrins, substituted peralkylated cyclodextrins, pyrenes, or substituted pyrenes, or derivatives of each. Other embodiments are also included.

公开(公告)号：US11867596B2

公开(公告)日：2024-01-09

申请号：US17707214

申请日：2022-03-29

Applicant: REGENTS OF THE UNIVERSITY OF MINNESOTA

Inventor： Xue Zhen ,  Philippe Pierre Joseph Buhlmann ,  Steven J. Koester ,  Justin Theodore Nelson

IPC: G01N33/497 ,  G01N27/12 ,  G01N27/22

CPC classification number: G01N33/497 ,  G01N27/125 ,  G01N27/227 ,  G01N2610/00

Abstract: Embodiments include chemical sensors, devices and systems including the same, and related methods. In an embodiment, a medical device is provided. The medical device can include a graphene varactor, including a graphene layer and a self-assembled monolayer disposed on an outer surface of the graphene layer through electrostatic interactions between a partial positive charge on hydrogen atoms of one or more hydrocarbons of the self-assembled monolayer and a π-electron system of graphene. The self-assembled monolayer can include one or more substituted porphyrins or substituted metalloporphyrins, or derivatives thereof. Other embodiments are also included herein.

公开(公告)号：US11293914B2

公开(公告)日：2022-04-05

申请号：US16393177

申请日：2019-04-24

Applicant: REGENTS OF THE UNIVERSITY OF MINNESOTA ,  Boston Scientific Scimed, Inc.

Inventor： Xue Zhen ,  Philippe Pierre Joseph Buhlmann ,  Steven J. Koester ,  Justin Theodore Nelson

IPC: G01N33/497 ,  G01N27/22 ,  G01N27/12

Abstract: Embodiments include chemical sensors, devices and systems including the same, and related methods. In an embodiment, a medical device is provided. The medical device can include a graphene varactor, including a graphene layer and a self-assembled monolayer disposed on an outer surface of the graphene layer through electrostatic interactions between a partial positive charge on hydrogen atoms of one or more hydrocarbons of the self-assembled monolayer and a it-electron system of graphene. The self-assembled monolayer can include one or more substituted porphyrins or substituted metalloporphyrins, or derivatives thereof. Other embodiments are also included herein.

公开(公告)号：US20220072753A1

公开(公告)日：2022-03-10

申请号：US16951794

申请日：2020-11-18

Applicant: Regents of the University of Minnesota ,  U.S. Government as Represented by the Secretary of the Army

Inventor： Michael C. McAlpine ,  Ruitao Su ,  Steven J. Koester ,  Joshua Uzarski

IPC: B29C48/05 ,  B33Y30/00 ,  B33Y80/00 ,  B29C48/30 ,  B29C35/08 ,  C08L83/04

Abstract: A printed structure including a plurality of overlying layers of elongate polymeric filaments stacked on a surface of a substrate. The elongate polymeric filaments are stacked on each other along their lengths to form a liquid impermeable, self-supporting wall. The liquid impermeable self-supporting wall forms a wall angle of about 30° to about 90° with respect to a plane of the surface of the substrate.