ULTRA-COMPACT, PASSIVE, WIRELESS SENSOR USING QUANTUM CAPACITANCE EFFECT IN GRAPHENE

    公开(公告)号:US20200319129A1

    公开(公告)日:2020-10-08

    申请号:US16905364

    申请日:2020-06-18

    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.

    Ultra-compact, passive, varactor-based wireless sensor using quantum capacitance effect in graphene

    公开(公告)号:US10712302B2

    公开(公告)日:2020-07-14

    申请号:US16222660

    申请日:2018-12-17

    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.

    Systems and methods for measuring kinetic response of chemical sensor elements

    公开(公告)号:US11662325B2

    公开(公告)日:2023-05-30

    申请号:US16712255

    申请日:2019-12-12

    CPC classification number: G01N27/021 G01N27/221 G01N27/227 G01N33/0036

    Abstract: Embodiments herein include a kinetic response system for measuring analyte presence on a chemical sensor element. The chemical sensor element includes one or more discrete binding detectors, each discrete binding detector including a graphene varactor. The kinetic response system includes a measurement circuit having an excitation voltage generator for generating a series of excitation cycles over a time period. Each excitation cycle includes delivering a DC bias voltage to the discrete binding detectors at multiple discrete DC bias voltages across a range of DC bias voltages. The kinetic response system includes a capacitance sensor to measure capacitance of the discrete binding detectors resulting from the excitation cycles. The kinetic response system includes a controller circuit to determine the kinetics of change in at least one of a measured capacitance value and a calculated value based on the measured capacitance over the time period. Other embodiments are also included herein.

Patent Agency Ranking