公开(公告)号：US20230065235A1

公开(公告)日：2023-03-02

申请号：US17745375

申请日：2022-05-16

Applicant: Brewer Science, Inc.

Inventor： Zun Chen ,  Christopher Landorf ,  Vijaya Kayastha

IPC: G01N33/00 ,  G01N27/414

Abstract: A carbon nanotube sensor device for detecting CO2 and methods of its production and use. A printable polyethylenimine (PEI)-functionalized carbon nanomaterial paste may be used to form the active sensing layer of the device, which is particularly sensitive to CO2. A separate printed heating layer may be used to maintain the working temperature of the sensor, as well as to remove and/or clear volatile gases from the sensor.

公开(公告)号：US20230003684A1

公开(公告)日：2023-01-05

申请号：US17856932

申请日：2022-07-01

Applicant: Brewer Science, Inc.

Inventor： Jonathan J. Fury ,  Xi Cao ,  Christopher Landorf ,  Zun Chen ,  Alec Neeson ,  Weston Bowen ,  Austin Peters

IPC: G01N27/414 ,  G01N33/18 ,  G01N27/02

Abstract: A carbon nanotube (CNT) ion-selective field effect transistor (IS-FET) integrated device is used to detect nitrate ion in water. The device is operated as an IS-FET sensor, holding the measured potential between the drain electrode and an external reference electrode constant with a potentiometric circuit. Transduction occurs by changes in the effective CNT film gate potential with changes in the phase boundary potential of an ion-selective membrane (ISM) film. Moreover, the nitrate ISM film makes the device highly selective towards nitrate sensing. This printable IS-FET nitrate sensor enables real-time and high-resolution measurements and recording of nitrate ion in water at low cost.

公开(公告)号：US20210292581A1

公开(公告)日：2021-09-23

申请号：US17208386

申请日：2021-03-22

Applicant: Brewer Science, Inc.

Inventor： Zun Chen ,  Jonathan J. Fury ,  Alec Neeson

IPC: C09D11/106 ,  C09D11/033 ,  C08F214/18 ,  C08F214/26 ,  B41M1/12 ,  B41M5/00 ,  B41M1/30

Abstract: A copolymer of polytetrafluoroethylene and a perfluoro acid (e.g., Nafion™) is neutralized by a base to yield its corresponding salt, and a high-boiling-point compatible solvent is used as a substituting solvent, with the original, low-boiling-point solvent being removed by rotor evaporation. The resulting dispersion is screen printable, and its viscosity is controllable by adjusting its solids content. This screen-printable salt dispersion is especially useful in printed electronics applications such as sensors.