System for detecting a stimulus including a radio frequency device responsive to an analyte and a portable reader

Patent metadata

Field	Value
Publication number	US-12277464-B2
Application number	US-202117539803-A
Country	US
Kind code	B2
Filing date	Dec 1, 2021
Priority date	Jun 17, 2016
Publication date	Apr 15, 2025
Grant date	Apr 15, 2025

Abstract

A wireless sensor platform design and a single walled carbon nanotube/ionic liquid-based chemidosimeter system can incorporated into a highly sensitive and selective chemical hazard badge that can dosimetrically detect an analyte down to a sub parts-per-million concentration.

First claim

What is claimed is:

1. A system for detecting a stimulus comprising:
a radio frequency device comprising a sensor element comprising an integrated circuit and a first resistive element, wherein the sensor element comprises a material responsive to an analyte and which is configured to elicit a response when a stimulus contacts or interacts with the radio frequency device; and
a portable reader adapted to
transmit radio frequency waves to the radio frequency device;
receive a spectrum of radio frequency waves from the radio frequency device; and
relate a characteristic of the spectrum to a concentration of the analyte,
wherein the characteristic of the spectrum comprises a gain of the radio frequency device and/or a reflected attenuated signal of the radio frequency device.

2. The system of claim 1 , wherein the sensor element comprises a second resistive element.

3. The system of claim 2 , wherein the second resistive element is parallel to the integrated circuit.

4. The system of claim 1 , wherein the sensor element comprises a second resistive element, wherein the second resistive element is in series with a circuitry of the integrated circuit.

5. The system of claim 1 , wherein the sensor element comprises a capacitive element.

6. The system of claim 5 , wherein the capacitive element is parallel to the integrated circuit.

7. The system of claim 1 , wherein the material of the sensor element comprises a chemiresistive material.

8. The system of claim 1 , wherein the sensor element is responsive to at least one of temperature, heat energy exposure, or radiation.

9. The system of claim 1 , wherein the characteristic of the spectrum comprises the gain of the radio frequency device.

10. The system of claim 9 , wherein the characteristic of the spectrum further comprises a resonant frequency of the radio frequency device.

11. The system of claim 1 , wherein the characteristic of the spectrum comprises the reflected attenuated signal of the radio frequency device.

12. The system of claim 1 , wherein the sensor element is wirelessly readable.

13. The system of claim 12 , wherein the sensor element is also non-line of sight readable.

14. The system of claim 1 , wherein the material of the sensor element includes a metal, an organic material, a dielectric material, a semiconductor material, a polymeric material, a biological material, a nanowire, a semiconducting nanoparticle, a carbon nanotube, a carbon nanotube network, a nanofiber, a carbon fiber, a carbon particle, carbon paste, conducting ink, or a combination thereof.

15. The system of claim 14 , wherein the sensor element has a property that can change upon exposure to an environment including at least one of a change in capacitance, a change in resistance, a change in thickness, a change in viscoelasticity, or a combination thereof.

16. The system of claim 1 , wherein the portable reader is configured to send an alert to a user when an analyte concentration detection threshold is reached.

17. The system of claim 16 , wherein the portable reader is configured to send an email or text alert to the user when the analyte concentration detection threshold is exceeded.

18. The system of claim 1 , wherein the portable reader is configured to monitor spatiotemporal changes in concentrations of chemical emissions from the sensor element and send an emergency alert to a user when a safe threshold is exceeded.

Assignees

• Massachusetts Inst Technology

Inventors

• Swager Timothy Manning
• Azzarelli Joseph Michael
• Zhu Rong

Classifications

• G06Q50/265

  Personal security, identity or safety · CPC title

• G01N27/4146

  involving nanosized elements, e.g. nanotubes, nanowires · CPC title

• A61B2562/029

  Humidity sensors · CPC title

• A61B2562/0285

  Nanoscale sensors · CPC title

• A61B5/4845

  Toxicology, e.g. by detection of alcohol, drug or toxic products (A61B5/4848 takes precedence) · CPC title