IONIC LIQUID CARBON NANOTUBE COMPOSITES FOR WIRELESS CHEMICAL SENSING

• US 20170364785A1
• Filed: 06/16/2017
• Published: 12/21/2017
• Est. Priority Date: 06/17/2016
• Status: Abandoned Application

• Current Assignee: Massachusetts Institute of Technology
• Original Assignee: Massachusetts Institute of Technology
• Inventors: Swager, Timothy Manning, Azzarelli, Joseph Michael, Zhu, Rong
• Application Number:
  US15/626,041
• Publication Number:
  US 20170364785A1
• Time in Patent Office: Days
• CPC Class Codes: A61B 2562/0285 Nanoscale sensors
• CPC Class Codes: A61B 2562/029 Humidity sensors
• CPC Class Codes: A61B 5/082 Evaluation by breath analysis, e.g. determination of the chemical composition of exhaled breath A61B5/083, A61B5/091 take precedence
• CPC Class Codes: A61B 5/4845 Toxicology, e.g. by detection of alcohol, drug or toxic products A61B5/4848 takes precedence
• CPC Class Codes: G01N 27/122 Circuits particularly adapted therefor, e.g. linearising circuits
• CPC Class Codes: G01N 27/127 comprising nanoparticles
• CPC Class Codes: G01N 27/4146 involving nanosized elements, e.g. nanotubes, nanowires
• CPC Class Codes: G01N 33/0057 Warfare agents or explosives
• CPC Class Codes: G01N 33/0075 for multiple spatially distributed sensors, e.g. for environmental monitoring
• CPC Class Codes: G06K 19/0717 the sensor being capable of sensing environmental conditions such as temperature history or pressure
• CPC Class Codes: G06Q 50/265 Personal security, identity or safety

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.

Claims

1. A device for detecting a stimulus comprising:

a radio frequency identification tag including a sensor portion including;

an integrated circuit; and

a chemiresistor,

wherein the integrated circuit and the chemiresistor are connected in parallel,

wherein the sensor portion is configured to change resistivity when the radio frequency identification tag contacts or interacts with the stimulus, whereby the resistivity change alters an output of the radio frequency identification tag, and wherein the sensor portion is configured to activate the circuit or deactivate the circuit when contacted or having interacted with the stimulus.

2. The device of claim 1, wherein the chemiresistor includes a plurality of nanotubes.

3. The device of claim 2, wherein the chemiresistor further includes an ionic liquid.

4. The device of claim 1, wherein the device is a badge wearable by a person.

5. The device of claim 4, wherein the badge is for a single-use.

6. The device of claim 2, wherein the nanotubes are single walled carbon nanotubes.

7. The device of claim 3, wherein the ionic liquid is 1-butyl-3-methylimidazolium chloride.

8. The device of claim 1, wherein the stimulus includes an analyte.

9. The device of claim 1, wherein the analyte is diethyl chlorophosphate.

10. A system for detecting a stimulus comprising the device of claim 1 and a reader detecting the output from the radio frequency identification tag.

11. The system of claim 10, wherein the reader is a handheld reader.

12. The system of claim 11, wherein the handheld reader is a smartphone.

13. The system of claim 9, wherein the system includes a dosimeter.

14. The system of claim 13, wherein the system includes a plurality of tags.

15. The system of claim 14, wherein each of the plurality of tags is capable of detecting at least one stimulus.

16. A food packaging including the device of claim 1.

17. A breath analysis detector including the device of claim 1.

18. A humidity sensor including the device of claim 1,

36. The device of claim 1, wherein the sensor portion further comprises a resistor in series with the integrated circuit.

37. The device of claim 36, wherein the resistor sets a threshold at which the integrated circuit is activated.

37-1. The device of claim 1, wherein the chemiresistor includes a plurality of conducting polymers

19. A method of detecting a stimulus comprising:

detecting an output from a radio frequency identification tag including a sensor portion including;

an integrated circuit; and

a chemiresistor,

wherein the integrated circuit and the chemiresistor are connected in parallel,

wherein the sensor portion is configured to change resistivity when the radio frequency identification tag contacts or interacts with the stimulus, whereby the resistivity change alters an output of the radio frequency identification tag, and wherein the sensor portion is configured to activate the circuit or deactivate the circuit when contacted or having interacted with the stimulus.

20. The method of claim 19, further comprising detecting the output of the radio frequency identification by a reader.

21. The method of claim 20, wherein the reader is a hand-held reader.

22. The method of claim 21, wherein the reader includes a smartphone.

23. The method of claim 19, wherein the chemiresistor includes a plurality of nanotubes.

24. The method of claim 23, wherein the chemiresistor further includes an ionic liquid.

25. The method of claim 23, wherein the nanotubes are single walled carbon nanotubes.

26. The method of claim 24, wherein the ionic liquid is 1-butyl-3-methylimidazolium chloride.

27. The method of claim 19, wherein the stimulus includes an analyte.

28. The method of claim 27, wherein the analyte is diethyl chlorophosphate.

29. The method of claim 19, further comprising producing a readable signal in a reader as a result of the resistivity change.

30. The method of claim 19, further comprising turning off a readable signal in a reader as a result of the resistivity change

31. The method of claim 19, wherein the output is detectable by a reader after the output is shifted by detection of the stimulus.

32. The method of claim 19, wherein the output is detectable by a reader after the output going through a physical object.

33. The method of claim 19, wherein the stimulus contacts or interacts with a portion of the surface of the radio frequency identification tag.

34. The method of claim 19, wherein the radio frequency identification tag does not require a power source.

35. The method of claim 19, further comprising altering an electrical connection within the radio frequency identification tag.