Claims
- 1. A sensor device for determining a barrier property of a coating with respect to a fluid of interest, the sensor device comprising:
a sensing layer comprising a material having a predetermined response to an exposure to the fluid of interest; and an overlayer disposable between the sensing layer and the coating, the overlayer comprising a material that does not substantially affect the predetermined response of the sensing layer to the material of interest, and the overlayer further comprising a material that protects the sensing layer from chemical damage due to interaction with the barrier coating.
- 2. The sensor device of claim 1, wherein the overlayer further comprises an amorphous fluoropolymer.
- 3. The sensor device of claim 1, wherein the overlayer further comprises a random copolymer of tetrafluoroethylene (TEF) and perfluoro-2, 2-dimethyl-1, 3-dioxole (PDD).
- 4. The sensor device of claim 1, wherein the overlayer further comprises a polyimide.
- 5. The sensor device of claim 2, wherein the sensing layer comprises a polymer.
- 6. The sensor device of claim 2, wherein the sensing layer comprises a sol-gel.
- 7. The sensor device of claim 2, wherein the sensing layer comprises a polymer and a luminophore.
- 8. The sensor device of claim 2, wherein the sensing layer comprises a polymer and a colorimetric reagent.
- 9. The sensor device of claim 2, wherein the sensing layer comprises a sol-gel and a colorimetric reagent.
- 10. The sensor device of claim 1, wherein a value of the predetermined response relates to a measurement of the barrier property.
- 11. A system for determining a barrier property of an array of barrier coatings with respect to a fluid of interest, comprising:
a sensor device on which the array of barrier coatings are disposed, the sensor device having a sensing layer and an overlayer, the sensing layer comprising a material having a predetermined response to an exposure to the material of interest, the overlayer disposable between the sensing layer and the array of barrier coatings, the overlayer comprising a material that does not substantially affect the predetermined response of the sensing layer to the material of interest, and the overlayer further comprising a material that protects the sensing layer from chemical damage due to interaction with the barrier coating; a radiation source having an output for generating a reference radiation directable toward the sensor device, wherein an interaction between the reference radiation and the sensor device generates a resultant radiation; and a detector for measuring characteristics of the resultant radiation, wherein the measured characteristics of the resultant radiation are relatable to a barrier property for each of the array of barrier coatings.
- 12. The system of claim 11, wherein the overlayer further comprises an amorphous fluoropolymer.
- 13. The system of claim 11, wherein the overlayer further comprises a random copolymer of tetrafluoroethylene (TEF) and perfluoro-2, 2-dimethyl-1, 3-dioxole (PDD).
- 14. The system of claim 12, wherein the sensing layer comprises a polymer.
- 15. The system of claim 12, wherein the sensing layer comprises a polymer and a fluorophore.
- 16. A device for mapping of barrier coatings, the device comprising:
a sensor having at least one external surface; a protective overlayer applied to at least one of the at least one external surface, wherein the protective overlayer is fluid-permeable and wherein the protective overlayer protects the external surface of the sensor from damage from a barrier coating; an array of barrier coatings in a library deposited onto the protective overlayer; a fluid of interest for exposure to the array of barrier coatings; and a measurement device for measuring variation in analytical signal for the array of barrier coatings exposed to the fluid of interest.
- 17. The device of claim 16, wherein the sensor comprises a fluid-permeable substrate or a fluid-impermeable substrate.
- 18. The device of claim 16, wherein the sensor is selected from the group consisting of an optical sensor, an acoustic wave sensor, a chemical resistor, a micro-electro-mechanical system sensor, and an electrochemical sensor.
- 19. The device of claim 16, wherein the sensor is an optical sensor selected from the group consisting of a colorimetric sensor, a luminescent sensor, a chemiluminescent sensor, a vacuum UV absorbance sensor, a UV-vis absorbance sensor, an infrared absorbance sensor, a Raman sensor, an interferometric sensor, a polarization sensor, and a luminescence lifetime sensor.
- 20. The device of claim 16, wherein the fluid of interest is selected from the group consisting of water vapor and oxygen.
- 21. The device of claim 16, wherein the variation in analytical signal comprises a variation in luminescence that varies with permeability of barrier coatings in the array of barrier coatings to the material of interest.
- 22. The device of claim 17, wherein the sensor comprises an array of sensor regions .
- 23. The device of claim 17, wherein the sensor comprises an oxygen sensor.
- 24. The device of claim 16, wherein the fluid of interest is oxygen.
- 25. The device of claim 16, wherein the sensor comprises a luminophore.
- 26. The device of claim 16, wherein the variation in analytical signal comprises a variation in luminescence measured over time.
- 27. The device of claim 16, wherein the variation in analytical signal comprises a variation in luminescence intensity.
- 28. The device of claim 16, wherein the variation in analytical signal comprises a variation in luminescence lifetime.
- 29. The device of claim 16, wherein the measurement device comprises a multichannel detector.
- 30. A method for measuring barrier properties of barrier coatings, the method comprising:
providing a chemical sensor having at least one external surface; applying a protective overlayer to the at least one external surface of the chemical sensor, the protective overlayer being fluid-permeable and protecting the external surface of the sensor from damage from a barrier coating; placing an array of barrier coatings on the protective overlayer; exposing the array of barrier coatings to a fluid of interest; and measuring a variation in the barrier properties of the array of barrier coatings.
- 31. The method of claim 30, where the array of barrier coatings includes reference regions such that a relative performance of each of the array of barrier coatings may be determined.
- 32. The method of claim 31, where the sensor comprises a luminescent sensor.
- 33. The method of claim 32, where measuring a variation in the barrier properties comprises measuring a variation in luminescence of each of the array of barrier coatings.
- 34. The method of claim 33, further comprising comparing a luminescence signal for a chemically sensitive layer beneath the array of barrier coatings for regions having barrier coatings to a luminescence signal produced by the reference regions.
- 35. The method of claim 34, wherein the reference regions comprise a portion of the sensor having no barrier coating applied or having a coating with known characteristics.
- 36. The method of claim 30, where variation in barrier properties comprises measuring variation in luminescence of the array of barrier coatings via obtaining a digital photograph of the array of barrier coatings.
- 37. A system for measuring barrier properties of barrier coatings, the system comprising:
means for providing a sensor having at least one external surface; means for applying a protective overlayer to the at least one external surface of the sensor, the protective overlayer being fluid-permeable and protecting the sensor from damage from a barrier coating; means for placing an array of barrier coatings on the protective overlayer; means for exposing the array of barrier coatings to a fluid of interest; and means for measuring variation in a barrier property of each of the array of barrier coatings.
FEDERAL RESEARCH STATEMENT
[0001] The U.S. Government may have certain rights in this invention pursuant to NIST contract number 70NANB9H3038.