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1. WO2016019381 - DÉTECTION EN TEMPS RÉEL DE CONTAMINANTS DE L'EAU

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

What is claimed is:

1. A field-effect transistor sensor for detecting a target in an aqueous environment comprising:

a reduced graphene oxide layer coated with a passivation layer;

one or more gold nanoparticles in contact with the passivation layer; and

at least one probe bound to the one or more nanoparticles;

wherein the nanoparticles are discrete nanoparticles.

2. The sensor of claim 1, wherein the passivation layer is aluminum oxide.

3. The sensor of claim 1 or 2, wherein the passivation layer is about 1 to about 5

nanometers thick.

4. The sensor of claim 3, wherein the passivation layer is about 3 nanometers thick.

5. The sensor of any one of the preceding claims, wherein the gold nanoparticles are distributed uniformly on the reduced graphene oxide layer.

6. The sensor of any one of the preceding claims, wherein the gold nanoparticles are about 3 to about 5 nanometers in size.

7. The sensor of any one of the preceding claims wherein the gold nanoparticles are at least about 5 nanometers apart.

8. The sensor of any one of the preceding claims, wherein more than one probe is bound to the one or more nanoparticles.

9. The sensor of claim 8, wherein the more than one probes are different.

10. The sensor of any one of the preceding claims, wherein a target is a contaminant.

11. The sensor of any one of the preceding claims, wherein a target is a water additive.

12. The sensor of any one of the preceding claims, wherein the at least one probe detects a target selected from anions, cations, metals, viruses, bacteria, organic contaminants or a combination thereof.

13. The sensor of claim 12, wherein the metals are lead, arsenic, cadmium, copper, iron, or mercury.

14. The sensor of claim 12, wherein the bacteria are Giardia sp., Ligonella sp., or

Escheria coli.

15. The sensor of any one of the preceding claims, wherein the sensor is connected to a display.

16. A method for maintaining electronic stability in a field-effect transistor based water sensor comprising coating a reduced graphene oxide layer with aluminum oxide layer, wherein the aluminum oxide layer is about 1 to about 5 nanometers thick.

17. A method for detecting a target in an aqueous sample comprising:

a. contacting an aqueous sample with a sensor according to any one of claims 1- 15;

b. applying a current to the sensor; and

c. detecting a change in an electrical characteristic.

18. The method of claim 17, wherein the electrical characteristic is resistance.

19. The method of any one claims 17 and 18, wherein more than one target is detected in the sample using a single sensor with more than one probe.

20. The method of any one of claims 17-19, wherein the aqueous sample is from a water distribution system.

21. The method of any one of claims 17-19, wherein the aqueous sample is from a wastewater treatment process.

22. The method of any one of claims 17-21, wherein the change in resistance is detected continuously.

23. The method of any one of claims 17-21, wherein the change in resistance is detected periodically by the sensor.

24. The method of claim 23, wherein the change in resistance is detected daily.

25. The method of claim 23, wherein the change in resistance is detected weekly.

26. The method of claim 23, wherein the change in resistance is detected monthly.

27. The method of any one of claims 17-26, further comprising transmitting the change in resistance to a display.

28. The method of claim 23, wherein the display is remote.