Switchable single-walled carbon nanotube-polymer composites for CO
A sensor for carbon dioxide can include an amidine functional group.
1. A composition comprising:
a polymer including a pyridyl amino side chain and an alkylazide side chain;
a conductive material associated with the polymer.
2. The composition of claim 1 , wherein the conductive material includes a carbon nanotube, a conductive polymer, an inorganic semiconductor, a metal oxide, a carbon fiber, a carbon particle, graphite, graphene, carbon paste, metal particles, conducting ink, or combinations thereof.
3. The composition of claim 1 , wherein the polymer is a copolymer of an amine-containing monomer and an alkylazide monomer.
4. The composition of claim 1 wherein the polymer is a copolymer of vinyl pyridine and alkylazido vinyl benzene.
5. A sensor for detecting carbon dioxide comprising:
a substrate; and
a composition of claim 1 on the substrate.
6. The sensor of claim 5 , wherein the amidine-functional polymer is immobilized on a surface of the substrate.
7. The sensor of claim 5 , wherein the carbon conductive material includes a carbon nanotube.
8. The sensor of claim 5 , wherein the amidine-functional polymer is a random copolymer.
9. The sensor of claim 5 , wherein the amidine-functional polymer is a copolymer of an amine-containing monomer and an amidine-functional monomer.
10. The sensor of claim 9 , wherein the amine-containing monomer is a vinyl pyridine.
11. The sensor of claim 10 , wherein the vinyl pyridine is quaternized.
12. A method of detecting carbon dioxide comprising:
exposing a composition of claim 1 to a sample; and
measuring the conductivity change of the composition.
13. The method of claim 12 , wherein the amidine-functional polymer is immobilized on a surface of a substrate.
14. A method of preparing a sensor for detecting an analyte comprising:
linking a composition of claim 1 to a substrate;
quaternizing the amino side chain; and
functionalizing the alkylazide side chain.
15. The method of claim 14 , wherein functionalizing the alkylazide side chain includes introducing an amidine-functional group to the side chain.
16. A composition comprising a polymer including amino side chain and an alkylazide side chain, and a conductive material associated with the polymer wherein the polymer is a copolymer of an amine-containing monomer and an alkylazide monomer and wherein the amine-containing monomer is a vinyl pyridine.
17. A composition comprising a polymer including amino side chain and an alkylazide side chain, and a conductive material associated with the polymer wherein the polymer is a copolymer of an amine-containing monomer and an alkylazide monomer and wherein the alkylazide monomer is an alkylazido vinyl benzene.