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US 7,901,776 B2Granted
Plasma deposited microporous carbon material
Assignee3M Innovative Properties Company
InventorsDora M. Paolucci, Moses M. David, Neal A. Rakow, John E. Trend
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Abstract
A microporous carbon material includes a porous carbon skeleton having an average pore size from 0.1 to 10 nanometers and being substantially free of pores greater than 1 micrometer. Methods of forming the microporous carbon material are also disclosed.
Claims22
A microporous carbon material suitable for use as a sensor, comprising:
- a porous carbon skeleton having an average pore size from 0.1 to 10 nanometers and being substantially free of pores greater than 1 micrometer;
- wherein the porous carbon skeleton has an effective coefficient of extinction of less than 0.5, and
- wherein the refractive index of the microporous carbon material changes in the presence of an adsorbed analyte.
An article comprising:
- a substrate layer;
- and
- a microporous carbon skeleton layer disposed on the substrate layer, the microporous carbon skeleton having an average pore size from 0.1 to 10 nanometers and being substantially free of pores greater than 10 nanometers;
- the microporous carbon skeleton layer has an effective coefficient of extinction of less than 0.5;
- and wherein the refractive index of the microporous carbon material changes in the presence of an adsorbed analyte.
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A method of forming a microporous carbon material comprising;
- forming a hydrocarbon plasma from a hydrocarbon gas;
- depositing the hydrocarbon plasma on a substrate to form a hydrocarbon layer;
- and
- heating the hydrocarbon layer and removing at least a portion of the hydrogen to form a microporous carbon material;
- wherein the heating step comprises heating the hydrocarbon layer and removing at least a portion of the hydrogen to form a microporous carbon material having an average pore size from 1 to 10 nanometers and being substantially free of pores greater than 1 micrometer and having an effective coefficient of extinction of less than 0.5, and wherein the refractive index of the microporous carbon material changes in the presence of an adsorbed analyte.
2 more elements
Dependencies are inferred from the claim text.