Carbon dioxide nanosensor, and respiratory CO2 monitors
First Claim
1. A nanostructure sensor for sensing carbon dioxide, comprising:
- a substrate;
a first nanostructure disposed adjacent the substrate;
one or more conducting elements in electrical communication with the first nanostructure; and
at least one recognition material operatively associated with the first nanostructure, the at least one recognition material configured for interacting with carbon dioxide.
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Abstract
An electronic system and method for detecting analytes, such as carbon dioxide, is provided, using an improved nanostructure sensor (CO2 sensor). The CO2 sensor may comprise a substrate and a nanostructure, such as a one or more carbon nanotubes disposed over the substrate (e.g., as a network). One or more conductive elements may electrically communicate with the nanostructure. A counter or gate electrode may be positioned adjacent the nanostructure. A functionalization material reactive with carbon dioxide may be included, either disposed in contact with the nanostructure or isolated by a dielectric. The sensor may be connected to a circuit responsive to changes in CO2 concentration in the environment. Embodiments are described of medical sensing systems including one or more CO2 sensors. One embodiment comprises a breath sampling cannula which is connected to a sensor unit. In an alternative, the cannula permits supplemental oxygen to be administered, while recovering and measuring analytes in breath samples. The cannula may connect to a portable processor-display unit for monitoring one or more analytes, such as CO2. Another embodiment includes a cannula configured for the monitoring of sleep disorders, such as apnea, comprising one or more sensors disposed adjacent a breath sampling channel, optionally including flow rate or other sensors. The sensors may be connected by wired or wireless links for to a processor/input/display unit. Any of the embodiments may include filters, selectively permeable membranes, absorbents, and the like to precondition the breath sample, may be configured to include complementary chemistry measurements.
160 Citations
14 Claims
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1. A nanostructure sensor for sensing carbon dioxide, comprising:
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a substrate;
a first nanostructure disposed adjacent the substrate;
one or more conducting elements in electrical communication with the first nanostructure; and
at least one recognition material operatively associated with the first nanostructure, the at least one recognition material configured for interacting with carbon dioxide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification