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US 12,345,669 B2Granted
Ethylene sensor
AssigneeMassachusetts Institute of Technology
InventorsTimothy M. Swager, Birgit Esser, Jan M. Schnorr
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Abstract
A sensor device can include a transition metal complex capable of interacting with a carbon-carbon multiple bond moiety. The sensor can detect the fruit-ripening hormone ethylene with high sensitivity.
Claims20
A sensor comprising:
- a conductive material including a carbon nanotube, the conductive material being in electrical communication with at least two electrodes;
- a transition metal complex including a transition metal, a multidentate ligand, and a ligand including a thiol coordinated to the transition metal and associated with the carbon nanotube, the transition metal complex being mixed with the conductive material, the transition metal complex capable of forming a stable complex with ethylene and interacting with the carbon nanotube and the conductive material via the ligand including the thiol, and
- the at least two electrodes being configured to measure an electrical property between the at least two electrodes in an analyte-free state such that an interaction between the transition metal complex and an analyte results in a change of the measurable electrical property when the sensor is exposed to the analyte.
A sensor comprising:
- a carbon nanotube in electrical communication with at least two electrodes;
- and
- a transition metal complex including a transition metal, a multidentate ligand, and a ligand including a thiol coordinated to the transition metal and associated with the carbon nanotube, the transition metal complex capable of forming a stable complex with ethylene and interacting with the carbon nanotube,
- the sensor having a baseline level of a measurable electrical property measured between the at least two electrodes in an analyte-free state such that an interaction between the transition metal complex and an analyte results in a change of the measurable electrical property, the transition metal complex associated with the carbon nanotube by a covalent link between the carbon nanotube and the ligand including the thiol.
1 more element
A sensor comprising:
- a carbon nanotube in electrical communication with at least two electrodes;
- and
- a transition metal complex including a transition metal, a multidentate ligand, and a ligand including a thiol coordinated to the transition metal and associated with the carbon nanotube, the transition metal complex capable of forming a stable complex with ethylene and interacting with the carbon nanotube,
- the sensor having a baseline level of a measurable electrical property measured between the at least two electrodes in an analyte-free state such that an interaction between the transition metal complex and an analyte results in a change of the measurable electrical property, the transition metal complex associated with the carbon nanotube via the ligand including the thiol bound to a polymer which is non-covalently associated with the carbon nanotube.
1 more element
A method of sensing an analyte, comprising:
- exposing a sensor to a sample, the sensor including:
- at least two electrodes;
- a conductive material comprising a carbon-carbon multiple bond moiety, the conductive material being in electrical communication with the at least two electrodes;
- and
- a transition metal complex including a transition metal, a multidentate ligand, and a ligand including a thiol coordinated to the transition metal the transition metal complex associated with the carbon-carbon multiple bond moiety via the ligand including the thiol, the transition metal complex capable of forming a stable complex with ethylene;
- and
- measuring an electrical property at the at least two electrodes of the sensor when exposed to an analyte.
4 more elements
Dependencies are inferred from the claim text.