Sensor comprising supported aprotic ionic liquid
First Claim
Patent Images
1. A sensor comprising:
- a first electrode;
a second electrode;
a porous support in electrical communication with said first electrode and said second electrode, said porous support comprising aprotic ionic liquid having anions selected from the group consisting of trifluoromethylsulfonate (CF3SO3−
), bis(trifluoromethylsulfonyl)imide ((CF3SO2)2N−
), bis(perfluoroethylsulfonyl)imide ((CF3CF2SO2)2N−
) and tris(trifluoromethylsulfonyl)methide ((CF3SO2)3C−
);
an electrical power source for providing a voltage difference between said first electrode and said second electrode;
an ammeter in electrical communication with said first electrode and said second electrode; and
wherein at least a portion of said porous support is capable of contacting an analyte.
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Abstract
A sensor for detecting and measuring analyte includes a working electrode, a counter electrode, and a porous support positioned in between and in contact with the working electrode and the counter electrode. At least one of the working electrode and the counter electrode is perforated. Aprotic ionic liquid fills the pores and is adsorbed on the surface of the porous support. The sensor also includes an electrical power source that provides a controlled voltage difference between the working electrode and the counter electrode, and an ammeter that measures the current flowing from the working electrode to the counter electrode.
24 Citations
12 Claims
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1. A sensor comprising:
-
a first electrode;
a second electrode;
a porous support in electrical communication with said first electrode and said second electrode, said porous support comprising aprotic ionic liquid having anions selected from the group consisting of trifluoromethylsulfonate (CF3SO3−
), bis(trifluoromethylsulfonyl)imide ((CF3SO2)2N−
), bis(perfluoroethylsulfonyl)imide ((CF3CF2SO2)2N−
) and tris(trifluoromethylsulfonyl)methide ((CF3SO2)3C−
);
an electrical power source for providing a voltage difference between said first electrode and said second electrode;
an ammeter in electrical communication with said first electrode and said second electrode; and
wherein at least a portion of said porous support is capable of contacting an analyte. - View Dependent Claims (2, 3, 4, 5)
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6. A sensor comprising:
-
a first electrode;
a second electrode;
a porous support in electrical communication with said first electrode and said second electrode, said porous support comprising aprotic ionic liquid having an electrochemical window of at least 4 volts;
an electrical power source for providing a voltage difference between said first electrode and said second electrode;
an ammeter in electrical communication with said first electrode and said second electrode; and
wherein at least a portion of said porous support is capable of contacting an analyte.
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7. A method for sensing analyte comprising:
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exposing a porous support comprising aprotic ionic liquid to an analyte, the aprotic ionic liquid having anions selected from the group consisting of trifluoromethylsulfonate (CF3SO3−
), bis(trifluoromethylsulfonyl)imide ((CF3SO2)2N−
), bis(perfluoroethylsulfonyl)imide ((CF3CF2SO2)2N−
) and tris(trifluoromethylsulfonyl)methide ((CF3SO2)3C−
);
applying a controlled voltage difference across the porous support; and
thereaftermeasuring the current flowing across the porous support. - View Dependent Claims (8)
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9. A method for sensing analyte comprising:
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exposing a porous support comprising aprotic ionic liquid to an analyte, the aprotic ionic liquid having anions selected from the group consisting of trifluoromethylsulfonate (CF3SO3−
), bis(trifluoromethylsulfonyl)imide ((CF3SO2)2N−
), bis(perfluoroethylsulfonyl)imide ((CF3CF2SO2)2N−
) and tris(trifluoromethylsulfonyl)methide ((CF3SO2)3C−
);
applying a controlled electrical current across the porous support; and
thereaftermeasuring the voltage across the porous support. - View Dependent Claims (10)
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11. A sensor comprising:
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a first electrode;
a second electrode;
a porous support in electrical communication with said first electrode and said second electrode, said porous support comprising aprotic ionic liquid having a glass transition temperature, Tg, of less than about −
40 degrees Celsius;
an electrical power source for providing a voltage difference between said first electrode and said second electrode; and
an ammeter in electrical communication with said first electrode and said second electrode;
wherein at least a portion of said porous support is capable of contacting an analyte.
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12. A sensor comprising:
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a first electrode;
a second electrode;
a porous support in electrical communication with said first electrode and said second electrode, said porous support comprising aprotic ionic liquid that does not decompose when heated to a temperature of about 100 degrees Celsius under a vacuum of about 10−
5 torr for about 72 hours;
an electrical power source for providing a voltage difference between said first electrode and said second electrode; and
an ammeter in electrical communication with said first electrode and said second electrode;
wherein at least a portion of said porous support is capable of contacting an analyte.
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Specification
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Current AssigneeLos Alamos National Security LLC (Government of the United States of America)
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Original AssigneeRegents of the University of California (University of California)
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InventorsSmith, Wayne H., Chlistunoff, Jerzy, Burrell, Anthony K., Warner, Benjamin P., Hall, Simon B.
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Application NumberUS11/151,150Publication NumberTime in Patent OfficeDaysField of SearchUS Class Current205/775CPC Class CodesG01N 27/26 by investigating electroche...
