Cerium oxide nanoparticle regenerative free radical sensor
First Claim
1. An electrochemical sensor system for sensing free radicals or materials which generate free radicals in solution, comprising:
- a working electrode, said working electrode having a coating layer thereon comprising a plurality of cerium oxide nanoparticles;
a counter electrode, wherein a solution to be analyzed provides electrolytes to electrically couple said working electrode to said counter electrode, andelectronics electrically coupled to at least one of said working and said counter electrode for measuring and amplifying an electrical current signal generated by reduction or oxidation occurring at said working electrode,wherein an average size of said cerium oxide nanoparticles is between 1 and 20 nm.
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Abstract
An electrochemical sensor system for sensing free radicals or materials which generate free radicals in solution includes a working electrode coated with a plurality of cerium oxide nanoparticles and a counter electrode. A solution to be analyzed provides electrolytes to electrically couple the working electrode to the counter electrode. Electronics are connected to at least one of the working and counter electrodes for measuring and amplifying an electrical current signal generated by reduction or oxidation occurring at the working electrode, wherein in a presence of free radicals an electrical current signal flows between the working electrode and the counter electrode. The system can be used to sense the presence of hydrogen peroxide.
7 Citations
16 Claims
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1. An electrochemical sensor system for sensing free radicals or materials which generate free radicals in solution, comprising:
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a working electrode, said working electrode having a coating layer thereon comprising a plurality of cerium oxide nanoparticles; a counter electrode, wherein a solution to be analyzed provides electrolytes to electrically couple said working electrode to said counter electrode, and electronics electrically coupled to at least one of said working and said counter electrode for measuring and amplifying an electrical current signal generated by reduction or oxidation occurring at said working electrode, wherein an average size of said cerium oxide nanoparticles is between 1 and 20 nm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An electrode for sensing free radicals or materials which generate free radicals in solution, comprising:
an electrically conducting core material, said core having a coating layer thereon comprising a plurality of cerium oxide nanoparticles having an average size of between 1 and 20 nm. - View Dependent Claims (12)
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13. A method of sensing free radicals, comprising the steps of:
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providing a sensor electrode for sensing free radicals or materials which generate free radicals in solution, comprising an electrically conducting core material, said core having a coating layer thereon comprising a plurality of cerium oxide nanoparticles having an average size of between 1 and 20 nm; and positioning said sensor electrode proximate to a solution or medium having an associated solution to be analyzed, said sensor electrode electrically coupled to a counter electrode; measuring an electrical current signal generated by reduction or oxidation occurring at said sensor electrode, and determining a presence of free radicals in said solution or said medium based on said current signal. - View Dependent Claims (14, 15, 16)
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Specification