Micro sensor
First Claim
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1. A process of forming a micro sensor which comprises:
- selecting a quantity of finely divided water insoluble ionic permeable hydrophylic polymer having a plurality of attachment sites thereon;
reacting said attachment sites on said polymer with a quantity of an event sensitive dye so as to attach said dye to at least some of said attachment sites on said polymer to form a dye bearing polymer;
dissolving said dye bearing polymer in a solvent;
depositing a quantity of said solvated dye bearing polymer onto an optical fiber; and
regenerating said dye bearing polymer from said solvent to form a solid matrix on said optical fiber of said regenerated dye bearing polymer.
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Abstract
A micro pH sensor is constructed by reacting powdered aminoalkylated cellulose with a dye to covalently bond the dye to the aminoalkyl groups on the cellulose. Any excess unreacted aminoalkyl groups are blocked with a blocking agent and the dye containing powdered cellulose is taken up in a solvent. A portion of the solvated dye containing cellulose is deposited in association with an optical fiber. The cellulose is regenerated into a solid matrix by acid treatment of the solvated dye containing cellulose to deposit the dye containing cellulose matrix on the optical fiber.
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Citations
24 Claims
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1. A process of forming a micro sensor which comprises:
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selecting a quantity of finely divided water insoluble ionic permeable hydrophylic polymer having a plurality of attachment sites thereon; reacting said attachment sites on said polymer with a quantity of an event sensitive dye so as to attach said dye to at least some of said attachment sites on said polymer to form a dye bearing polymer; dissolving said dye bearing polymer in a solvent; depositing a quantity of said solvated dye bearing polymer onto an optical fiber; and regenerating said dye bearing polymer from said solvent to form a solid matrix on said optical fiber of said regenerated dye bearing polymer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A process of forming a pH sensor which comprises:
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selecting a quantity of powdered cellulose having a plurality of substituent aminoalkyl groups thereon; reacting said aminoalkyl groups on said cellulose with a quantity of a pH sensitive dye so as to covalently bond said dye to at least some of said aminoalkyl groups on said cellulose to form a dye substituted cellulose; dissolving said dye substituted cellulose in a solvent; depositing a quantity of said solvated dye substituted cellulose onto an optical fiber; and regenerating said dye substituted cellulose from said solvent by acid treating said deposited quantity of said solvated dye substituted cellulose on said optical fiber to form a solid matrix of regenerated dye substituted cellulose on said optical fiber. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification