30 April 1993 Nanometer optical fiber pH sensor
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Abstract
A thousandfold miniaturization of immobilized optical fiber sensors has been achieved by a near-field optical technique. This technology is based on nanofabricated optical fiber tips and near-field photoinitiated polymerization. Submicrometer pH sensors have been prepared by attaching a copolymer covalently to a silanized fiber tip surface. The sensors have demonstrated their high spatial resolving ability, excellent detection limit (zeptomoles), very fast response time (milliseconds) and good stability. The potential applications include concentration profile measurements of cytoplasms, the monitoring of fast chemical and biological reactions and other microscopic operations.
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Raoul Kopelman, Raoul Kopelman, Weihong Tan, Weihong Tan, Zhong-You Shi, Zhong-You Shi, } "Nanometer optical fiber pH sensor", Proc. SPIE 1796, Chemical, Biochemical, and Environmental Fiber Sensors IV, (30 April 1993); doi: 10.1117/12.143510; https://doi.org/10.1117/12.143510
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