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In this study, a simple and cost-effective technique to fabricate a plastic optical fiber sensor for the dual sensing of hydrogen peroxide (H2O2) and dissolved oxygen (DO) was described. The optical fiber dual sensor consisted of CdSe/ZnS core–shell quantum dots (QDs), with oxygen indicators coated on the fiber end of the sensor. An ethyl cellulose (EC) matrix doped with CdSe/ZnS QDs and tris(4,7-diphenyl-1,10-phenanthroline)ruthenium(II)...
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