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Fig. 1 | Biomaterials Research

Fig. 1

From: Chromophoric cerium oxide nanoparticle-loaded sucking disk-type strip sensor for optical measurement of glucose in tear fluid

Fig. 1

Schematic illustration of the sensor paper treated with cerium oxide nanoparticle (CNP), 3-aminopropyltriethoxysilane (APTS), and glucose oxidase (GOx). a Reaction scheme of the immobilized CNP, GOx, and glucose on the sensing paper. The sensing paper color is changed in response to tear glucose concentration from colorless Ce3+ (before reaction) to yellow Ce4+ (after reaction) due to the oxidation of cerium ions. b Captured scanning electron microscopy (SEM) images of filter paper, filter paper treated with CNPs, and filter paper treated with CNPs/APTS

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Biomaterials Research

ISSN: 2055-7124

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