Using theoretical simulations for optical fiber surface plasmon resonance(SPR) sensors and prism-based SPR sensors coated with negative permittivity material(NPM), we investigated the effect of the permittivity of NPM...Using theoretical simulations for optical fiber surface plasmon resonance(SPR) sensors and prism-based SPR sensors coated with negative permittivity material(NPM), we investigated the effect of the permittivity of NPM on the transmitted spectrum of optical fiber SPR sensors and the reflected spectrum of prism-based SPR sensors and then obtained optimum permittivity of the NPM, which can excite the sharpest SPR spectrum in the white light region(400–900 nm).展开更多
An improved glucose sensitive membrane(GSM)is prepared by immobilizing glucose oxidase(GOD)onto a mixture of silica mesocellular foams(SiMCFs)and SiO2 nanoparticles(SiNPs)and then trapping it in a polyvinyl alcohol(PV...An improved glucose sensitive membrane(GSM)is prepared by immobilizing glucose oxidase(GOD)onto a mixture of silica mesocellular foams(SiMCFs)and SiO2 nanoparticles(SiNPs)and then trapping it in a polyvinyl alcohol(PVA)gel.The membrane is coated onto a gold-glass sheet to create a surface plasmon resonance(SPR)sensor.A series of experiments are conducted to determine the optimized parameters of the proposed GSM.For a GSM with a component ratio of SiMCFs:SiNPs=7:3(mass rate),the resonance angle of the sensor decreases from 68.57°to 63.36°,and the average sensitivity is 0.026°/(mg/dL)in a glucose concentration range of 0 mg/dL‒200 mg/dL.For a GSM with a component ratio of SiMCFs:SiNPs=5:5(mass rate),the resonance angle of the sensor decreases from 67.93°to 63.50°,and the sensitivity is 0.028°/(mg/dL)in a glucose concentration range of 0 mg/dL‒160 mg/dL.These data suggest that the sensor proposed in this study is more sensitive and has a broader measurement range compared with those reported in the literature to date.展开更多
基金supported by the Natural Science Foundation of Hubei Province,China(No.2016AAA008)
文摘Using theoretical simulations for optical fiber surface plasmon resonance(SPR) sensors and prism-based SPR sensors coated with negative permittivity material(NPM), we investigated the effect of the permittivity of NPM on the transmitted spectrum of optical fiber SPR sensors and the reflected spectrum of prism-based SPR sensors and then obtained optimum permittivity of the NPM, which can excite the sharpest SPR spectrum in the white light region(400–900 nm).
基金This work was funded by the National Natural Science Foundation of China(Grant No.61575151).
文摘An improved glucose sensitive membrane(GSM)is prepared by immobilizing glucose oxidase(GOD)onto a mixture of silica mesocellular foams(SiMCFs)and SiO2 nanoparticles(SiNPs)and then trapping it in a polyvinyl alcohol(PVA)gel.The membrane is coated onto a gold-glass sheet to create a surface plasmon resonance(SPR)sensor.A series of experiments are conducted to determine the optimized parameters of the proposed GSM.For a GSM with a component ratio of SiMCFs:SiNPs=7:3(mass rate),the resonance angle of the sensor decreases from 68.57°to 63.36°,and the average sensitivity is 0.026°/(mg/dL)in a glucose concentration range of 0 mg/dL‒200 mg/dL.For a GSM with a component ratio of SiMCFs:SiNPs=5:5(mass rate),the resonance angle of the sensor decreases from 67.93°to 63.50°,and the sensitivity is 0.028°/(mg/dL)in a glucose concentration range of 0 mg/dL‒160 mg/dL.These data suggest that the sensor proposed in this study is more sensitive and has a broader measurement range compared with those reported in the literature to date.
