Abstract
A simple and reliable ultraviolet sensing method with high sensitivity is proposed. ZnO and ZnO composite graphene are successfully prepared by the hydrothermal method. The optical fiber sensor is fabricated by coating the single-mode-taper multimode-single-mode (STMS) with different shapes of ZnO. The effects of the sensitivity of ultraviolet sensors are further investigated. The results show that the sensor with ZnO nanosheets exhibits a higher sensitivity of 357.85 pm/nW·cm−2 for ultraviolet sensing ranging from 0 to 4 nW/cm2. The ultraviolet characteristic of STMS coated flake ZnO composite graphene has been demonstrated with a sensitivity of 427.76 pm/nW·cm−2. The combination of sensitive materials and optical fiber sensing technology provides a novel and convenient platform for ultraviolet detection technology.
Highlights
Ultraviolet detection technology has a wide range of applications
During the exploration phase of the experiment, we found that it took 4 min for the spectrum to reach a stable state after each change in ultraviolet radiation illumination
Because flake ZnO composite graphene has a specific surface area to contact with the external ultraviolet radiation luminance changes, the electron transfer increases and the refractive index changes
Summary
Ultraviolet detection technology has a wide range of applications. It is not susceptible to long-wave electromagnetic interference, working in a strong electromagnetic radiation environment, and has good concealment. ZnO-based ultraviolet detection technology has been widely reported. It has the advantages of high responsiveness, high quantum efficiency, high response speed and good signal-to-noise ratio [9,10]. As a new two-dimensional material, graphene has a large specific surface. Optical fiber sensing technology In is tcombined with ultraviolet material to multimode-single-mode (STMS). The fiber structure of single-mode-taper their sensitivity to ultraviolet byisstudying thewith shiftZnO of interference spectra. Graphene to determine multimode-single-mode combined and ZnO composite their sensitivity to ultraviolet by studying the shift of interference spectra The fiber structure of single-mode-taper their sensitivity to ultraviolet byisstudying thewith shiftZnO of interference spectra. graphene to determine multimode-single-mode combined and ZnO composite their sensitivity to ultraviolet by studying the shift of interference spectra
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