Disposable devices designed for single and/or multiple reliable measurements over a short duration have attracted considerable interest recently. However, these devices often use non-recyclable and non-biodegradable m...Disposable devices designed for single and/or multiple reliable measurements over a short duration have attracted considerable interest recently. However, these devices often use non-recyclable and non-biodegradable materials and wasteful fabrication methods. Herein, we present ZnO nanowires(NWs) based degradable high-performance UV photodetectors(PDs) on flexible chitosan substrate. Systematic investigations reveal the presented device exhibits excellent photo response, including high responsivity(55 A/W), superior specific detectivity(4×10^(14) jones), and the highest gain(8.5×10~(10)) among the reported state of the art biodegradable PDs. Further, the presented PDs display excellent mechanical flexibility under wide range of bending conditions and thermal stability in the measured temperature range(5–50 ℃).The biodegradability studies performed on the device, in both deionized(DI) water(pH≈6) and PBS solution(pH=7.4),show fast degradability in DI water(20 mins) as compared to PBS(48 h). These results show the potential the presented approach holds for green and cost-effective fabrication of wearable, and disposable sensing systems with reduced adverse environmental impact.展开更多
基金supported in part by Engineering and Physical Science Research Council (EPSRC) through Engineering Fellowship (EP/R029644/1)Hetero-print Programme Grant (EP/R03480X/1)European Commission through grant references (H2020-MSCAITN2019-861166)。
文摘Disposable devices designed for single and/or multiple reliable measurements over a short duration have attracted considerable interest recently. However, these devices often use non-recyclable and non-biodegradable materials and wasteful fabrication methods. Herein, we present ZnO nanowires(NWs) based degradable high-performance UV photodetectors(PDs) on flexible chitosan substrate. Systematic investigations reveal the presented device exhibits excellent photo response, including high responsivity(55 A/W), superior specific detectivity(4×10^(14) jones), and the highest gain(8.5×10~(10)) among the reported state of the art biodegradable PDs. Further, the presented PDs display excellent mechanical flexibility under wide range of bending conditions and thermal stability in the measured temperature range(5–50 ℃).The biodegradability studies performed on the device, in both deionized(DI) water(pH≈6) and PBS solution(pH=7.4),show fast degradability in DI water(20 mins) as compared to PBS(48 h). These results show the potential the presented approach holds for green and cost-effective fabrication of wearable, and disposable sensing systems with reduced adverse environmental impact.
基金supported by the Open Research Fund of Center for Civil Aviation Composites of Donghua University and Shanghai Collaborative Innovation Center of High Performance Fibers and Composites (Province-Ministry Joint)the National Key Research and Development Program of China (2021YFC2101800)+8 种基金the National Natural Science Foundation of China (52173117, 52073049, 21991123, and 52075093)China Postdoctoral Science Foundation (2021M702898)the Natural Science Foundation of Shanghai (22ZR1400700 and 20ZR1402500)Shanghai Rising-Star Program (21QA1400200)the Belt & Road Young Scientist Exchanges Project of Science and Technology Commission Foundation of Shanghai (20520741000)the Science and Technology Commission of Shanghai Municipality (20DZ2254900)the Fundamental Research Funds for the Central Universities (2232021G-02)DHU Distinguished Young Professor Program (LZA2019001)the Open Project of Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices (KJS1902).
