부산대학교 도서관

Disposable devices designed for single and/or multiple reliable measurements over a short duration have attracted con-siderable 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 photo-detectors(PDs)on flexible chitosan substrate.Systematic investigations reveal the presented device exhibits excellent photo response,including high responsivity(55 A/W),superior specific detectivity(4x1014 jones),and the highest gain(8.5x1010)among the reported state of the art biodegradable PDs.Further,the presented PDs display excellent mechan-ical flexibility under wide range of bending conditions and thermal stability in the measured temperature range(5-50 °C).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 ad-verse environmental impact.