09 خرداد 1403
محمود ناصري

محمود ناصری

مرتبه علمی: دانشیار
نشانی:
تحصیلات: دکترای تخصصی / فیزیک-نانو
تلفن: 08132355404
دانشکده: دانشکده علوم پایه

مشخصات پژوهش

عنوان
Hierarchical Sphere‑Like ZnO–CuO Grown in a Controlled Boundary Layer for High‑Performance H2S Sensing
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
Hierarchical sphere · ZnO–CuO · gas sensor · H2S · boundary layer
سال
2021
مجله Journal of Electronic Materials
پژوهشگران محمود ناصری

چکیده

A highly sensitive sensor for hydrogen sulfide based on a p–n junction between metal-oxide semiconductors is reported herein. Uniform ZnO–CuO hollow spheres were synthesized by a combination of chemical and physical methods. To deposit a uniform ZnO layer, the silicon substrate was tilted from 0° to 40° relative to the gas flow direction during the growth process. Next, a low concentration of CuO nanoparticles was decorated onto the ZnO nano/microstructure using physical vapor deposition (PVD). The ZnO–CuO heterojunction sensor showed a remarkable response of 112 at 100 ppm H 2 S and 158°C. The response time and recovery time were calculated to be 8 s and 35 s, respectively. The response to H2S concentration increases of 100 ppm was as high as 3.5 times compared with ZnO alone. Finally, a sensing mechanism is proposed and discussed.