Husam R. Abed · Ali A. Yousif · Alwan M. Alwan · Nadir F. Habubi
الملخص الانجليزي
In the present study, a procedure of the inserting of SnO2:
CuO nanoparticles with different CuO nanoparticles contents
within a macroporous silicon layer (macroPSi) gas sensor was prepared and successfully investigated. The macroPSi was
effectively fabricated by laser assisted etching process, and CuO nanoparticles loaded with SnO2
with a high value of surface
area were successfully synthesized by the spray pyrolysis method. Atomic Force Microscopy (AFM) and Field Emission
Scanning Electron Microscopy (FE-SEM) manifested a novel morphology for CuO Bucky particles inside the pores and a
nano nail like structure for SnO2
with a small average grain size of CuO Bucky particles with 30% content. This morphology
of nanocomposites improved the sensing performance for NH3
gas. A higher sensitivity with a very swift response and
recovery times of 4 s and 55 s, respectively, was obtained with 150 ppm of NH3
gas at the room temperature. This improvement
in gas sensor performance is strongly related to the higher specific surface areas and smaller particle size with a higher
surface roughness of SnO2
and CuO nanoparticles within the nanocomposites.
حسام رفعت عبد | Husam Rifaat Abed | 2686