Husam R. Abed · Alwan M. Alwan · Ali A. Yousif · Nadir F. Habubi
الملخص الانجليزي
In this paper, a porous silicon (Psi) surface modification process, including the incorporating
of pure and CuO mixed SnO2
within a Psi layer, was investigated. A Psi layer with
a pore-like structure prepared via laser-assisted etching process with a laser illumination
intensity of (40) mW/cm2 was employed as a substrate for materialization SnO2/
CuO/
Psi nanocomposites for gas sensing application. Pure SnO2
and SnO2:
CuO nanoparticles
were synthesized via a chemical spray pyrolysis process on the Psi surface at 350 °C. The
materialization of SnO2:
CuO/Psi nanocomposites were recognized through Field-Emission
Scanning Electron Microscopy, X-ray Diffraction, Atomic Force Microscopy, and Energydispersive
X-ray Analysis. The results displayed that the morphological properties of
SnO2:
CuO nanoparticles were definitely controlled by varying the CuO contents. Different
shapes (nearly cubic shape and spherical shape) with various sizes of SnO2
and SnO2:
CuO
within the Psi surface were achieved by increasing the CuO content. SnO2:
CuO/Psi nanocomposites,
plans, grain size, average surface roughness, homogeneity and specific surface
area of SnO2:
CuO nanoparticles were considerably influenced by CuO content. The lower
grain size and higher average surface roughness and specific surface area were attained
when the percentage of CuO was about 30% within the structure of 70% SnO2:
30% CuO,
and the performance of the NH3
gas sensor revealed a short response time with a high sensitivity
of (88%).
حسام رفعت عبد | Husam Rifaat Abed | 2797