TY - EJOUR
AU - Dheyab, Amer Badr
AU - Mohammed, Safaa Idan
AU - Mustafa, Marwa Kamal
AU - Fayadh, Rasha Saad
AU - Hussein, Noor Luay
PY - 2023
DA - November
TI - Fabrication and characterization of PSi/nanometal hybrid structures by laser for CO gas sensor
T2 - Journal of Theoretical and Applied Physics
VL - 14
L1 - https://oiccpress.com/journal-of-theoretical-and-applied-physics/article/fabrication-and-characterization-of-psi-nanometal-hybrid-structures-by-laser-for-co-gas-sensor/
DO - 10.1007/s40094-020-00368-3
N2 - AbstractMesoporous silicon (mesoPSi) layers fabricated by the photoelectrochemical etching (PECE) method in hydrofluoric acid (HF) are active as carbon monoxide gas sensors. The modified porous silicon (PSi) can be used with noble metals to manufacture an effective gas sensor. Embedded gold, platinum, and palladium nanoparticles Au, Pt, and Pd-NPs could modify the surface morphology of mesoPSi and form mesoPSi/AuPtPd-NPs hybrid structures through a simple and dipping process in fixed salt concentrations. The morphology of the hybrid structures has been studied using scanning electron microscopy and X-ray diffraction. The prepared gas sensor has measured the electrical characteristics at room temperature. Shape, nanoparticle size, and specific surface area strongly influenced the current–voltage characteristics. The results show that Au, Pd, and Pt-NPs sizes prepared by the dipping process for mesopore-like structures were in the range from 0.64 to 7.53 nm. Besides, considerable improvements in the response, recovery times and sensitivity of gas sensor were noticed when decreasing the incorporated Au, Pd, and Pt-NPs to the mesoPSi matrix.
IS - 2
PB - OICC Press
KW - Photoelectrochemical, SEM, AuPtPd, Gas sensing, MesoPSi, NPs hybrid structures 
EN -