Duaa Ali Hashim received her doctorate in the field of laser technology and electro-optics from the Department of Applied Sciences at the University of Technology for her thesis tagged:

"Preparation and Investigation of the Performance of Hybrid Gaseous Silicon Gas Sensor"

Preparation and Investigation Performance of Porous Silicon Based Hybrid Structure Gas Sensor

In the discussion held on Sunday June 16, 2019 in the hall of the late Abdul Muttalib Ibrahim Sheikh in the section.

The discussion committee consisted of Prof. Walid Khalaf, Chairman of the Board of Directors of Adawiya Jumaa, Dr. Raed Abdel Wahab, Dr. Ali Ahmed, and Dr. Essam Mohammed, members and Prof. Dr. Alwan Mohamed, Muslim Fadhel Supervisors and scientific expert Dr. Mahdi Hassan and linguistic expert AD Najem Abdul Kadhim.

Four types of this study were prepared from different sizes of pore silicon (Pores, Fuzzy Fracture, Fracture Formation, Non-Formal Gap Formation, Pore Formal Gap Formation and Pore Formal Gap Formation by Laser-Assisted Electro-Electrode Development as a Function for Laser Energy Intensity of about 10 -40 mW / cm2.

The thesis involved the manufacture of porous silicon-based hybrid gaseous sensors by integrating three types of metal nanoparticles (monochromatic, bimetal, triglyceride) into the silicon porous silicon layer by dewatering as a simple and low-cost process when salt concentration was established and time immersion.

 The properties of microbial polysaccharide silicon and gaseous sensors with hybrid compositions were investigated using an XRD (X-ray diffraction apparatus), a scanning electron microscopy (FE-SEM), diffused X-ray energy (EDS), FTIR transformations and optical pearl . (PL)

X-ray diffraction patterns of hybrid structures showed a multi-faceted (F.C.C) multi-faceted cubic structure (111) and (200) for both mono-metal and bipolar nanoparticles; The nanoparticle particles are in the direction of phase (111). The particle size decreases and the surface area increases with the increase in the rank of the metal nanoparticles, because the process is intertwined between the tops of the nanoparticles.

N The process of integrating a different number of metal nanoparticles with a pore silicon matrix is ​​an effective way to enhance the detection of different gases with low gas pressures with high stability and fast response.