Qahtan N. Abdullah, is an Assistant Professor at Tikrit University college of Education for Pure Science, and lecturer in physics department in Iraqi universities. Dr. Q.N.Abdullah has over 10 scientific papers published in high quality journal. He is recognized expert in many areas of solid state physics including MOS devices, growth and characterization of nitride group, gallium oxide, indium oxide, and zinc oxide. Recent publications include a paper on Pt-decorated GaN nanowires with significant improvement in H2 gas-sensing performance at room temperature. Dr. Q.N. Abdullah holds a BS, MSc in solid state physics from Al-Mustansiriyah University (Baghdad—Iraq) 1995 and 2001. Recently, he completed his Ph.D. in solid state physics in University Sains Malaysia / school of physics. He works many years in Institute of Nano-Optoelectronics Research and Technology (INOR) and developed hydrogen gas sensors based on gallium nitride nanowires and gallium oxide Nanobelts.