The effect of changing the nano size on the absorption coefficient and the energy gap of crushed Na Cl samples

Mahmoud Hassan Osman Fadl; Mubarak Dirar Abd-Alla; Fatma Osman Mahmoud Mohamed; Faiz M. B. Elshafia; HassabAlla M.A.Mahmoud

Authors

Mahmoud Hassan Osman Fadl Department of physics, Faculty of Science, Sudan University of Science and Technology, Khartoum, Sudan.
Mubarak Dirar Abd-Alla Department of physics, Faculty of Science, Sudan University of Science and Technology, Khartoum, Sudan.
Fatma Osman Mahmoud Mohamed Department of Physics, Faculty of Science, University of Ka ssala, Sudan.
Faiz M. B. Elshafia Department of Physics, Faculty of Science & Arts, Qilwah, Al-Baha University, Kingdom of Saudi Arabia, PO Box 1988, Al-Baha. , Saudi Arabia
HassabAlla M.A.Mahmoud epartment of Physics, Faculty of Sciences and Arts Dhahran Al Janoub, King Khalid University, PO Box 9004,Abha, Saudi Arabia

Keywords:

Energy Gap, NaCl, increases

Abstract

Nanoscience represents one of the most powerful tools for controlling and changing the physical properties of matter. In this work, eight NaCl samples were prepared and crushed into different micro sizes. Their nano sizes were examined using an X-ray diffraction technique. The examination showed that the nana crystal size increases upon increasing the micro crunch size. The ultra violet-visible spectrometer results indicate that the absorption coefficient increases and the energy gap decreases when the crystal nano size and the crush size increase