Mona Ali. A, Rawia Abd Elgani Elobaid, Abdalsakhi S M.H, Ali Soliman, Nafisa Badar Eldeen and Mubarak Dirar 2021. Effect of Different Concentration of cobalt Oxide (CoO) and Titanium Dioxide (TiO2) on Diameter of Carbon nanotubes. International Scientific Survey Journal. 4, 1 (May 2021), 1–6.