L. Jawad R, S. Abbas R. Exploring the Variation of Urbach Energies Between Anatase and Rutile Phases of TiO2 Nanoparticles in Polymer-Based Hybrid Composites. IHJPAS [Internet]. 2025 Apr. 20 [cited 2025 Apr. 30];38(1):186-9. Available from: https://www.jih.uobaghdad.edu.iq/index.php/j/article/view/3986