Influence of annealing atmosphere on the structural phase changes and optical properties of TiO2 nanoparticlesBhagya Uthaman, Anjali Krishnan, Sona S. Prabha and V.R. AkshayEPJ Web Conf., 356 (2026) 01018DOI: https://doi.org/10.1051/epjconf/202635601018