M. I.  Zaki, Mekhemer, G. A. H., Fouad, N. E., Jagadale, T. C., and Ogale, S. B., ?Surface texture and specific adsorption sites of sol-gel synthesized anatase TiO2 nanoparticles?, Materials Research Bulletin, vol. 45, no. 10, pp. 1470-1475, 2010.

M. I.  Zaki, Fouad, N. E., Mekhemer, G. A. H., Jagadale, T. C., and Ogale, S. B., ?TiO2 nanoparticle size dependence of porosity, adsorption and catalytic activity?, Colloids and Surfaces A-Physicochemical and Engineering Aspects, vol. 385, no. 1-3, pp. 195-200, 2011.