R. S.  Hyam, Bhosale, R. K., Lee, W., Han, S. - H., Hannoyer, B., and Ogale, S. B., ?Room temperature synthesis of rutile TiO2 hierarchical nanoneedle flower morphology for dye sensitized solar cell?, Journal of Nanoscience and Nanotechnology, vol. 10, no. 9, pp. 5894-5898, 2010.