Growing TiO3-based pillars by chemisorbed nanotitania followed by annealing

Vilas G. Pol, Arie Zaban

    Research output: Contribution to journalArticlepeer-review

    11 Scopus citations


    A templateless, efficient, and straightforward method is developed for die growth of TiO2-based microstructures perpendicular to die desired substrate. A variety of substrates coated by nanoparticles of TiO2, soaked in a 5 M NaOH solution for 2 h (chemisorption), and further annealed under air at 450°C (4 h) fabricated a novel oriented, TiO2-based microarray comprised of nanotubes. Moreover, we verified that there is no need for both autoclaving (hydrothermal synthesis) and maintaining a lengthy reaction time for the growth of TiO2-based structures. The effect of several reaction parameters (solvent concentration, substrate nature, thickness and density of the seed nanotitania, and deposition of amorphous or crystalline TiO2) on the growth of the titania array is also demonstrated. The experimental results yielded the crystalline structure of anatase TiO 2, and die previously anticipated mechanism for titania nanotubes synthesized by a soft chemical route supports me proposed growth mechanism. The electrodes grown on fluorine-doped tin oxide (FTO) glass substrates showed a moderate performance in dye-sensitized solar cells.

    Original languageEnglish
    Pages (from-to)14574-14578
    Number of pages5
    JournalJournal of Physical Chemistry C
    Issue number39
    StatePublished - 4 Oct 2007


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