Microstructure Control of Porous Alumina Film Using Aqueous Sol Containing Trehalose
To fabricate porous and thick alumina films, we prepared an aqueous alumina hydroxide sol containing trehalose. The alumina films were deposited by dip-coating technique on glass substrates and heating at 500 °C. The maximum thickness of the film obtained by one-run dip-coating using the sol containing trehalose was over 1000 nm. The film was an aggregate of alumina particles with a diameter of 20-40 nm and pores were interstices between the particles. The porosity of alumina film can be controlled in the range of 48-65 % by changing trehalose concentration in the dip-coating solution.
K. Katayama, K. Kato, T. Takenaka, M. Takata and K. Shinozaki
T. Miki et al., "Microstructure Control of Porous Alumina Film Using Aqueous Sol Containing Trehalose", Key Engineering Materials, Vol. 350, pp. 7-10, 2007