ABSTRACT
Figure 5.4 SEM images of nanocolumnar arrays deposited under different oxygen pressures. (a, b) 0.1 Pa, (c, d) 40.0 Pa, (e, f) 66.5 Pa, and (g, h) 93.1 Pa. Images (a), (c), (e), and (g) are taken from the top, and images (b), (d), (f), and (h) are side views taken at a tilting angle of 45°. Reproduced from J. Mater. Chem., 19, pp. 8366-8371 (2009). Copyright © 2009, Royal Society of Chemistry.
