Photonic crystals have gathered great importance in recent years. In particular macroporous materials (inverse opals) show interesting properties as photonic crystals. Ordered macroporous titanium dioxide (TiO2) is made using polystyrene spheres as a template. Titania is chosen for its high refractive index (>2.5). Following an already known technique [E.G. Judith, J. Wijnhoven, W.L. Vos, Science 281 (1998) 802; B.T. Holland, C.F. Blanford, A. Stein, Science 281 (1998) 538; B.T. Holland, C.F. Blanford, T. Do, A. Stein, Chem. Mater. 11 (1999) 795] large-scale order in macroporous TiO2is obtained both using the 778 and the 3190 nm beads as documented by optical microscope and SEM images. These structures would lead to applications in the mid-infrared range.
- Inverse opals
- Macroporous materials
- Photonic crystals
Lanata, M., Cherchi, M., Zappettini, A., Pietralunga, S. M., & Martinelli, M. (2001). Titania inverse opals for infrared optical applications. Optical Materials, 17(1-2), 11-14. https://doi.org/10.1016/S0925-3467(01)00013-1