8.4. NANOSTRUCTURES IN ZEOLITE CAGES
223
Figure 8.35. Sketch of zeolite-Y structure showing six sodalite cages (diameter -0.5 nm)
occupied by Cd4S4 tetrahedral clusters, and one empty supercage (diameter -1.3 nm) in the
center. (From H. Herron and Y. Wang, in Nanornaterials, Synthesis, Properties and Applications,
A. S. Edelstein, ed., IOP, Bristol, UK, 1996, p. 73.)
100
80
60
40
20
0
I
200
300
400
500
600
Wavelength(nm)
Figure 8.36. Reflectance spectra of CdS clusters in zeolite-Y, with CdS loadings of 1, 3, 5, and
20wt% corresponding to curves 1, 2, 3, and 4, respectively. [From W. Chen et al., J. Lurnin. 71,
151 (1997).]