M. Wu et al., PREPARATION AND CHARACTERIZATION OF ULTRAFINE ZINC-SULFIDE PARTICLES OF QUANTUM CONFINEMENT, Chemical physics letters, 224(5-6), 1994, pp. 557-562
We describe the preparation and characterization of highly monodispers
ed, stabilized and size-fixed ZnS Q-particles. In these samples, small
ZnS particles were well accommodated by beta-cyclodextrin cavities. T
he included ZnS particle size was determined to be 9.7-12.2 angstrom b
y scanning tunnel microscope, which is consistent with the inner diame
ter of the cyclodextrin cavity. The microcrystalline structure was ide
ntified to be of sphalerite-type by X-ray diffraction. A very sharp an
d blue-shift exciton peak of optical absorption was observed at the 24
5-250 nm band and was well accounted for by a recent theoretical model
based on a tight-binding approximation.