STRONG QUANTUM CONFINEMENT EFFECTS IN SEMICONDUCTORS - FES2 NANOCLUSTERS

High quality, size-selected, nano-size clusters of FeS2 have been succ essfully grown inside inverse micellar cages and their optical absorpt ion studied. Remarkable structure in the absorption spectrum is observ ed and large blue shifts in the absorption edge and other spectral fea tures are observed upon crossing from the weak to strong quantum confi nement regimes with decreasing cluster size. The bandgap appears to re main indirect down to the smallest cluster size studied (2 nm).