title: Gamma-Fe2O3/II-VI sulfide nanocrystal heterojunctions.
abstract: Heterostructure nanocrystals (NCs) of gamma-Fe(2)O(3) and MS (M = Zn, Cd, Hg) are synthesized. The large lattice mismatch between gamma-Fe(2)O(3) and MS NCs leads to noncentrosymmetric structures. Crystallographic planes at the heterojunctions are identified by high-resolution transmission electron microscopy. Preferential formation of trimers and higher oligomers for ZnS and dimers or isolated particles for CdS and HgS with gamma-Fe(2)O(3) NCs are observed and explained by changes in the effective mismatch between the coincidence lattices of the most commonly observed junction planes.
authors: Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
authors: Kwan-Wook
authors: KW
authors: Kwon
authors: Moonsub
authors: M
authors: Shim