LANGMUIR-BLODGETT MANIPULATION OF SIZE-SELECTED CDSE NANOCRYSTALLITES

The Langmuir-Blodgett (LB) technique is used to deposit monolayers of nearly monodisperse nanometer-size CdSe crystallites (quantum dots) on to various substrates. Size-selected CdSe nanocrystallites capped with trioctylphosphine oxide are directly applied onto the water surface o f a LB trough and serve as the LB-active species. Absorption and lumin escence studies of monolayers transferred onto glass slides indicate t hat the monolayers retain the general optical properties of isolated c rystallites. Transmission electron micrographs of monolayers on amorph ous carbon show the formation of two-dimensional hexagonal close-packe d domains.