Cobalt oxide nanoparticles synthesized from metal carboxylates

CHED 306

Brian S. Henderson, Brian.S.Henderson@rice.edu, Cristina Hofmann, chofmann@rice.edu, and Kenton H. Whitmire, whitmir@rice.edu. Department of Chemistry, Rice University, 6100 Main Street, Houston, TX 77005
The controlled synthesis of nanoparticles (NPs) represents a pertinent area of research due to the unique properties exhibited by particles of such size. Various studies have demonstrated that both the size and the shape of NPs can affect their various physical properties, such as optical and electromagnetic characteristics. Thus, the development of methods to control the size and shape of NPs would allow for the synthesis of NPs with specific properties for specific applications. We have had success in synthesizing manganese oxide, iron oxide, and mixed iron-manganese oxide NPs of various shapes via the decomposition of the corresponding homometallic formates in varied surfactant mixtures at elevated temperatures using Schlenk techniques. Following such successes, we have begun to synthesize NPs of cobalt oxides, as well as of mixed cobalt-iron oxides and cobalt-manganese oxides using, similar techniques. The resulting shapes and sizes of the cobalt-containing NPs were studied as a function of the reaction parameters, including the ratio of surfactant concentrations, water concentration, and the reaction time. Results on these systems will be presented.