Selective Growth of Metal Sulfide Tips onto Cadmium
Chalcogenide Nanostructure
Pazit rukenstein
Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva
Abstract:
In our research, we demonstrate a general approach for growing selectively semiconductor nanocrystals onto the edges of elongated Cd-chalcogenide nanostructures. Our method utilize the thermal decomposition of metal – bisdiethyldithiocarbamate precursors in order to achieve selective growth onto cadmium chalcogenide nanostructure . The thermal decomposition of these inorganic complexes in the presence of an elongated template enables control over the size and composition of the resulting heterostructures. In our method, we have three types of materials onto the tips of Cd –chalcogenide nanorods including: Ag2S, Cu2S and PbS nanostructure. We show the ability of controlling the size of the tips by changing the concentration of the single precursor. We have shown that in lower concentration of metal–bisdiethyldithiocarbamate precursors, single tip growth was observed. However, increasing the concentration leads to the symmetric growth on the two tips. Further additions of single precursor form bigger spheres on the tips.
1. P. Rukenstein, I. Jen-La Plante, M. Diab, E. Chokler, K. Flomin, B. Moshofsky and T. Mokari , submitted .
