RESEARCH

7. Nanostructured Oxides/Chalcogenides

Transition metal oxides and metal chalcogenides are extremely important classes of compounds due to their electronic and optical properties, and also for their potential catalytic activities.

PbS, ZnS, CdS and Selenide Analogues

Chalcogenide nanomaterials are important electronic and optical nanomaterials. We are interested in how their forms and assembled states affect their properties. Thus, we have investigated their synthesis in collaboration with Prof. Somobrata Acharya (at the Indian Academy for the Cultivation of Science, Calcutta)

ZnS nanorods were doped into liquid crystal materials to improve their contrast ratios and viewing angles.
ZnS nanorods were doped into liquid crystal materials to
improve their contrast ratios and viewing angles.
Assemblies of ZnS and CdS were prepared by chemical programming of the starting materials.
Assemblies of ZnS and CdS were prepared by
chemical programming of the starting materials.

Manganese Oxide Nanomaterials

Manganese oxides are of immense industrial importance in a variety of new and old applications. Our interest in these compounds began with an initial synthesis from crystalline starting materials of lamellar manganese dioxides, which possessed a nanostructured microsphere morphology. We are currently investigating catalytic an capacitive properties of these materials.

Nanostructured microspheres of a lamellar manganese dioxide obtained by the decomposition of a quasi-1-dimensional manganese oxalate coordination complex.
Nanostructured microspheres of a lamellar manganese dioxide obtained by the decomposition of a quasi-1-dimensional manganese oxalate coordination complex.
Coordination complexes of manganese with phenol ligands can also be studied as models of manganese biomineral-ization and metal ion transport. Here a hexa-solvated Mn2+ ion is captured by ligand displacement,
Coordination complexes of manganese with phenol ligands can also be studied as models of manganese biomineral-ization and metal ion transport. Here a hexa-solvated Mn2+ ion is captured by ligand displacement,

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