  We report the first principle theory-based study of stability, electronic
structure and optical properties of cluster assembled materials in various 1D,
2D and 3D nanostructures using a cage-like Cd9Te9 cluster as the super-atom.
The bulk 3D self-assemblies form in 2D stacked structures for different cubic
lattices. The face centered stacking is the most stable as compared to the
simple cubic, body centered and zinc blende type stackings. The 2D stacks are
formed as cluster assembled monolayers and the monolayer derived from the face
centered structure is most stable. Further, the cluster chains (or wires) with
more number of inter-cluster bonds are also seen to be dynamically stable. The
electronic structure, bandgap, dielectric constant and absorption spectra along
with the phonon dispersions are discussed for these self-assembled
nanostructures.
