Organic template directed growth of one- and two-dimensional GeX2/templatesuperstructures (X=S, Se)

We have obtained GeX2 nanostructures (X = S, Se) via a template-directed sy nthesis using organic templates and inorganic precursors. Depending on the choice of organic template, the GeS2/template superstructures are either la mellar or have a two-dimensional superstructure of hexagonal symmetry. All GeSe2/template superstructures are lamellar. The superstructure periods are typically below 5 nm. The microscopic structure of the IV-VI2 walls is rev ealed by Raman spectroscopy. In the GeSe2-based superstructures, the semico nductor layers consist of an amorphous network of GeSe4 tetrahedrons. In th e GeS2-based nanostructures, the walls are a network of adamantan-like Ge4S 10 cage units. (C) 2000 American Institute of Physics. [S0003-6951(00)00752 -X].