FABRICATION AND CHARACTERIZATION OF CONCENTRIC-TUBULAR COMPOSITE MICRO-STRUCTURE AND NANOSTRUCTURE USING THE TEMPLATE-SYNTHESIS METHOD

The template-synthetic method is a general approach for preparing tubu lar micro- and nanostructures. This method has been used to prepare mi cro- and nanostructures composed of metals, carbons, semiconductors, p olymers, and Li+-intercalation materials. This paper describes the use of the template method to prepare composite tubular micro- and nanost ructures. These composite structures consist of an outer tubule of one material surrounding inner tubules of different materials. Chemical s trategies used to prepare these composite tubular structures include e lectroless deposition of Au, electropolymerization of conductive and i nsulating polymers, electrodeposition of metals and semiconductors, ca rbonization of polymer precursors, chemical vapor deposition synthesis , and sol-gel synthesis.