A "double-templating" approach was elaborated to produce. meshed nanoshells made of semiconductor material in a two step process. First, DNA adsorption is templated by spherical nanobeads, and second, DNA is mineralized by an inorganic material (CdS). Dissolution of the core beads leaves nanometer-size shells, the surface structure of which represents a mineralized network of DNAs. This Method demonstrates the opportunity to metalize an arbitrary three-dimensional template by depositing a network of nanowires.