Research News: The synthesis of new ''designed'' layer structures from superlattice reactants is outlined. Annealing of interwoven layers of elements within a superlattice-i.e., at greater than nanometer spacing-kinetically traps the final desired nanostructured product (see also the cover of this issue). A series of crystalline superlattices containing a niobium diselenide and titanium diselenide superstructure are used to explore the effect of the superstructure on the superconducting properties of the niobium diselenide.