TOC-38-coverWe have combined bottom-up chemical methods and top-down nanoscale patterning techniques—chemical nanofabrication—to generate patterned and free-standing transition metal chalcogenide (TMC) nanostructures. This approach is general and flexible and can produce (1) arrays of MnXy (M = Ni, Ag; X = S, Se) nanoscale structures with different shapes and sizes; (2) crossed arrays of nanostructures out of different TMC materials using a two-stage conversion process; and (3) free-standing nanostructures of NiS2 materials. We can control independently the width, height and aspect ratio of the TMC structures as well as the pitch and area (> 1 square inch) over which they are patterned.