Electroplated helical conductors and methods for making the electroplated helical conductors are provided. The electroplated helical conductors are made from pre-formed thermally and electrically conducting nanomembrane ribbons having non-helical or helical configurations. The dimensions and shapes of the pre-formed nanomembrane ribbons are altered and controlled by the electrodeposition of a metal film onto the surfaces of the nanomembrane ribbons.

Described are electrodeposition methods, and materials and structures prepared by electrodeposition methods, and devices prepared from the electrodeposited materials.