A chiral structure comprises an elongate strip in a rolled configuration about a longitudinal axis, where the rolled configuration is a helical configuration comprising a non-zero helix angle. The elongate strip comprises an amorphous or a polycrystalline material. A rolled-up structure with modulated curvature comprises a sheet comprising an amorphous or polycrystalline material in a rolled configuration about a longitudinal axis, where the sheet comprises a thickness t and the rolled configuration comprises an inner diameter D. An inner diameter-to-thickness ratio D/t of the rolled-up structure is no greater than about 40.
FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
 This invention was made with government support under contract number ECCS 1309375 awarded by the National Science Foundation and contract number DE-F002-07ER46471 awarded by the Department of Energy. The government has certain rights in the invention.