  Establishing precise control over the shape and the interactions of the
microscopic building blocks is essential for design of macroscopic soft
materials with novel structural, optical and mechanical properties. Here, we
demonstrate robust assembly of DNA origami filaments into cholesteric liquid
crystals, 1D supramolecular twisted ribbons and 2D colloidal membranes. The
exquisite control afforded by the DNA origami technology establishes a
quantitative relationship between the microscopic filament structure and the
macroscopic cholesteric pitch. Furthermore, it also enables robust assembly of
1D twisted ribbons, which behave as effective supramolecular polymers whose
structure and elastic properties can be precisely tuned by controlling the
geometry of the elemental building blocks. Our results demonstrate the
potential synergy between DNA origami technology and colloidal science, in
which the former allows for rapid and robust synthesis of complex particles,
and the latter can be used to assemble such particles into bulk materials.
