  In two-dimensional van der Waals (vdWs) materials, the relative twist angle
between adjacent layers not only controls their electronic properties, but also
determines their stacking energy. This effect makes it much easier to realize
energetically favorable configurations of the vdWs materials, for example,
Bernal-stacked structure of bilayer graphene. Here we demonstrate that we can
controllably tailor adhesive energy landscape of graphene nanostructures on
graphene and stabilize the system with tunable twist angle by using a
one-dimensional tilt grain boundary (GB). The area ratio with different
stacking orders separated by tilt GB is continuously tuned, which provides a
new degree of freedom to tailor the energy landscape of the system. Due to the
different stacking orders separated by the tilt GB, we can repeatedly fold and
unfold the graphene nanostructure exactly along the one-dimensional boundary,
demonstrating the ability to realize atomically precise graphene origami.
