posted on 2020-06-16, 15:10authored byChunhui Dai, Lianbi Li, Daniel Wratkowski, Jeong-Hyun Cho
Sequence plays an important role
in self-assembly of 3D complex
structures, particularly for those with overlap, intersection, and
asymmetry. However, it remains challenging to program the sequence
of self-assembly, resulting in geometric and topological constrains.
In this work, a nanoscale, programmable, self-assembly technique is
reported, which uses electron irradiation as “hands”
to manipulate the motion of nanostructures with the desired order.
By assigning each single assembly step in a particular order, localized
motion can be selectively triggered with perfect timing, making a
component accurately integrate into the complex 3D structure without
disturbing other parts of the assembly process. The features of localized
motion, real-time monitoring, and surface patterning open the possibility
for the further innovation of nanomachines, nanoscale test platforms,
and advanced optical devices