Speaker
Prof.
Tim Liedl
(LMU München)
Description
The directed metallization of DNA origami nanostructures
could give
rise to self-assembling materials with novel optical and
electronic
properties. We show that three-dimensional (3D) DNA origami
structures
can be converted into gold nanoparticles of designed shapes
by a two-
step metallization process: Positively charged 1.4 nm gold
nanoclusters adsorb to the negatively charged DNA objects
followed by
electroless deposition of gold from solution. Using this
strategy,
nanoparticles with a narrow size distribution and
controllable shapes
and dimensions are created. This site-directed metallization
constitutes a general and easy route for shape-defined
growth of
continuously metallized objects, such as nanorods,
nanodonuts, cuboids
and kites of controlled sizes and lengths.
Author
Prof.
Tim Liedl
(LMU München)
