1 research outputs found
Stimulated Emission Depletion Lithography with Mercapto-Functional Polymers
Surface
reactive nanostructures were fabricated using stimulated
emission depletion (STED) lithography. The functionalization of the
nanostructures was realized by copolymerization of a bifunctional
metal oxo cluster in the presence of a triacrylate monomer. Ligands
of the cluster surface cross-link to the monomer during the lithographic
process, whereas unreacted mercapto functionalized ligands are transferred
to the polymer and remain reactive after polymer formation of the
surface of the nanostructure. The depletion efficiency in dependence
of the cluster loading was investigated and full depletion of the
STED effect was observed with a cluster loading exceeding 4 wt %.
A feature size by λ/11 was achieved by using a donut-shaped
depletion beam. The reactivity of the mercapto groups on the surface
of the nanostructure was tested by incubation with mercapto-reactive
fluorophores