Patterned self-assembly of gold nanoparticles on chemical templates fabricated by soft UV nanoimprint lithography
Article appeared in: Nanotechnology 22 (2011) 295301 (7pp); doi:10.1088/0957-4484/22/29/295301
S. Gilles, C. Kaulen, M. Pabst, U. Simon, A. Offenhäusser, and D. Mayer
Published: September 2011
Chemical templates for the patterned immobilization of gold nanoparticles were fabricated by soft UV nanoimprint lithography. These chemical templates were successfully used for the self-assembly of citrate stabilized gold nanoparticles based on electrostatic template – particle interactions. By reducing the ionic strength of the solution, one- and zero-dimensional particle assemblies were generated on sub-100-nm template structures. In this way, we found a rather simple method for the fabrication of high resolution gold nanoparticle assemblies, by combining a bottom-up and a top-down approach. The nanoparticle assemblies may represent precursor structures for local chemical surface modifications, for instance by exchanging the ligands of the gold nanoparticles.