Fabrication of Nanoparticle Films Applying Directed Self-assembly

The fabrication process of large-area self-assembled monolayers of gold nanoparticles was investigated, focusing on the effect of the solvent applying dip-coating system at fast rates (mm/sec). The uniformity of the particle array formed on the substrate was improved by polymer coating on the nanoparticle surface that prevented movement of particles during the drying process. We have also examined the effects of solvent in suspension on formation of nanoparticle films The uniformity of films on the substrate was improved by selecting methyl ethyl ketone (MEK) as a solvent. In addition, it was found that the solvent annealing with MEK vapor promoted rearrangement of nanoparticle alignment in the films Self-assembling performances of nanoparticles were also demonstrated by applying topographical pattern.