High-resolution contact printing with dendrimers

We have used amine-terminated polyamidoamine (PAMAM) dendrimer generation 4 as ink for contact printing. Periodic dendrimer lines with widths of 140 nm and interline widths of 70 nm were printed directly on a silicon substrate. Without obvious molecular diffusion during printing, the printed pattern is only determined by the conformal contact area, which is in turn determined by the mechanical properties of elastomeric stamp.