Figure 4: The schematic illustration of the principles for the fabrication of sub-100 nm gold nanowires: (a) Spin-coating of colloidal Au NPs onto the PR grating with a duty cycle of W/Λ and a modulation depth of H; (b) Annealing to above 150°C to remove the ligands; (c) Annealing to above 180°C to melt the Au NP into grating lines consisting of larger gold particles; (d) Annealing to above 350°C to re-melt the large Au particles and make them fused into homogeneous gold nanolines.