Figure 1. Digital Direct Metal Patterning (DDMP) Process on a Flexible Substrate at Room Temperature and Atmospheric Pressure without Using Any Vacuum Deposition and Photolithography Processes.

a, TEM image of SAM coated Ag NPs synthesized via two phase method. Inset picture shows the schematics of the SAM coated Ag NP. b, Melting characteristics of the Ag NPs at various heating temperature; resistance change (blue), thermo gravimetric analysis (green) and differential scanning calorimetry (purple) in left graph, and TEM images (right). c, DDMP process schematics; (i) a polymer substrate preparation, (ii) Ag NP ink coating on a polymer substrate, (iii) laser scanning and local melting of the printed Ag NP ink film, (iv) washing out non-laser-processed Ag NPs to leave laser-processed Ag patternings on a polymer substrate. Middle row shows the cross section and bottom row shows the top view.