Plasmonic color laser printing has several advantages over pigment-based technology, including the absence of ink and toner and the production of nonfading colors. However, the current printing method requires a template that should be prepared via nanofabrication processes, making it impractical for large-area color images. In this study, we show that laser-induced dewetting of metal thin films by a nanosecond pulsed laser can be effectively utilized for plasmonic color printing. Ag, Au, and their complex films deposited on a glass substrate were dewetted into different surface structures such as droplets, rods, and ripples, depending on the incident laser energy. The resulting morphological evolutions could be explained by Rayleigh and capillary instabilities. For a bimetallic film comprising Ag nanowires coated on a Au layer, a few different plasmonic colors were generated from a single sample simply by changing the laser fluence. This provides a possible method for implementing plasmonic color laser printing without using a prepatterned template.
Bibliographical noteFunding Information:
This work was supported by the R&D convergence program of the National Research Council of Science & Technology of the Republic of Korea (no. CAP-16-10-KIMS) and the National Research Foundation of Korea (NRF) grants funded by the Korean government (NRF-2015R1A2A1A15053000 and 2015R1D1A1A09058787).
© Copyright 2018 American Chemical Society.
All Science Journal Classification (ASJC) codes
- Materials Science(all)