LAUSR

We demonstrate structural colors produced by a simple, inexpensive, and non-toxic electrodeposition process. Asymmetric metal-dielectric-metal multilayered structures were achieved by sequential electrodeposition of smooth gold, thin cuprous oxide, and finally thin Au on conductive substrates, forming an effective optical cavity with angle-insensitive characteristics. Different colors of high brightness were achieved by simply tuning the thickness of the electrodeposited middle cavity layer. This process is compatible with highly non-planar substrates of arbitrary shape, size and roughness. This work is the first demonstration of solution-processed, electrodeposited metal-dielectric-metal film stacks and highlights the clear advantages of this approach over traditional deposition or assembly methods for preparing colored films.