We have developed a material called ‘M-Ink’, the colour of which is tunable by magnetically changing the periodicity of the nanostructure. The magnetic particle within this material, which is a key factor of color changes is self assembled in optimized chemosynthesis condition. This controllable and scalable structural colour printing technic may have a significant impact on colour production for general consumer goods.
Hyoki Kim, Jianping Ge, Junhoi Kim, Sung-Eun Choi, Hosuk Lee, Howon Lee, Wook Park, Yadong Yin and Sunghoon Kwon, "Structural color printing using a magnetically tunable and lithographically fixable photonic crystal", Nature Photonics, 3, 534-540, 2009. [PDF]