RGB color changing micropixels using magnetic nanocomposite microactuators

We propose noble magnetically tunable color changing surface composed of magnetic nanocomposite micro-actuators. The self-assembling behavior of superparamagnetic nanoparticles enables both color generation and color changing. To achieve this, we fabricate micr-sized magnetic nanocomposite actuators by repetitively fixing the assembled state of the superparamagnetic nanoparticles in a polymer matrix with a desired shape. Using this technology, we fabricate red, green and blue colored microactuators and observe their color change. This research offers very simple fabrication and operation method for color tunable surface.