Abstract
Most Morpho butterfly wings are vividly iridescent, which means that the wings appear to change color as the angle of view changes. Wing scales were used as templates and could be plated successfully with a homogeneous layer of magnetic Co metal through a series of chemical treatments and in situ synthesis so that the iridescent characteristics can be used in real applications. The thin layer of metal Co nanoparticles provides the wing scales with iridescent and magnetic properties. In this investigation, we show that the Co-plated wing scales can be moved from a flat to an upright position when they are exposed to an externally applied magnetic field. This property is fundamental for the design of a new conceptual device, the magnetic-light switch.
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