Researchers are one step closer to creating an "invisibility cloak" through active camouflage.Seung Hwan Ko of Seoul National University and colleagues have created a <a href="https://www.nature.com/articles/s41467-021-24916-w" class="on">chameleon-inspired robot with thermochromic liquid crystal in its skin</a>. The crystals change color in response to changing temperature, and take on different shades of green, red, and blue at specific temperatures.&nbsp;Below the outer skin layer, Ko and his team wired up stacks of transparent polyimide film coated with silver nanowires that heat up when an electric current passes through them.As a sensor below the chameleon-bot notices the change in background color and signals the heating element to heat up or cool down to the requisite temperature to cause the color change.#chameleon #camouflage #activecamouflage #thermochromicliquidcrystal #SeoulNationalUniversity #chameleonbot #artificialskinVideo and images: Seung Hwan Ko et al.

The Artificial Chameleon Skin is composed of thermochromic liquid crystal layer, black ink layer, stacked silver nanowire (Ag NW) heater layers.

The Chameleon-bot with 7 multilayered flexible Artificial Chameleon Skin patches.

Chameleon-bot in various states: off, green only and camouflage mode (both red and green)

Instantaneous color change of the Chameleon-bot in response to changes in the background color.