Fri Dec 06 08:20:57 UTC 2024: ## Chinese Scientists Achieve “Invisibility Cloak” Breakthrough
**Chengdu, China** – Researchers at China’s University of Electronic Science and Technology have made a significant breakthrough in camouflage technology, developing a material that allows objects to blend seamlessly into their surroundings, achieving a form of “invisibility.” The findings, published in *Science Advances*, detail a self-adaptive photochromism (SAP) material that changes its molecular composition and color in response to ambient light.
The material, inspired by the natural camouflage of chameleons and octopuses, works by rearranging its molecules when exposed to specific wavelengths of light. This allows it to rapidly adapt its color to match the background. In tests, a solution of the SAP material changed color within 30 to 80 seconds to match both acrylic boxes and naturally colored environments. A white LED light source was used to trigger the color change.
Lead researcher Wang Dongsheng explained that this SAP technology offers a simpler and more efficient alternative to existing, complex electronic camouflage systems, which are often costly and less practical. While the current iteration hasn’t yet achieved the full spectrum of visible colors, the researchers aim to expand its capabilities in future work by adding more photochromic molecules and refining the material’s composition to improve color accuracy and speed of adaptation.
The team also demonstrated the potential for application as a spray-on coating by incorporating polycaprolactone, a biodegradable polyester. While a true “invisibility cloak” remains a future goal, this advancement marks a significant step toward practical, adaptable camouflage technology with potential applications in various fields.
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