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The fragrance of chocolate gives people infinite aftertaste; When color and fragrance come together, it seems to open the door to a new world. Recently, scientists at the Federal Institute of Technology in Zurich, Switzerland, made a cool chocolate using nanotechnology. Its surface naturally emits rainbow colors, everyone who sees it, can not help but sigh: "Is this the taste of the rainbow?" "
tiny grooves make chocolate "rainbow".
to make colorful colors on sweet foods like chocolate, it's not just a matter of imagination. If placed under a microscope, you will see that there are many tiny grooves on the chocolate surface.
This is the legendary structural color, do not rely on pigments or other additives, only microstructage of light diffraction and scattering, you can show brilliant colors, and the usual "pigment color" is very different. Such chocolate, like a color changer, uses changes in skin structure to scatter light at specific wavelengths, constantly changing the color of the body, a skill that pigment cells alone do not have. Common in nature, with structural colors are shells, butterfly wings and so on.
To make the rainbow chocolate, one product developer speculated that the researchers should have created a nanotechnology chocolate mold that used electron beam lithation to etch lines about 100 nanometers wide on a glass or silicon mold, and then placed the chocolate liquid in the mold to cool it down and solidify it.
this structural color is not the first time it has appeared on food, and it is sometimes seen on cooked beef. Research shows that the "rainbow" on beef is the microstructure of muscle fibers, is a structural color, and has nothing to do with safety.
researchers hope to extend the coloring technology to the mass market. At present, the production of structural colors is not complicated.
coloring chocolate is just the beginning.
chocolate is just the beginning of nanocoloring. A Japanese company has created a fabric named after a butterfly using a structural color method and made a dress that will see different colors from different angles. Last year, researchers at Kyoto University in Japan also modeled a high-definition painting of Canagawa Surfing without using any ink or pigment by altering the microstructur of the paper. This particular painting measures only 1 mm in size, has a pattern resolution three times that of traditional inkjet printing, and never fades.
's an environmentally friendly and long-lasting coloring scheme for food, fabric, art, it's perfect. But scientists also want to use structural colors in more "hard-core" areas, such as chips. Because the application of structural color is essentially through microstructur design, to achieve the regulation of photons. At present, all kinds of semiconductor devices in integrated circuit chip are based on the regulation of electronics to realize logical operation and information transmission. So, with the capability of electronic-based information-based semiconductor devices to the limit, can photon regulation be used to enable the next generation of photon computing chips with smaller, lower power consumption and greater computing power? The research related to photonic crystals, quantum computing, etc. is already on the way, let's wait and see.
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