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According to the report of the British "Daily Mail" on July 28, a few days ago, scientists at the University of Cambridge in the United Kingdom stated that they have made a major breakthrough in the key technologies of invisible materials and achieved the latest results in the use of light to manufacture invisible materials. It's an important step in making an invisible cloak.
The results of this invisible material were published in the journal Nature, detailing the entire process of making nanoscale engineered materials into invisible materials. It is reported that the key technology in this research is to stitch a group of nano gold particles into a string, and the “needle†used is an unfocused laser. Subsequently, the strings of particles are connected together via a barrel-like molecule called a melon ring, so that the distance between the nanoparticles is controlled and fixed. Subsequently, the long strings of these particles are stacked one on top of the other, and when a large number of particles are stacked, the path of light through the particles can be changed by a special casting method. With this metamaterial, light can be reflected to the "wrong" path. At this time, the object either disappears or it appears to be another object, thus achieving an invisible effect.
It is understood that the melon ring is like a molecular handcuff, and can lock other molecules together. In this study, the role of melons is like filling gaps between tiles. Therefore, all nanogold particles can be fixed at the same pitch, and then they are stitched and stacked.
Ventsislav Valev, a professor at the University of Cambridge's Cavendish Laboratory and the researcher of the project, frankly stated: “The main content of our research is to find a way to control the distance between nanoparticles. Connect several nanoparticles together There is no problem, but it is difficult to connect many particles into a long string. This method we used cannot be realized before and it has a wide range of potential applications."
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