Invisibility thanks to silver-coated molecules

Some scientists say that silver nanoparticles suspended in water create a flexible and flexible material - the main ingredient for making an invisible object.

Ji-Ping Huan from Fudan University (China) and colleagues recently proposed a 10-nanometer-thick iron ore liquid, coated with a 5-nanometer-thick silver.

When there is no magnetic field, silver nanoparticles will float on the surface of the water, but when the magnetic field is present, the molecules will collide themselves into strings of varying lengths depending on the magnetic field. These strings can attract each other to form thicker columns. These columns will be in the direction of the magnetic field: if they are oriented vertically in the water, the light that shines on the water surface will be bent.

Hide behind the water. Photo: AFP

This attribute can be used to create stealth devices: to make light surrounding an object (not touching the object to reflect the image of the object in the human eye) making it invisible. In addition, it can be applied to the lens to capture better detail than any microscope.

Huang said that the liquid could theoretically reverse all wavelengths in the visible spectrum, provided that the nanoparticles were properly coated.