For the first time, a scientific research team from the University of Nottingham in the UK captured atoms of the inert gas krypton (Kr) into carbon nanotubes one by one to form a one-dimensional gas.Researchers used advanced transmission electron microscopy to photographKr atoms are connected one after another in a "nano test tube" (a diameter of about 1/500,000 times the width of a human hair).This is a major advance in chemistry and physics, helping scientists better understand the behavior of atoms and molecules.
It is understood that in 1898, Ramsay and Travis of the United Kingdom discovered krypton when they used spectroscopic analysis to analyze the residual gas left after the liquid air evaporates oxygen, nitrogen, and argon. Its name comes from the Greek Kryptos, which means "hidden".
The element's spectrum shows bright green and orange colors and is considered a noble gas due to its low chemical reactivity.
The concentration of krypton in the Earth's atmosphere is about 1 ppm and can be obtained by fractionating liquid air. Krypton's most important use is in the manufacture of fluorescent lamps, along with other noble gases.
Krypton was historically widely considered to be chemically inert, but since the 1960s, some studies have identified a variety of krypton compounds, including krypton difluoride and a krypton-containing oxonate.