The new method produces wires with only three atoms in diameter

Researchers at Stanford University and the Department of Energy’s SLAC National Accelerator Laboratory have developed a new method of making diamonds with diameters of only three atoms in diameter using diamond-based hydrocarbons. This technology has a wide range of uses in the preparation of new types of power generation fibers, optoelectronic devices, and the like. The relevant research was published in the UK's "Nature·Material" magazine on the 26th.

Diamond-carbon is a cage-like hydrocarbon compound with a carbon skeleton that resembles a diamond lattice structure. It has great application value in medicine, chemistry, polymers, and nanotechnology. In this study, the researchers used adamantane as an assembly tool to connect the chalcogenide formed by the binding of adamantane with a sulfur atom and a copper ion to form a basic component for the manufacture of nanowires, and then it was placed in a configuration. The solution. These components will be attracted to each other by van der Waals's gravity, self-assembled little by little like Lego bricks, and “grow” into a linear structure in which the chalcogenide is in the middle and the diamondoid is wrapped out. The structure has good electrical conductivity, the middle chalcogenide acts as a conductive wire core, and the diamondoid can serve as an insulating layer.

The researchers said that there are many existing self-assembly techniques, but they can assemble solid-state nuclei into nanowires with good conductivity. Their new method is still the first. Diamond is a good preparation tool. The research team has made one-dimensional cadmium-based, zinc-based, iron-based, and silver-based nanowires using adamantane. The longest nanowires can be seen without a microscope. .

The researchers pointed out that if a material is very tiny, it is only a one-dimensional or two-dimensional structure, and it will have very different characteristics compared to a large-volume three-dimensional structure. The "Lego-style" assembly method they developed allowed scientists to assemble materials with atomic precision and create new materials with unique electronic and physical properties, which have great potential for application. (Reporter Liu Haiying)

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