We have succeeded in developing a simple synthesis path for the basic building block of silicon-germanium alloys. However, the production of such alloys is very difficult and you often get mixtures of different compositions. Benedikt Köstler, who is developing the compounds as part of his doctoral thesis, says: "Recent studies have shown that silicon-germanium alloys are superior to pure silicon semiconductors in important application areas. The silicon-germanium adamantane represents the building block of a mixed silicon-germanium alloy.
The hydrogen atoms can easily be replaced with functional groups, thus giving the silafullerane different properties." Bonn quantum chemist Markus Bursch adds: "We support the targeted generation of potentially useful properties with theoretical predictions of their resulting effects." Doctoral student Marcel Bamberg, who synthesised the molecule, explains: "Our silafullerane is the long-sought progenitor of this new class of substances. A hydrogen atom protrudes outward at each silicon corner of the body. The 20 silicon atoms of silafullerane form a dodecahedron, a body composed of regular pentagons. Decisive insights into the electronic structures of the new compounds were provided by computer-based theoretical analyses from Stefan Grimme's research group in Bonn. The second new class of materials are crystal building blocks made of 10 silicon and germanium atoms that have a diamond-like structure. New substance classes for nanomaterials: Nano spheres and diamond slivers made of silicon and germanium: Potential applications as nano semiconductor materialsįrankfurt, Germany | Posted on September 10th, 2021Ī team at Goethe University Frankfurt led by Matthias Wagner has now succeeded in synthesising molecular nano "spheres" made of 20 silicon atoms, so-called silafulleranes. Such nano semiconductors also play a central role in converting electricity into light and vice versa.
Since the etching processes traditionally used in chip production are increasingly reaching their limits, the development of new, nanostructured semiconductor materials is essential. The latest generations of computer chips are only a few nanometres in size and are becoming ever more energy-saving and powerful as a result of progressive miniaturisation. Blue: silicon, green: chloride ion, grey: hydrogen. The silicon sphere synthesised for the first time by chemists from Goethe University Frankfurt, promises new applications in semiconductor technology. Home > Press > New substance classes for nanomaterials: Nano spheres and diamond slivers made of silicon and germanium: Potential applications as nano semiconductor materials
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