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Mobile power plant on garbage

25.10.2007

A US university has created a mobile waste incineration plant for converting various types of waste into electricity.

It generates 90% more energy than it uses for its own work. Waste (various garbage, packaging, food waste) goes into business without sorting and turns into liquid fuel that runs on a diesel engine. The remaining ash has a volume 30 times smaller than the original garbage heap.

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New type of atomically thin carbon material discovered 07.06.2021

Researchers at the University of Marburg in Germany and Aalto University in Finland have discovered a new carbon network that is atomically thin like graphene but is made up of squares, hexagons and octagons that form an ordered lattice. The scientists also found that the electronic properties of the new carbon network are very different from those of graphene.

Unlike graphene and other forms of carbon, the biphenylene network, as the new material is called, has metallic properties. The narrow bands of the network, only 21 atoms wide, already behave like a metal, while graphene of this size is a semiconductor.

Scientists from Aalto University helped create an image of the material and decipher its properties. Prof. Peter Lilgeroth's team performed high-resolution microscopy, which showed the structure of the material, while researchers led by Prof. Adam Foster used computer modeling and analysis to understand the electrical properties of the material.

The new material is made by assembling carbon-containing molecules on an extremely smooth gold surface. These molecules first form chains that are made up of linked hexagons, and the subsequent reaction joins these chains together to form squares and octagons.

An important feature of chains is that they are chiral, that is, they exist in two types of mirror image, such as left hand and right hand. Chains of only one type are collected on the surface of gold, forming ordered assemblies before connecting. This is critical to the formation of a new carbon material because the reaction between two different types of chains results in only graphene.

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