Carbon nanotube separation technology breakthrough in the full replacement of crystalline silicon took the first step

Imagine an electronic newspaper that you can roll up and smooth, even if the coffee is spilled on it, and the newspaper can still work to update the latest news in front of you.

Such a scenario could be achieved after a revolutionary breakthrough in CNT technology, which has been waiting for a long time due to a major bottleneck in technology. But now scientists have found a solution.

This technological innovation was proposed by researchers from McMaster University who have developed a completely new approach to purifying carbon nanotubes. Carbon nanotubes, the finest semiconducting material, are believed to be the miraculous material that is likely to replace silicon in the chip manufacturing industry.

"Once we get nanotubes of high purity in a reliable and cost-effective way, so many electronics are going to grow rapidly," said Alex Adronov, A professor of chemistry at McMaster University.

Carbon nanotubes are like hair, but their diameter is generally between one and a few tens of nanometers, and the length is much larger than their diameter. The team led by Professor Wei Fei at Tsinghua University has prepared the longest carbon nanotube in the world, with a single length of more than half a meter. Carbon nanotubes, as nanomaterials with a certain degree of flexibility and conductivity, have long been expected to reform silicon-based computers and electronic devices.

However, this material has always had a drawback that it is not possible to separate the metal-type carbon nanotubes from the semiconducting-type carbon nanotubes in the production process because both of them are generated at the same time in the production process, Carbon-based gas up to the nanotube clusters formed black mist.

In the final stages of carbon nanotube fabrication, semiconducting carbon nanotubes and metrosexual metals have me in them, and I have you in general mixed together. Although both carbon nanotubes are valuable, they must be used separately because only pure carbon nanotubes (either semiconducting or metallic) can be used at the device level, and effective separation techniques have become carbon nanotubes A technical difficulty to apply.

Global scientists have spent a great deal of time experimenting with various separation techniques. Although some researchers have developed a polymer reagent that can be mixed with semiconductor-type carbon nanotubes and washed together with a solvent, and then semiconductor-type carbon nanotubes are obtained by later-stage extraction, a method of extracting metal-type carbon nanotubes The current progress is slow.

Nowadays, Adronov's research group has witnessed this kind of method: they invert the electrical properties of the polymeric reagent capable of separating semiconducting carbon nanotubes, and can obtain new highs that separate only metallic carbon nanotubes Molecular reagents.

This achievement of the task force is also closely linked to the work of other laboratory colleagues. Both McMaster Technology and the Canadian Electron Microscopy Center have assigned experts and scholars to the task force and provided them with many experimental equipment.

In this regard, Adronov expressed his thanks and even said: "There is no place in the world to accomplish such a good interdisciplinary research."

So what's next? Adronov said it will make every effort to find the molecular reagent that can separate carbon nanotubes more efficiently and improve the process on a commercial scale.

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