Chinese and English scholars prepare graphene "minimum channel"

The reporter learned from the University of Science and Technology of China that the material mechanics research team of the school cooperated with the Nobel Prize winner in physics and Professor Andrei Heim of the University of Manchester in the United Kingdom. The recent experiment produced the smallest size of graphene channel, which can significantly enhance the nanometer. The transport efficiency of water at scale provides a technical basis for designing new nanofluidic devices for desalination, gas separation, and human bionics.

Graphene is a two-dimensional crystal composed of carbon atoms with only one atomic thickness. It is not only the thinnest material, but also has a very smooth surface. Using this feature of graphene, the researchers proposed a new method for constructing nanochannels, stacking graphenes of different sizes to form capillary channels of nanometer size. The ultra-small capillary channel has a dimensional adjustment accuracy of 0.34 nm and is the smallest size nanochannel that can be fabricated in the laboratory to date.

It is understood that the transport of matter at the nanoscale is one of the focuses of theoretical and experimental research today. The research team of the Key Laboratory of Mechanical Behavior and Design of Materials Science and Technology of China University of Science and Technology used theoretical analysis and molecular simulation methods to study the water transport mechanism in nanochannels. It was found that the solid-liquid interface at the molecular scale will increase the driving force of water transport, thus greatly improving Water transport efficiency.

Recently, the internationally authoritative academic journal Nature has published the results. Wang Fengchao, the co-author of the paper and the associate researcher of the Chinese Academy of Sciences, said that the research not only has a significant impact on the understanding and understanding of the fluid transport mechanism at the nanoscale, but also has important reference significance for the design and development of new nanofluidic devices. Expand the application of two-dimensional materials such as graphene in seawater desalination and gas separation.

"There are many nano-sized channels in human life. If you can develop biomimetic devices, it will have great medical significance. This is one of our current research directions." Wang Fengchao said.

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