The New Structure Of Graphene Is Like A Sponge
According to the British "Independent" reported on the 8th, the United States Massachusetts Institute of Technology (MIT) scientists by pressing and melting graphene sheet, to create one of the lightest and most solid material - a porous three-dimensional graphene structure, Its shape is similar to sponge, the density is only 5% of iron, but the strength of iron more than 10 times.
Graphene is considered to be the most sturdy material in the two-dimensional form, but it has been difficult for researchers to convert the strong strength of its two-dimensional form into useful three-dimensional materials. In the latest study, the research team pressed the small pieces of graphene together by applying heat and pressure to create a complex and stable structure similar to corals and diatom organisms. The new structure is called "spiral twenty-four tetrahedron", its surface area is very large relative to the volume, but very strong.
"The two-dimensional material of graphene is only one atom thick, has a unique degree of ruggedness and electrical properties, but because it is too slim, it is," said Marcus Bieer, director of research team and director of MIT Civil Engineering and Environmental Engineering. It 's hard to make three - dimensional materials, but our latest research has done that.
"The geometrical shape of the graphene naturally occurring under the action of heat and pressure is very complex and can not be made in the traditional way." In the experiment, the researchers used a 3D printer to create a structure that expanded thousands of times, And tested the results obtained.
The new study, published recently in the journal Science Progress, shows that the superiority of the new structure is due to this unique structure rather than the material itself. This means that scientists can make other materials made of the same geometry to obtain the same strength of light materials.
The researchers believe that the same geometry can even be applied to larger blocks of structural materials. For example, the cement that makes the bridge can make the same porous geometry and achieve the same level of strength while reducing the weight. In addition, since this shape is filled with tiny pores, it is expected to be used to filter water or chemicals.