Graphene is the thinnest carbon material, with atoms arranged in a honeycomb shape, with excellent mechanical, electrical and thermal properties. Graphene has a wide range of academic and industrial applications, and it has many advantages in ultra-high-speed electronics, flexible transparent conductive films, solar cells, separation membranes, and transmission electron microscopy (TEM) imaging. Since graphene was first prepared in 2004, it has opened up a wave of research on two-dimensional materials. Chemical vapor deposition (CVD) has emerged as the most promising technique for the synthesis of graphene due to its ability to provide high-quality, large-area production with controllable layer number and good reproducibility.

In order to characterize and apply graphene, it needs to be transferred from the growth substrate to the target substrate. Since graphene is only one atom thick, a support layer is required during the transfer process to prevent cracks from appearing and propagating in the graphene film. So far, after ten years of research, the most widely used graphene transfer support layer is still polymethyl methacrylate (pmma). However, there are two main problems in the pmma-assisted transfer process: (1) wrinkling; (2) transfer of supporting layer residues; these problems have a large impact on the performance of graphene. In order to overcome these two problems, Hefei Vigon Materials Technology has developed a graphene that can be quickly self-transferred through many experiments. Let's take a look at the introduction of fast self-transfer graphene:

The fast self-transfer graphene is based on the soaked graphene, and the copper substrate is etched to obtain the graphene/protective layer film, and then the graphene/protective layer film is transferred to the "suspended substrate". In this case Next, use the product simply by gently releasing it in deionized water to obtain a graphene/protective layer film that can be transferred directly to any substrate. After the graphene/protective layer film (the protective layer is generally selected from PMMA) is transferred to the target substrate, the protective layer (PMMA) can be removed by drying at low temperature and soaking in acetone. It is very convenient to use and can save a lot of energy for graphene researchers.

How to quickly transfer graphene by yourself: take a dropper with pure water or deionized water, infiltrate the dust-free cloth substrate next to the graphene, and then slowly release it into the water, it will naturally float on the water surface. Rapid self-transfer Graphene is released into deionized water and then transferred to other substrates. Is the combination of graphene and substrate very strong: After the graphene is transferred to other substrates, the moisture is dried, and there is no air between the graphene and the substrate. It is very strong, and the binding force is mainly intermolecular force.

How to store fast self-service graphene: For long-term storage, it must be stored in the fresh-keeping layer of the refrigerator to keep the packaging environment moist, or released into deionized water for sealed storage. It is best to use the product as soon as possible (about two weeks) after getting the product. After the packaging environment is dry, it is not conducive to the release and use of graphene. The water mist in the packaging bag is a normal phenomenon, which is generated by deionized water absorbed by the white dust-free cloth. The purpose is to maintain the humidity of the packaging environment and facilitate the user to remove the graphene from the substrate.

Can the fast self-transfer graphene be cut again: if it can be cut, after the fast self-transfer graphene is released in deionized water, it is transferred to the filter membrane for cutting, and then released into deionized water again after cutting, and then transferred to the target substrate on.

Will the graphene transfer to the substrate fall off in a high temperature environment? Graphene will not fall off in a high temperature environment.