Planar graphene can self-fold into a 3D structure
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Graphene self-folds into a flower-like structure.
According to the report of the Physicist Organization Network on the 9th, scientists from the Johns Hopkins University and the Massachusetts Institute of Technology have cooperated to use a new method to self-fold plane graphene into 3D geometry. This result, published in the latest issue of "Scientific Progress," will bring a broader perspective to the development of wearable electronic devices, living cell capsules, and folded transistors with graphene.
As a new type of nanomaterial, graphene is often reported in news reports for 10 years due to its characteristics of ultrathinness, high strength, and strong electrical and thermal conductivity. It brings a whole series of new applications in the field of biosensors and wearable electronic devices. However, these application devices require planar graphene to be made into a three-dimensional structure. Existing methods mainly use etching technology to make the graphene layer form a desired shape on a certain substrate, and many shapes cannot be obtained, so researchers have been looking for better Methods.
In this new study, led by Johns Hopkins University student Xu Weinan, the researchers developed a new micrographic processing technology. The graphene layer can be set along the heating process. The lines are curved and folded into a 3D structure like an artificial origami. This new method has two major advantages. First, it can avoid the loss of graphene characteristics that occurred in previous processes. The folding process can completely retain the conductive and thermal properties of graphene. Second, the creases in the 3D shape can form energy. The bandgap further increases the electrical conductivity of the graphene.
According to the researchers, the new technology can also be compatible with traditional lithography and applied to wafers, and can be processed in parallel with high levels without impediments to large-scale production. In this test, they used this folding technology to create a 3D structure that can enclose living cells, a non-linear resistor, and a transistor device. 3D graphene will bring people a variety of very easy-to-use wearable electronic devices. Living body sensors. (Reporter Nie Cuirong)
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