Preparation of three-dimensional nano-materials by highly controlled "cutting-edge technology"

In the storm, I will wait for you here ~

Massachusetts Institute of Technology (MIT) proposed a method of directly assembling three-dimensional structures with metal, semiconductor and biological nano-materials.

The manufacturing technology of two-dimensional nano-materials is to deposit materials on the substrate plane according to the design pattern. Similarly, the manufacturing technology of three-dimensional nano-materials is to deposit materials in a three-dimensional scaffold according to the designed structure. However, it is difficult to realize such a three-dimensional scaffold at the same time by satisfying the requirements of porosity to accommodate the placed material through the solvent and compactness of the material, and shrinking and drying in a controlled manner. Therefore, researchers used the two-photon excitation reaction between fluorescein in acrylate hydrogel and hydrogel to attach fluorescein molecules carrying reaction groups to the expanded gel according to a set pattern under the supervision of two-photon microscope, then removed the fluorescein solution, functionalized the deposited gel with materials capable of conjugate reaction, and finally shrunk the gel and scaffold to 65,438+0/20 ~ 65,438 in various dimensions with acid or divalent cations.

Preparation of three-dimensional nano-materials

Gel can contain various hydrophilic reagents, such as small molecules, biomolecules, semiconductor nanoparticles and metal nanoparticles. By controlling the power of excitation photons, the density of deposited materials can be adjusted.

Using this method, various nano three-dimensional structural materials can be created, which has a wide application prospect in various fields such as optics, medicine, nano-electronic equipment or robots.

(Blue Starfish)

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