Bottom-Up Construction with a 2D Twist Could Yield Novel Materials.
Jul 26 2022Reviewed by Alex Smith Rice University scientists have discovered that tetrahedron-shaped nanoparticles do something remarkable.
Tetrahedrons themselves do not appear to be chiral—that is, they could be superimposed on their mirror images. That made it twice as surprising that they fell in such a simple manner into chiral forms at the time of the experiments while being evaporated onto a surface, stated Jones. Self-assembly is known as a bottom-up method where a large structure, similar to a tree, grows from the linking of innumerable small pieces. Normally, bottom-up assembly is the quicker and more effective of the two methods.
Cheng added, “Initially we didn’t expect them to assemble at all. I just wanted to see that the particles were pure and uniform in size. When I saw the different chiral arrangements it was a total surprise to me that they assembled into such a cool structure!”
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