Origami lattices from flat sheets and patterning yield metamaterials with exotic functions
- PDF / 699,293 Bytes
- 1 Pages / 585 x 783 pts Page_size
- 70 Downloads / 146 Views
d. The second category has more complex unit cells, requiring the lattice to be sliced along the tops and bottoms of rows. The last category builds on the second one, by requiring spatial rotations nspired by the Japanese paper-foldduring the folding process. ing art of origami, researchers have As a demonstration, the researchers devised techniques to create complex hinged together 3D printed aluminum three-dimensional (3D) lattices from prepanels using metal pins and prestretched designed flat materials. Unlike 3D printrubber bands. The piece self-folds into ing—one route for creating lattice struca cubic lattice, the team reported in tures—the origami method could enable a recent issue of Science Advances scientists to add functional features and (doi:10.1126/sciadv.aao1595). To demcreate materials with novel properties. onstrate the technique’s usefulness for Lattice-like highly porous 3D strucadding features to the insides of lattices, tures made of metals, polymers, and they used electron beam deposition to carbon have recently opened up a slew make tiny 3D structures a few tens of of novel applications. They can be used nanometers in size on the origami sheets, to make ultra-strong, ultralight car and so that these became situated on the inaircraft parts; for energy storage; as tisside of the folded lattices. They could sue-generating scaffolds in regenerative pack multiple types of surface patterns medicine; and for metamaterials. into the same origami lattice. Advanced 3D printing is used to make “We have demonstrated that we lattice-like metamaterials. But it does not have a folding strategy,” Zadpoor says. allow easy access to the inner surfaces “Now we want to be able to do this at of the structures. Accessing the inner the microscale.” surfaces is critical for creating nanopat The advantage of this new approach terns that can stimulate tissue growth or for creating complex 3D structures is that it decouples structure and function, says Jesse Silverberg, a researcher at Harvard University’s Wyss Institute of Biologically Inspired Engineering. “Most of the earlier work on origaRegular mi-inspired materials shows 3D configuration that structure is function,” he says. “Here, functionality can be arbitrarily prescribed on the 2D surface before the Initially flat structure structure folds. Once folded, the functionality is now embedded in the 3D structure.” Prachi Patel The self-folding sequences for a rhombic dodecahedron origami lattice. Credit: Science Advances. Origami lattices from flat sheets and patterning yield metamaterials with exotic functions
I
Join in the conversation and share your 2018 MRS Spring Meeting stories, photos and updates!
2018
Follow #S18MRS on Twitter, Facebook and NOW on Instagram @materials_mrs.
SPRING MEETING & EXHIBIT
April 2 – 6, 2018 | Phoenix, Arizona
166
• VOLUME 43 • MARCH 2018 • www.mrs.org/bulletin Downloaded MRS fromBULLETIN https://www.cambridge.org/core. IP address: 80.82.77.83, on 26 Apr 2018 at 11:22:58, subject to the Cambridge Core terms of use, available at
Data Loading...
