Tailored 3D Mechanical Metamaterials Made by Dip-in Direct-Laser-Writing Optical Lithography

1. Tiemo Bückmann^1,*, 
2. Nicolas Stenger¹,
3. Muamer Kadic¹, 
4. Johannes Kaschke¹,
5. Andreas Frölich¹, 
6. Tobias Kennerknecht²,
7. Christoph Eberl², 
8. Michael Thiel³, 
9. Martin Wegener¹

Article first published online: 12 APR 2012

DOI: 10.1002/adma.201200584

Dip-in direct-laser-writing (DLW) optical lithography allows fabricating complex three-dimensional microstructures without the height restrictions of regular DLW. Bow-tie elements assembled into mechanical metamaterials with positive/zero/negative Poisson's ratio and with sufficient overall size for direct mechanical characterization aim at demonstrating the new possibilities with respect to rationally designed effective materials.