Lightweight, flaw-tolerant, and ultrastrong nanoarchitected carbon
Abstract
A long-standing challenge in modern materials manufacturing and design has been to create porous materials that are simultaneously lightweight, strong, stiff, and flaw-tolerant. Here, we fabricated pyrolytic carbon nanolattices with designable topologies by a two-step procedure: direct laser writing and pyrolysis at high temperature. The smallest characteristic size of the nanolattices approached the resolution limits of the available 3D lithography technologies. Due to the designable unit-cell geometries, reduced feature sizes, and high quality of pyrolytic carbon, the created nanoarchitected carbon structures are lightweight, can be made virtually insensitive to fabrication-induced defects, attain nearly theoretical strength of the constituent material, and achieve specific strength up to one to three orders of magnitude above that of all existing micro/nanoarchitected materials.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 18, 2019
- Source ID
- 10.1073/pnas.1817309116
Entities
People
- Andrey Vyatskikh
- Huajian Gao
- Julia R. Greer
- Xiaoyan Li
- Xuan Zhang
Organizations
- Brown University
- California Institute of Technology
- Ministry of Science and Technology of the People's Republic of China
- National Natural Science Foundation of China
- National Science Foundation
- Tsinghua University
- United States Department of Defense
- Zhejiang University