Kirigami Engineering—Nanoscale Structures Exhibiting a Range of Controllable 3D Configurations
Abstract
Kirigami structures provide a promising approach to transform flat films into 3D complex structures that are difficult to achieve by conventional fabrication approaches. By designing the cutting geometry, it is shown that distinct buckling‐induced out‐of‐plane configurations can be obtained, separated by a sharp transition characterized by a critical geometric dimension of the structures. In situ electron microscopy experiments reveal the effect of the ratio between the in‐plane cut size and film thickness on out‐of‐plane configurations. Moreover, geometrically nonlinear finite element analyses (FEA) accurately predict the out‐of‐plane modes measured experimentally, their transition as a function of cut geometry, and provide the stress–strain response of the kirigami structures. The combined computational–experimental approach and results reported here represent a step forward in the characterization of thin films experiencing buckling‐induced out‐of‐plane shape transformations and provide a path to control 3D configurations of micro‐ and nanoscale buckling‐induced kirigami structures. The out‐of‐plane configurations promise great utility in the creation of micro‐ and nanoscale systems that can harness such structural behavior, such as optical scanning micromirrors, novel actuators, and nanorobotics. This work is of particular significance as the kirigami dimensions approach the sub‐micrometer scale which is challenging to achieve with conventional micro‐electromechanical system technologies.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 22, 2020
- Source ID
- 10.1002/adma.202005275
Entities
People
- Daniel Lopez
- Haogang Cai
- Horacio D Espinosa
- Lior Medina
- Vladimir A. Aksyuk
- Xu Zhang
Organizations
- Air Force Office of Scientific Research
- Army Research Office
- Carnegie Mellon University
- National Institute of Standards and Technology
- National Science Foundation
- New York University
- Northwestern University
- Office of Science
- Pennsylvania State University
- United States Department of Energy