Fluidic Flow Assisted Deterministic Folding of Van der Waals Materials
Abstract
Origami offers a distinct approach for designing and engineering new material structures and properties. The folding and stacking of atomically thin van der Waals (vdW) materials, for example, can lead to intriguing new physical properties including bandgap tuning, Van Hove singularity, and superconductivity. On the other hand, achieving well‐controlled folding of vdW materials with high spatial precision has been extremely challenging and difficult to scale toward large areas. Here, a deterministic technique is reported to fold vdW materials at a defined position and direction using microfluidic forces. Electron beam lithography (EBL) is utilized to define the folding area, which allows precise control of the folding geometry, direction, and position beyond 100 nm resolution. Using this technique, single‐atomic‐layer vdW materials or their heterostructures can be folded without the need for any external supporting layers in the final folded structure. In addition, arrays of patterns can be folded across a large area using this technique and electronic devices that can reconfigure device functionalities through folding are also demonstrated. Such scalable formation of folded vdW material structures with high precision can lead to the creation of new atomic‐scale materials and superlattices as well as opening the door to realizing foldable and reconfigurable electronics.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 14, 2020
- Source ID
- 10.1002/adfm.201908691
Entities
People
- Aiichiro Nakano
- Beibei Wang
- Fanxin Liu
- Han Wang
- Haozhe Wang
- Huan Zhao
- Jing Kong
- Mark J. Stevens
- Priya Vashishta
- Rajiv Kalia
- Wei Sun Leong
- Xiaodong Yan
Organizations
- Air Force Office of Scientific Research
- Massachusetts Institute of Technology
- National Nuclear Security Administration
- Office of Basic Energy Sciences
- Office of Science
- Sandia National Laboratories
- United States Department of Energy
- University of Southern California
- Zhejiang University of Technology