Device-quality, reconfigurable metamaterials from shape-directed nanocrystal assembly
Abstract
Colloidal nanocrystals with defined sizes and shapes are ideal building blocks for nanofabrication. However, the ability to arbitrarily arrange them on surfaces with control over their orientation remains elusive. Here we report a shallow-template-assisted DNA-mediated assembly strategy to precisely arrange colloidal nanocrystals on surfaces, with single-particle control across submillimeter areas. In addition, the oligonucleotide bonds between the nanocrystals and substrate can be reversibly expanded and contracted enabling postsynthetic tunability of the assembled structures. Using this approach, we synthesized a nanocrystal-based, dynamically tunable metasurface (an anomalous reflector), thereby illustrating the potential for unique device construction via DNA programmable assembly.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 17, 2020
- Source ID
- 10.1073/pnas.2006797117
Entities
People
- Chad Mirkin
- Devleena Samanta
- Haixin Lin
- Koray Aydın
- Qing-Yuan Lin
- Wenjie Zhou
- Ziyin N. Huang
- Zizhuo Liu
Organizations
- Air Force Office of Scientific Research
- National Institute of General Medical Sciences
- National Science Foundation
- Northwestern University
- Office of Naval Research
- United States Department of Energy