Position‐ and Orientation‐Controlled Growth of Wulff‐Shaped Colloidal Crystals Engineered with DNA
Abstract
Colloidal crystals have emerged as promising candidates for building optical microdevices. Techniques now exist for synthesizing them with control over their nanoscale features (e.g., particle compositions, sizes, shapes, and lattice parameters and symmetry); however, the ability to tune macroscale structural features, such as the relative positions of crystals to one another and lattice orientations, has yet to be realized. Here, inspiration is drawn from epitaxial growth strategies in atomic crystallization, and patterned substrates are prepared that, when used in conjunction with DNA‐mediated nanoparticle crystallization, allow for control over individual Wulff‐shaped crystal growth, location, and orientation. In addition, the approach allows exquisite control over the patterned substrate/crystal lattice mismatch, something not yet realized for any epitaxy process. This level of structural control is a significant step toward realizing complex, integrated devices with colloidal crystal components, and this approach provides a model system for further exploration in epitaxy systems.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 21, 2020
- Source ID
- 10.1002/adma.202005316
Entities
People
- Chad Mirkin
- Haixin Lin
- Jingshan S. Du
- Lin Sun
- Wenjie Zhou
- Yuanwei Li
Organizations
- Air Force Office of Scientific Research
- Northwestern University
- Office of Basic Energy Sciences
- Office of Science
- Sherman Fairchild Foundation
- United States Department of Energy