Low-Density 2D Superlattices Assembled via Directional DNA Bonding
Journal Article
·
· Angewandte Chemie (International Edition)
- Northwestern Univ., Evanston, IL (United States). International Institute for Nanotechnology; Northwestern Univ., Evanston, IL (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
It is critical to assemble nanoparticles (NPs) into superlattices with controlled symmetries and spacings on substrates for metamaterials applications, where such structural parameters dictate their properties. Here, we use DNA to assemble anisotropic NPs of three shapes-cubes, octahedra, and rhombic dodecahedra-on substrates and investigate their thermally induced reorganization into two-dimensional (2D) crystalline films. We report two new low-density 2D structures, including a honeycomb lattice based on octahedral NPs. The low-density lattices favored here are not usually seen when particles are crystallized via other bottom-up assembly techniques. Furthermore, we show that, consistent with the complementary contact model, a primary driving force for crystallization is the formation of directional, face-to-face DNA bonds between neighboring NPs and between NPs and the substrate. Finally, our results can be used to deliberately prepare crystalline NP films with novel morphologies.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- US Air Force Office of Scientific Research (AFOSR); USDOE; USDOE Office of Science (SC)
- Grant/Contract Number:
- AC02-06CH11357; SC0000989
- OSTI ID:
- 1864844
- Alternate ID(s):
- OSTI ID: 1810203
- Journal Information:
- Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Journal Issue: 35 Vol. 60; ISSN 1433-7851
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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