期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 60, 期 35, 页码 19035-19040出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202105796
关键词
colloidal crystals; DNA; nanoparticle superlattice; nanoparticles; small-angle X-ray scattering
资金
- Air Force Office of Scientific Research [FA9550-17-1-0348, FA9550-16-1-0150]
- Center for Bio-Inspired Energy Science, an Energy Frontier Research Center - U.S. Department of Energy, Office of Science, Basic Energy Sciences [DE-SC0000989]
- Air Force Research Laboratory [FA8650-152-5518]
- DOE Office of Science by Argonne National Laboratory [DE-AC02-06CH11357]
- Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF) [ECCS-1542205]
- MRSEC program at the Materials Research Center [NSFDMR-1121262]
- International Institute for Nanotechnology (IIN)
- State of Illinois, through the IIN
- Sherman Fairchild Foundation, Inc
The study focuses on assembling nanoparticles of different shapes using DNA on substrates and investigating their reorganization into two-dimensional crystalline films under thermal conditions. Two new low-density 2D structures were reported, including a honeycomb lattice based on octahedral nanoparticles.
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. Our results can be used to deliberately prepare crystalline NP films with novel morphologies.
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