期刊
NATURE MATERIALS
卷 9, 期 11, 页码 913-917出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NMAT2870
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资金
- NSF-NSEC
- AFOSR
- DOE Office through the NU Nonequilibrium Energy Research Center [DE-SC0000989]
- DoD
- Northwestern University
- NSF
- NDSEG
- E.I. DuPont de Nemours Co.
- Dow Chemical Company
- State of Illinois
- US Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- NU Office for Research
Directional bonding interactions in solid-state atomic lattices dictate the unique symmetries of atomic crystals, resulting in a diverse and complex assortment of three-dimensional structures that exhibit a wide variety of material properties. Methods to create analogous nanoparticle superlattices are beginning to be realized(1-5), but the concept of anisotropy is still largely underdeveloped in most particle assembly schemes(6). Some examples provide interesting methods to take advantage of anisotropic effects(7-11), but most are able to make only small clusters or lattices that are limited in crystallinity and especially in lattice parameter programmability(12-17). Anisotropic nanoparticles can be used to impart directional bonding interactions on the nanoscale(6,18), both through face-selective functionalization of the particle with recognition elements to introduce the concept of valency(19-21), and through anisotropic interactions resulting from particle shape(13,22). In this work, we examine the concept of inherent shape-directed crystallization in the context of DNA-mediated nanoparticle assembly. Importantly, we show how the anisotropy of these particles can be used to synthesize one-, two-and three-dimensional structures that cannot be made through the assembly of spherical particles.
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