期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 138, 期 44, 页码 14562-14565出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.6b09704
关键词
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资金
- Air Force Office of Scientific Research (AFOSR) Multidisciplinary University Research Initiative (MURI) [FA9550-11-1-0275]
- National Science Foundation Materials Research Science and Engineering Center program at the Materials Research Center of Northwestern University [DMR-1121262]
- NSF
- China Scholarship Council (CSC) [201306310060]
- NSERC [6799-459278-2014]
- MRSEC program at the Materials Research Center [NSF DMR-1121262]
- International Institute for Nanotechnology (IIN)
- State of Illinois, through the IIN
Colloidal crystallization can be programmed using building blocks consisting of a nano particle core and DNA bonds to form materials with controlled crystal symmetry, lattice parameters, stoichiometry, and dimensionality. Despite this diversity of colloidal crystal structures, only spherical nanoparticles crystallized with BCC symmetry experimentally yield single crystals with well-defined crystal habits. Here, we use low symmetry, anisotropic nanoparticles to overcome this limitation and to access single crystals with different equilibrium Wulff shapes: a cubic habit from cube-shaped nanoparticles, a rhombic dodecahedron habit from octahedron-shaped nanoparticles, and an octahedron habit from rhombic dodecahedron-shaped nanoparticles. The observation that one can control the microscopic shape of single crystals based upon control of particle building block and crystal symmetry has important fundamental and technological implications for this novel class of colloidal matter.
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