Journal
NATURE NANOTECHNOLOGY
Volume 6, Issue 9, Pages 580-587Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NNANO.2011.121
Keywords
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Funding
- Chinese Academy of Sciences
- National Natural Science Foundation for Distinguished Youth Scholars of China [21025310]
- National Research Fund for Fundamental Key Project [2009CB930401]
- National Natural Science Foundation of China [91027011, 20973047]
- US Army Research Office [W911NF-10-1-0518]
- James S. McDonnell Foundation [220020139]
- Department of Defense, Office of the Director, Defense Research and Engineering (DOD/DDRE) [N00244-09-1-0062]
- US DOE [DE-AC02-06CH11357]
- US DOE, Office of Science, Basic Energy Sciences [DE-SC0000957]
- National Science Foundation [ECS-0601345, EFRI-BSBA 0938019, CBET 0933384, CBET 0932823]
- NIH [1R21CA121841-01A2]
- NSF [DMR-9871177]
- Vietnam Education Foundation
- Office of Science, Office of Basic Energy Sciences, of the US DOE [DE-AC02-06CH-11357]
- Argonne National Laboratory
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Nanoparticles are known to self-assemble into larger structures through growth processes that typically occur continuously and depend on the uniformity of the individual nanoparticles. Here, we show that inorganic nanoparticles with non-uniform size distributions can spontaneously assemble into uniformly sized supraparticles with core-shell morphologies. This self-limiting growth process is governed by a balance between electrostatic repulsion and van der Waals attraction, which is aided by the broad polydispersity of the nanoparticles. The generic nature of the interactions creates flexibility in the composition, size and shape of the constituent nanoparticles, and leads to a large family of self-assembled structures, including hierarchically organized colloidal crystals.
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