期刊
NATURE
卷 491, 期 7422, 页码 51-U61出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/nature11564
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资金
- MRSEC Program of the National Science Foundation [DMR-0820341]
- National Science Foundation [ChE-0911460]
- MRI programme of the National Science Foundation [DMR-0923251]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [0911460] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0923251] Funding Source: National Science Foundation
The ability to design and assemble three-dimensional structures from colloidal particles is limited by the absence of specific directional bonds. As a result, complex or low-coordination structures, common in atomic and molecular systems, are rare in the colloidal domain. Here we demonstrate a general method for creating the colloidal analogues of atoms with valence: colloidal particles with chemically distinct surface patches that imitate hybridized atomic orbitals, including sp, sp(2), sp(3), sp(3)d, sp(3)d(2) and sp(3)d(3). Functionalized with DNA with single-stranded sticky ends, patches on different particles can form highly directional bonds through programmable, specific and reversible DNA hybridization. These features allow the particles to self-assemble into 'colloidal molecules' with triangular, tetrahedral and other bonding symmetries, and should also give access to a rich variety of new microstructured colloidal materials.
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