Clathrate colloidal crystals

DNA-programmable assembly has been used to deliberately synthesize hundreds of different colloidal crystals spanning dozens of symmetries, but the complexity of the achieved structures has so far been limited to small unit cells. We assembled DNA-modified triangular bipyramids (~250-nanometer long e...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 2017-03, Vol.355 (6328), p.931-935
Main Authors: Lin, Haixin, Lee, Sangmin, Sun, Lin, Spellings, Matthew, Engel, Michael, Glotzer, Sharon C., Mirkin, Chad A.
Format: Article
Language:English
Subjects:
Architecture
Assembly
catalysis (homogeneous), solar (photovoltaic), bio-inspired, charge transport, mesostructured materials, materials and chemistry by design, synthesis (novel materials), synthesis (self-assembly)
Clathrates
Colloids
Complexity
Crystal structure
Crystallization
Crystals
Deoxyribonucleic acid
DNA
DNA - chemistry
Electron microscopy
Gold
Microscopy, Electron
Models, Chemical
Molecular structure
Nanoparticles
Nanoparticles - chemistry
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Summary:DNA-programmable assembly has been used to deliberately synthesize hundreds of different colloidal crystals spanning dozens of symmetries, but the complexity of the achieved structures has so far been limited to small unit cells. We assembled DNA-modified triangular bipyramids (~250-nanometer long edge, 177-nanometer short edge) into clathrate architectures. Electron microscopy images revealed that at least three different structures form as large single-domain architectures or as multidomain materials. Ordered assemblies, isostructural to clathrates, were identified with the help of molecular simulations and geometric analysis. These structures are the most sophisticated architectures made via programmable assembly, and their formation can be understood based on the shape of the nanoparticle building blocks and mode of DNA functionalization.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.aal3919