Journal
NANO LETTERS
Volume 15, Issue 8, Pages 5235-5239Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b01499
Keywords
Protein design; self-assembly; 2-D materials; bionanotechnology; artificial S-layers
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Funding
- NSF [BBBE 1401835]
- DOE BES [DE-SC0005153]
- NIH [T32CA138312]
- DTRA
- AFOSR
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1401835] Funding Source: National Science Foundation
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We have combined fusion of oligomers with cyclic symmetry and alanine substitutions to eliminate clashes and produce proteins that self-assemble into 2-D arrays upon addition of calcium ions. Using TEM, AFM, small-angle X-ray scattering, and fluorescence microscopy, we show that the designed lattices which are 5 nm high with p3 space group symmetry and 7.25 nm periodicity self-assemble into structures that can exceed 100 mu m in characteristic length. The versatile strategy, experimental approach, and hexagonal arrays described herein should prove valuable for the engineering of functional nanostructured materials in 2-D.
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