Peptide Nanotube Nematic Phase
| Autor: | Seyda Bucak, Malin Zackrisson, Ulf Olsson, Irem Nasir, Celen Cenker |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Nanotube
Materials science Surface Properties Dispersity Peptide Microscopy Electron Transmission Liquid crystal Phase (matter) Electrochemistry Scattering Radiation Trifluoroacetic Acid General Materials Science Spectroscopy chemistry.chemical_classification Microscopy Models Statistical Nanotubes Small-angle X-ray scattering X-Rays Cryoelectron Microscopy Water Surfaces and Interfaces Condensed Matter Physics Crystallography chemistry Transmission electron microscopy Salts Self-assembly Peptides |
| Zdroj: | Langmuir. 25:4262-4265 |
| ISSN: | 1520-5827 0743-7463 |
| DOI: | 10.1021/la804175h |
| Popis: | The self-assembly of the trifluoroacetate salt of the short peptide (ala)6-lys (A6K) in water has been investigated by cryo-transmission electron microscopy and small-angle X-ray scattering. For concentrations below ca. 12%, the peptide does not self-assemble but forms a molecularly dispersed solution. Above this critical concentration, however, A6K self-assembles into several-micrometer-long hollow nanotubes with a monodisperse cross-sectional radius of 26 nm. Because the peptides carry a positive charge, the nanotubes are charge-stabilized. Because of the very large aspect ratio, the tubes form an ordered phase that presumably is nematic. |
| Databáze: | OpenAIRE |
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