Using the Bending Beam Model to Estimate the Elasticity of Diphenylalanine Nanotubes
- 6 June 2007
- journal article
- Published by American Chemical Society (ACS) in Langmuir
- Vol. 23 (14), 7443-7446
- https://doi.org/10.1021/la7010106
Abstract
The core recognition motif of the amyloidogenic β-amyloid polypeptide, diphenylalanine peptide, has previously been shown to self-assemble into discrete, well-ordered, stiff nanotubes under mild conditions. The nanotubes keep the same morphology from room temperature up to 100 °C. In the presented study, we applied the bending beam model to atomic force microscopy images of diphenylalanine nanotubes suspended across cavities and obtained the Young’s modulus 27 ± 4 GPa and the shear modulus 0.21 ± 0.03 GPa. We also showed that the elasticity of these nanotubes is stable within the same temperature range and at relative humidity from 0% to 70%. This study furthers our understanding of the structure and properties of these nanotubes, which are important for their potential applications in biotechnology.Keywords
This publication has 2 references indexed in Scilit:
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- Mechanics of MaterialsPublished by Springer Science and Business Media LLC ,1991