Co-localised Raman and force spectroscopy reveal the roles of hydrogen bonds and π-π interactions in defining the mechanical properties of diphenylalanine nano- and micro-tubes

Sinjab, Faris and Bondakov, Georgi and Notingher, Ioan (2014) Co-localised Raman and force spectroscopy reveal the roles of hydrogen bonds and π-π interactions in defining the mechanical properties of diphenylalanine nano- and micro-tubes. Applied Physics Letters, 104 (25). 251905/1-251905/5. ISSN 1077-3118

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Abstract

An integrated atomic force and polarized Raman microscope were used to measure the elastic properties of individual diphenylalanine (FF) nano- and micro-tubes and to obtain quantitative information regarding the inter-molecular interactions that define their mechanical properties. For individual tubes, co-localised force spectroscopy and Raman spectroscopy measurements allowed the calculation of the Young’s and shear moduli (2565 GPa and 0.2860.05 GPa, respectively) and the contribution of hydrogen bonding network to the Young’s modulus (!17.6 GPa). The p-p interactions between the phenyl rings, dominated by T-type arrangements, were estimated based on previously published X-ray data to only 0.20 GPa. These results provide experimental evidence obtained from individual FF tubes that the network of H-bonds dominates the elastic properties of the FF tubes.

Item Type: Article
Additional Information: Copyright 2014 AIP Publishing. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Sinjab, F., Bondakov, G., Notingher, I. Co-localised Raman and force spectroscopy reveal the roles of hydrogen bonds and π-π interactions in defining the mechanical properties of diphenylalanine nano- and micro-tube Applied Physics Letters 104, 251905 (2014) and may be found at http://dx.doi.org/10.1063/1.4885090.
Schools/Departments: University of Nottingham UK Campus > Faculty of Science > School of Physics and Astronomy
Identification Number: https://doi.org/10.1063/1.4885090
Depositing User: Eprints, Support
Date Deposited: 16 Feb 2016 08:30
Last Modified: 16 Sep 2016 00:31
URI: http://eprints.nottingham.ac.uk/id/eprint/31730

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