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; Bondakov, Georgi; Notingher, Ioan

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.

Citation

Sinjab, F., Bondakov, G., & Notingher, I. (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), Article 251905. https://doi.org/10.1063/1.4885090

• Journal Article Type: Article
• Publication Date: Jan 1, 2014
• Deposit Date: Feb 16, 2016
• Publicly Available Date: Feb 16, 2016
• Journal: Applied Physics Letters
• Print ISSN: 0003-6951
• Electronic ISSN: 1077-3118
• Publisher: American Institute of Physics
• Peer Reviewed: Peer Reviewed
• Volume: 104
• Issue: 25
• Article Number: 251905
• DOI: https://doi.org/10.1063/1.4885090
• Public URL: https://nottingham-repository.worktribe.com/output/999798
• Publisher URL: http://scitation.aip.org/content/aip/journal/apl/104/25/10.1063/1.4885090
• 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 p-p 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.