Mir Masoud Seyyed Fakhrabadi: Modal analysis and vibrational properties of two-dimensional nanomaterials

posted 11 Jul 2017, 06:46 by info admin
School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran

Nanomechanical properties of 2D nanomaterials in general and their vibrational properties in particular are very important for their real engineering applications such as in nanosensors or in nano-electromechanical systems. Besides the experimental techniques to study the vibrational characteristics of different 2D nanostructures, several computational methods are also used for this purpose solely or in combination including quantum-based methods, molecular dynamics, finite element analysis and continuum mechanics. Despite the same goal for all of them that is to obtain the natural frequencies and mode shapes of the nanostructures, each has its own advantages and limitations. This paper aims to illustrate the vibrational properties of the 2D nanomaterials with one-atom thickness (such as graphene and silicon carbide nanosheets) using finite element method and the comparison of the results with those predicted by continuum elasticity. Both of the vibration frequencies and mode shapes are compared and the level of agreement is discussed. The pros and cons of this technique in comparison to the atomic-based methods are investigated. If a molecule adsorbs on the surface of the 2D nanostructures, their vibrational frequencies will change and this change can be attributed to the mass of the molecule. The effects of added mass are also be covered.

Mir Masoud Seyyed Fakhrabadi graduated from BS and MS of Mechanical Engineering from the University of Tabriz. He obtained his PhD degree from the University of Tehran in Nanotechnology on nano-electromechanical systems. After the graduation, he worked as the Postdoc fellow at the University of Freiburg in Germany and at the University of Padova in Italy. He is now working as an assistant professor at the University of Tehran on experimental and computational nanomechanics. His awards include a Marie-Curie Postdoc fellowship at the University of Padova, a Postdoc fellowship offered by German research foundation at the University of Freiburg, award of best PhD thesis offered by Iranian society of mechanical engineering, award of the most distinguished university student entitled by Iranian ministry of science and technology, first rank in all BS, MS and PhD levels, and many other awards and honors.