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Modeling and Motion Analysis of a Nano Mobile Robot Using Molecular Dynamics
, Ph.D. Dissertation Sharif University of Technology ; Meghdari, Ali (Supervisor) ; Sohrabpour, Saeed (Supervisor) ; Nejat Pishkenari, Hossein ($item.subfieldsMap.e)
Abstract
With the rapid progress of technology, the fabrication of smaller electronic and mechanical systems becomes more necessary. To make a small-scale system with better performance, one way is to create it from molecular components. In recent decade, many attempts have been devoted to the fabrication of molecular machines for manipulation of particles at nanoscales. In this project, the motion of two of most basic nanocars namely the Nanocar and the Nanotruck were simulated on gold and silver substrate at different conditions, both of four wheels and the nanotruck chassis is flexible. In the first chapter of this report, some of the most important natural and artificial machines are mentioned...
Nanocar and nanotruck motion on gold surface
, Article 1st International Conference on Manipulation, Automation and Robotics at Small Scales, MARSS 2016, 18 July 2016 through 21 July 2016 ; 2016 ; 9781509015108 (ISBN) ; Nejat Pishkenari, H ; Meghdari, A ; Shorabpour, S ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
Abstract
In this paper we have studied the motion of a nanocar and nanotruck on gold substrate using the classical molecular dynamics method. Analyzing the motion regime of the nanocar at different temperatures is one of the main goals of this paper. In the past years, similar molecules such as Trimmer, Z-car and nanotruck have been simulated by Konyukhov and Akimov. To increase the modeling accuracy in this paper we have used classical molecular dynamics contrary to previous works which used a rigid body molecular dynamics method. The result of our simulations were compared qualitatively to the experimental tests performed by Zhang et al. [12]. There was a good agreement between the results achieved...
Directional control of surface rolling molecules exploiting non-uniform heat-induced substrates
, Article Physical chemistry chemical physics : PCCP ; Volume 22, Issue 46 , 7 December , 2020 , Pages 26887-26900 ; Nejat Pishkenari, H ; Meghdari, A ; Ge, S. S ; Sharif University of Technology
NLM (Medline)
2020
Abstract
Molecular machines, such as nanocars, have shown promising potential for various tasks, including manipulation at the nanoscale. In this paper, we examined the influence of temperature gradients on nanocar and nanotruck motion as well as C60 - as their wheel - on a flat gold surface under various conditions. We also compared the accuracy and computational cost of two different approaches for generating the temperature gradient. The results show that severe vibrations and frequent impacts of gold atoms at high temperatures increase the average distance of C60 from the substrate, reducing its binding energy. Moreover, the temperature field drives C60 to move along the temperature variation;...
Investigation into thermally activated migration of fullerene-based nanocars
, Article Scientia Iranica ; Volume 25, Issue 3F , 2018 , Pages 1835-1848 ; 10263098 (ISSN) ; Meghdari, A ; Nejat Pishkenari, H ; Sohrabpour, S ; Sharif University of Technology
Sharif University of Technology
2018
Abstract
The rotational and translational motions of nanocars and nanotrucks as well as their motion regimes at different temperatures are investigated. In recent years, few similar types of molecular machines have been simulated. In contrast to previous studies, which have used the Rigid-Body Molecular Dynamics (RBMD) method, an all-atom model and classic atomistic dynamics have been employed in this paper to achieve better accuracy. Our results demonstrated that the exibility of the chassis and its attachment to the gold surface played an important role in the motion of a nanocar. In fact, a heavier and more exible nanocar chassis reduces its speed compared to a nanotruck. In addition, the results...