Impact dynamics of metallic nano particles in collision with graphene nano sheets

Abstract

In this paper, impact of metallic nanoparticles on graphene sheets was investigated via Non-Equilibrium Molecular Dynamics (NEMD) approach. Considering the unique feature of graphene to absorb motion energy of the materials impacting on it, systems based on graphene can be appropriate solutions for the purpose of damping. The proposed model was validated by available experimental data and simulation. It is demonstrated that mechanics of impact are not multidimensional problems; therefore, they can be studied by molecular dynamics. E ects of velocity of the particles, impact angle, and number of the graphene sheets on the normal coe cient of restitution of the metallic nanoparticles were researched. Contrarily to macro systems, it was observed that by increasing the velocity of impact, normal coe cient of restitution decreased. Also, the normal coe cient of restitution increased by increasing impact angle. By increasing the graphene sheets, the coe cient was reduced signi cantly. Negative normal coe cient of restitution was observed for some cases, which was also reported in other works on nanostructures. It is shown that a single graphene layer can withstand impacting 3.64 times a 20-layer graphene sheet.

One-pot synthesis of benzopyranophenazines using graphene oxide dichlorotriazine (GO-DCT) under microwave irradiations

“…XRD patterns of graphene oxide dichlorotriazine (GO-DCT) are shown in Figure 1. The characteristic peaks in the spectrum are in agreement with the standard XRD pattern of functionalized-graphene oxides [29][30][31][32][33].…”

“…tached on the graphene surfaces, for potential use in sensors, polymer composites, paper-like materials, photovoltaic applications, and drug-delivery systems [27][28][29][30][31]. Herein, we wish to report the use of graphene oxide dichloro triazine (GO-DCT) as an e cient catalyst for the preparation of benzopyranophenazines by a multicomponent reaction of hydroxynaphthoquinone, o-phenylenediamine, benzaldehydes, and malononitrile under microwave irradiation (Scheme 1).…”