Precise manipulation of metallic nanoparticles: Multiscale analysis

Korayem, Moharam Habibnejad; Sadeghzadeh, Sadegh; Rahneshin, V.; Homayooni, A.; Safa, M.

doi:10.1016/j.commatsci.2012.08.028

Cited by 16 publications

(6 citation statements)

References 14 publications

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“…In the common boundaries of the NF region, some magnitude of force, which arises from the forces of atoms inside the cut-off radius of the contact surface of two NF fields, should be considered. It should be mentioned that, except in the areas of direct contact between surfaces (where the effect of friction is modeled with the inclusion of some impacts), in the above equations, the viscous friction force f D i is uniformly applied to the atoms inside the IVs and UVs [27]. A same strategy could be observed in [28].…”

Section: Large-small Coupling Modelmentioning

confidence: 91%

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Benchmarking the penetration-resistance efficiency of multilayer graphene sheets due to spacing the graphene layers

Sadeghzadeh

2016

Appl. Phys. A

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In this paper, the penetration-resistance efficiency of single-layer and multilayer graphene sheets has been investigated by means of the multiscale approach. The employed multiscale approach has been implemented by establishing a direct correlation between the finite element method and the molecular dynamics approach and validated by comparing its results with those of the existing experimental works. Since by using numerous techniques, a new class of graphene sheets can be fabricated in which the graphene layers are spaced farther apart (more than the usual distance between layers), this paper has concentrated on the optimal spacing between graphene layers with the goal of improving the impact properties of graphene sheets as important candidates for novel impact-resistant panels. For this purpose, the relative protection (protection with respect to weight) values of graphene sheets were obtained, and it was observed that the relative protection of a singlelayer graphene sheet is about 3.64 times that of a 20-layer graphene sheet. This study also showed that a spaced multilayer graphene sheet, with its inter-layer distance being 20 times the usual spacing between ordinary graphene layers, has an impact resistance which is about 20 % higher than that of an ordinary 20-layer graphene sheet. The findings of this paper can be appropriately used in the design and fabrication of future-generation impact-resistant protective panels.

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Section: Large-small Coupling Modelmentioning

confidence: 91%

“…Proposed multiscale approach was validated in [22,27]. Then, only the graphene-based experiments were focused here.…”

Section: Validationmentioning

confidence: 99%

Benchmarking the penetration-resistance efficiency of multilayer graphene sheets due to spacing the graphene layers

Sadeghzadeh

2016

Appl. Phys. A

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“…The approach is applicable to multi-body mechanical systems. Korayem et al [15] used the FIMM to study the manipulation of metallic nanoparticles. They emphasized on development of simulation times and length scales and solution of the invalidity problem of Continuum Mechanics (CM) approaches at small scales.…”

Section: Introductionmentioning

confidence: 99%

Non-classic multi scale analysis of 2D-manipulation with AFM based on modified couple stress theory

Korayem

Homayooni

2016

Computational Materials Science

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“…[10] However, the impact zone was small enough to refrain the effects of the forces from outside regions, therefore a molecular dynamics method could be implemented. [11] By using the LAMMPS package, MD integrates the discrete equations of motion that are derived as;…”

Section: Introductionmentioning

confidence: 99%

On the oblique collision of gaseous molecules with graphene nanosheets

Sadeghzadeh

2016

Molecular Simulation

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In this paper, normal and tangential coefficients of restitution for gaseous molecules colliding with layerwise (single and few layers) graphene nanosheets were calculated using non-equilibrium molecular dynamics method. The normal and tangential coefficients of restitution depend on impact angle, velocity and landing position of projectiles. These parameters were evaluated computationally by implementation of several operations. Some differences were observed between proposed problem and macro-scale nature. The most notable difference was proportionality between the restitution coefficients and impact velocity, while in the case of macro-scale systems, they have inverse relation. Number of layers of graphene substrate does not contribute significantly to the normal and tangential coefficients of restitution. On the other hand, except for hydrogen, where its normal coefficient of restitution is approximately unity, the normal coefficient of restitution for other gasses increases as impact angle increases. Furthermore, tangential coefficients of restitution reduce with impact angle. These results can offer additional insights for further understanding the impact mechanisms and bombardment-related phenomena in lowdimensional materials. Presented results could be utilised to optimise some applied operations such as porosity generation via bombardment of layered nanostructures, gas detection process, thermal management and pressure sensor applications.

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Precise manipulation of metallic nanoparticles: Multiscale analysis

Cited by 16 publications

References 14 publications

Benchmarking the penetration-resistance efficiency of multilayer graphene sheets due to spacing the graphene layers

Benchmarking the penetration-resistance efficiency of multilayer graphene sheets due to spacing the graphene layers

Non-classic multi scale analysis of 2D-manipulation with AFM based on modified couple stress theory

On the oblique collision of gaseous molecules with graphene nanosheets

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