Investigation of geometrical effects in the carbon allotropes manipulation based on AFM: multiscale approach

Korayem, Moharam Habibnejad; Hefzabad, R. N.; Homayooni, A.; Aslani, Hassan

doi:10.1007/s11051-016-3702-9

Cited by 6 publications

(3 citation statements)

References 22 publications

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“…5 They also investigated the geometrical effects in the carbon allotropes manipulation based on molecular dynamics approach. 6 As mentioned earlier, AFM is widely used in identifying mechanical properties of cells. Dimitriadis et al used AFM to determine the modulus of elasticity of thin smooth materials.…”

Section: Introductionmentioning

confidence: 99%

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Contact simulation of soft micro/nano bioparticles for use in identification of mechanical properties and manipulation based on atomic force microscopy

Korayem

Khaksar

Hefzabad

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part K:

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The aim of this paper is to develop and simulate elastic-perfectly plastic contact theories for proper determination and estimation of contact area in manipulation of micro/nano bioparticles. The nanoparticles studied in this paper are categorized into three different cancerous cell types, lowly (LNCaP) and highly metastatic human prostate cancer cells (CL-1, CL-2), two normal bladder cells (Hu609 and HCV29) and three cancerous bladder cells (Hu456, T24 and BC3726). First, Hertz elastic model, finite element, and Brake and Chang elastic-perfectly plastic models with two different elastic states were simulated for Hu609 and Hu456 cells, and the results were compared against each other. Then, material and geometry effects of particles during contact were taken into account. Additionally, contacts of micro/ nanoparticle-substrate and micro/nanoparticle-atomic force microscope tip were studied. The results of contact simulations indicate a meaningful difference in distinct models. It can be inferred from the difference between Brake and Chang elastic-perfectly plastic models and Hertz theory that the latter is unable to describe the contact behaviour of very soft bioparticles. In most of previous studies, elastic contact theories such as Hertz and JKR have been used to calculate mechanical properties of soft particles manipulation; for the first time, however, two Brake and Chang theories have been used here to calculate the mechanical properties of bioparticles and to simulate the contact mechanics for use in biomanipulation based on the atomic force microscopy.

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Section: Introductionmentioning

confidence: 99%

“…5 They also investigated the geometrical effects in the carbon allotropes manipulation based on molecular dynamics approach. 6…”

Section: Introductionmentioning

confidence: 99%

Contact simulation of soft micro/nano bioparticles for use in identification of mechanical properties and manipulation based on atomic force microscopy

Korayem

Khaksar

Hefzabad

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part K:

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“…They also studied two different strategies for protein manipulation [23]. In another study, using molecular dynamics simulation and a multiscale approach, Korayem et al investigated geometrical effects on the manipulation of carbon allotropes [24].…”

Section: Introductionmentioning

confidence: 99%

Nonclassical dynamic modeling of nano/microparticles during nanomanipulation processes

Korayem

Farid

Hefzabad

2020

Beilstein J. Nanotechnol.

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Since the manipulation of particles using atomic force microscopy is not observable in real-time, modeling the manipulation process is of notable importance, enabling us to investigate the dynamical behavior of nanoparticles. To model this process, previous studies employed classical continuum mechanics and molecular dynamics simulations which had certain limitations; the former does not consider size effects at the nanoscale while the latter is time consuming and faces computational restrictions. To optimize accuracy and computational costs, a new nonclassical modeling of the nanomanipulation process based on the modified couple stress theory is proposed that includes the size effects. To this end, after simulating the critical times and forces that are required for the onset of nanoparticle motion on the substrate, along with the dominant motion mode, the nonclassical theory of continuum mechanics and a developed von Mises yield criterion are employed to investigate the dynamical behavior of a cylindrical gold nanoparticle during manipulation. Timoshenko and Euler–Bernoulli beam theories based on the modified couple stress theory are used to model the dynamics of cylindrical gold nanoparticles while the finite element method is utilized to solve the governing equations of motion. The results show a difference of 90% between the classical and nonclassical models in predicting the maximum deflection before the beginning of the dominant mode and a difference of more than 25% in the dynamic modeling of a 200 nm manipulation of a gold nanoparticle with a length of 25 µm and aspect ratio of 30. This difference increases with each increment of the aspect ratio and reduction of manipulation distance. Furthermore, by applying an extended von Mises criterion on the modified couple stress theory, it is found that the failure aspect ratio of a cylindrical gold nanoparticle based on nonclassical models is 212% more than that of the classical model. In the end, the results are compared with those of the classical method on polystyrene nanorods. The results for cylindrical gold nanoparticles indicate that the material length scale has a major effect on the exact positioning of cylindrical nanoparticles.

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A survey on dynamic modeling of manipulation of nanoparticles based on atomic force microscope and investigation of involved factors

Korayem

Khaksar

2020

J Nanopart Res

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Investigation of geometrical effects in the carbon allotropes manipulation based on AFM: multiscale approach

Cited by 6 publications

References 22 publications

Contact simulation of soft micro/nano bioparticles for use in identification of mechanical properties and manipulation based on atomic force microscopy

Contact simulation of soft micro/nano bioparticles for use in identification of mechanical properties and manipulation based on atomic force microscopy

Nonclassical dynamic modeling of nano/microparticles during nanomanipulation processes

A survey on dynamic modeling of manipulation of nanoparticles based on atomic force microscope and investigation of involved factors

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