Comparative study on predicting Young's modulus of graphene sheets using nano-scale continuum mechanics approach

Rafiee, Roham; Eskandariyun, Amirali

doi:10.1016/j.physe.2017.03.006

Cited by 31 publications

(9 citation statements)

References 36 publications

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“…The small shear modulus, bulk modulus, and elastic constant ( c ij ) values also support this conclusion. In addition, the Young’s modulus ( E ) characterizes the strength characteristics and is calculated as 9.26/5.54 GPa for C n / S n materials, between the data of metal lithium (4.9 GPa) and lead (18 GPa) but much lower than that of graphite flakes (795 GPa) . Therefore, they are anticipated to be elastic materials due to the good elastic properties along the axial direction.…”

Section: Resultsmentioning

confidence: 99%

Unraveling the Aromatic Rule of Cyclic Superatomic Molecules in π-Conjugated Compounds

Yu,

Wu,

Yuan

et al. 2023

J. Phys. Chem. A

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The aromaticity of π-conjugated compounds has long been a confusing issue. Based on a recently emerged two-dimensional (2D) superatomicmolecule theory, a unified rule was built to decipher the aromaticity of cyclic superatomic molecules of π-conjugated compounds from the chemical bonding perspective. Herein, a series of planar [n]helicenes and [n]circulenes, composed of benzene, thiophene, or furfuran, are systemically studied and seen as superatomic molecules ◊ O n-2 ◊ F 2 or ◊ O n , where superatoms ◊ F and ◊ O denote π-conjugated units with 5 and 4 π electrons, respectively. The ascertained superatomic Lewis structures intuitively display aromaticity with each basic unit meeting the superatomic sextet rule of benzene, similar to classical valence bond theory, which is favored by the synthesized complex π-conjugated compounds comprising different numbers and kinds of subrings. The evolutionary trend of ring currents and chemical bonding suggests a local ribbon-like aromaticity in these π-conjugated compounds. Moreover, nonplanar helical π-conjugated compounds have the potential to evolve into spring-like periodic materials with excellent physical properties.

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Section: Resultsmentioning

confidence: 99%

Unraveling the Aromatic Rule of Cyclic Superatomic Molecules in π-Conjugated Compounds

Yu,

Wu,

Yuan

et al. 2023

J. Phys. Chem. A

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“…As already described, the considered nanomechanical resonator consists of simply supported SLGS or DLGS with the [43], molecular dynamics [44,45] or MD, continuum mechanics approach [46,47], finite element modeling [48], and experimental investigation [49] in order to determine its value. All these analyses gave Young's modulus of graphene sheet around 1 TPa which will be used as Young's modulus in our simulations.…”

Section: Resultsmentioning

confidence: 99%

NEMS Resonators for Detection of Chemical Warfare Agents Based on Graphene Sheet

Anđelić

Car

Čanađija

2019

Mathematical Problems in Engineering

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Graphene sheets are the basis of nanoelectromechanical (NEMS) mass resonators that are in recent years experimentally used for detection of specific gas molecules in air. The aim of this paper is to theoretically investigate the possibility of application of graphene sheets in detection of Chemical Warfare Agents (CWA’s). By application of the nonlocal theory of elasticity and classical plate theory, equations that describe natural vibrations of the simply supported single-layer graphene sheet (SLGS) and double-layer graphene sheet (DLGS) were derived. In order to detect attached CWA molecule, the frequency shift method was applied. The results indicate that the proposed methodology could be successfully implemented in order to detect an attached CWA molecule. However, only specific mode shapes could be employed for such detection.

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“…Thus, they are limited to small unit‐cells. Similar to other nano‐structures like CNT and graphene , it is expected that the Young's modulus of nanoclay platelet depends on its size due to its inherent behavior at nanoscale. No study has been systematically analyzed the influence of unit‐cell size on the mechanical properties of nanoclay platelets.…”

Section: Gap Analysismentioning

confidence: 95%

Mechanical Properties of Nanoclay and Nanoclay Reinforced Polymers: A Review

Rafiee

Shahzadi

2018

Polymer Composites

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A literature review is conducted on performed investigations for characterizing Young's modulus of nanoclay platelet as the reinforcing agent of nanoclay/polymer nanocomposites from both experimental and theoretical aspects. The observed discrepancies in the reported results are discussed accordingly. All available investigations for predicting mechanical properties of nanoclay reinforced polymers are also reviewed. The employed methods in ongoing studies are categorized into three groups as atomistic, continuum and multiscale modeling techniques. Those challenging issues which are still in need of more accurate understanding and discussion are identified and outlined through a gap analysis on current investigations. The introduced shortcomings can be considered as prospective research areas for the future studies in the field of estimating mechanical properties of nanoclay based composites. POLYM. COMPOS., 40:431–445, 2019. © 2018 Society of Plastics Engineers

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Comparative study on predicting Young's modulus of graphene sheets using nano-scale continuum mechanics approach

Cited by 31 publications

References 36 publications

Unraveling the Aromatic Rule of Cyclic Superatomic Molecules in π-Conjugated Compounds

Unraveling the Aromatic Rule of Cyclic Superatomic Molecules in π-Conjugated Compounds

NEMS Resonators for Detection of Chemical Warfare Agents Based on Graphene Sheet

Mechanical Properties of Nanoclay and Nanoclay Reinforced Polymers: A Review

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