Negative Poisson’s ratio in a nonplanar phagraphene

Openov, L. A.; Подливаев, А. И.

doi:10.1134/s106378341706018x

Cited by 12 publications

(3 citation statements)

References 15 publications

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“…The curvatures of these two fitted curves are different owing to the anisotropy of the planar configuration of phagraphene. These results are consistent with the previous theoretical work [28], which states further that if planar graphene is distorted into a nonplanar structure with a wavy shape, abnormal NPR characteristics will appear along the in-plane direction. Thus, we can realize that planar 2D materials are not as flexible as nonplanar 2D materials.…”

Section: Poisson's Ratio Propertiessupporting

confidence: 93%

“…As the most striking physical anomaly, negative thermal expansion (NTE) behavior, dynamic negative compressibility as well as negative Poisson's ratio (NPR) have been reported to occur in graphene by experiment or calculation [24][25][26][27]. Pristine penta-graphene, and rearranged phagraphene which has been constructed to a nonplanar structure can exhibit unusual NPR by theoretical calculations at present [1,28]. NTE, negative linear compressibility (NLC), and NPR are all highly attractive properties, and materials with these properties can have a wide range of applications and prospects.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Penta-graphene and phagraphene: thermal expansion, linear compressibility, and Poisson’s ratio

Wang¹,

Chen²,

Miura³

et al. 2022

J. Phys.: Condens. Matter

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Nonplanar penta-graphene and planar phagraphene, which are connected by carbon pentagons and penta-hexa-hepta carbon rings, respectively, are two allotropes of graphene. Graphene as a star material in two-dimensional (2D) materials has been widely studied. However, the studies around penta-graphene and phagraphene are still insufficient. We are interested in both materials' response to temperature, hydrostatic pressure, and stress. In this work, the thermal expansion, linear compressibility, and Poisson’s ratio of penta-graphene and phagraphene have been investigated systematically. It is found that both materials can exhibit abnormal negative thermal expansion (NTE) behavior, while their linear compressibility behavior is normal. The negative Poisson's ratio (NPR) behavior only occurs in penta-graphene, which is consistent with other work. Through an analysis of the lattice vibrations and associated mode Grüneisen parameters, it is found that there are anomalies in the phonon spectra of both penta-graphene and phagraphene. It is noted that acoustic phonons contribute most to their respective anomalies, especially the transverse acoustic (ZA) mode. The librational motion of the lowest-frequency optical phonon of both materials is identified and also associated with their novel properties. In general, the unique topological arrangement of carbon atoms can play a decisive role in determining the performances of penta-graphene and phagraphene.

show abstract

Section: Poisson's Ratio Propertiessupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Penta-graphene and phagraphene: thermal expansion, linear compressibility, and Poisson’s ratio

Wang¹,

Chen²,

Miura³

et al. 2022

J. Phys.: Condens. Matter

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show abstract

“…Это обеспечивает высокую проводимость графена. Графен обладает большой механической жесткостью ∼ 1 TPa [3][4][5]. Это обеспечивает широкую применимость графена в различных областях промышленности.…”

Section: Introductionunclassified

Исследование механических свойств материалов на основе графена C-=SUB=-62-=/SUB=-H-=SUB=-20-=/SUB=- и полиэтилена (-CH-=SUB=-2-=/SUB=--CH-=SUB=-2-=/SUB=--)-=SUB=-n-=/SUB=-

Байрамов¹,

Gasanov²

2021

Журнал Технической Физики

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In the paper, the mechanical properties of the materials based on graphene С62Н20 and polyethylene (-СН2-СН2-)n have been investigated by using semiempirical PM3 method, and the visual models of molecules have been constructed (-СН2-СН2-)n. The calculated values of mechanical parameters show that these materials possess a high elasticity and strength. The orbital energies, potentials of ionization, full energies of electrons, strengths, etc. for given material have been calculated. Opportunity of using these light materials in engineering industry for making of superstrong protective thin coating on car bumpers have been considered. The necessary minimal thickness of protective coating during two cars collision with given mass and speed has been calculated that bumpers do not damage.

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Predicted Carbon Forms

Kharisov

Kharissova

2019

Carbon Allotropes: Metal-Complex Chemistry, Properties and Applications

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Negative Poisson’s ratio in a nonplanar phagraphene

Cited by 12 publications

References 15 publications

Penta-graphene and phagraphene: thermal expansion, linear compressibility, and Poisson’s ratio

Penta-graphene and phagraphene: thermal expansion, linear compressibility, and Poisson’s ratio

Исследование механических свойств материалов на основе графена C-=SUB=-62-=/SUB=-H-=SUB=-20-=/SUB=- и полиэтилена (-CH-=SUB=-2-=/SUB=--CH-=SUB=-2-=/SUB=--)-=SUB=-n-=/SUB=-

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