Stability of graphene hyperbolic pseudospheres under harsh conditions

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27740%2F25%3A10258824" target="_blank" >RIV/61989100:27740/25:10258824 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11320/25:10505299

Result on the web

<a href="https://link.springer.com/article/10.1007/s00339-025-09040-6" target="_blank" >https://link.springer.com/article/10.1007/s00339-025-09040-6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00339-025-09040-6" target="_blank" >10.1007/s00339-025-09040-6</a>

Result language

angličtina

Original language name

Stability of graphene hyperbolic pseudospheres under harsh conditions

Original language description

We demonstrate the high stability of simulated graphene hyperbolic pseudospheres under large externally imposed deformations and high temperature annealing. Hyperbolic pseudospheres are produced in a two-step Molecular Dynamics simulation process. First, carbon atoms are forced down a thin three-dimensional volume of a chosen shape. During this extrusion process the carbon atoms form a precursor to graphene that is unrealistically less stable than graphite or diamond. Then the unstable carbon structure is annealed inside the thin volume at high temperature, turning the carbon into realistic polycrystalline, curved graphene. Point defects naturally appear in numbers and places that stabilize the graphene in the desired shape, without high residual stresses. We applied this new methodology to the creation of graphene hyperbolic pseudosphere surfaces, which reproduce analogs to some aspects of classical or quantum gravity. The free edges of the pseudosphere cause bending of the graphene. When these free edges are removed from the simulations by attaching periodic flat graphene sheets to the pseudosphere edges, the carbon atoms assume positions just some tenths of Å from the mathematical hyperbolic pseudosphere surface. In demanding tests of their stability, the hyperbolic pseudospheres proved stable against 20° shearing or 20% elongation and then being released, which eventually raised their temperatures by ~ 300 K. Our methodology is relatively easy to use and offers a practical way to create simulated curved graphene surfaces of almost any shape. It allows for thorough testing in advance of the stability of graphene shapes that are to be produced experimentally.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10300 - Physical sciences

Project

—

Continuities

—

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Applied Physics A: Materials Science and Processing

ISSN

0947-8396

e-ISSN

1432-0630

Volume of the periodical

131

Issue of the periodical within the volume

11

Country of publishing house

US - UNITED STATES

Number of pages

11

Pages from-to

937

UT code for WoS article

001605706600004

EID of the result in the Scopus database

2-s2.0-105020941320