English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The presence of defects such as vacancies in solids has prominent effects ontheir mechanical properties. It not only modifies the stiffness and strength ofmaterials, but also changes their morphologies. The latter effect is extremelysignificant for low- dimensional materials such as graphene. We show in thiswork that graphene swells while point defects such as vacancies are created atfinite concentrations. The distorted geometry resulted from this arealexpansion, in combination with the in-plane softening effect, predicts anunusual defect concentration dependence of stiffness measured for supportedgraphene membrane in nanoindentation tests, which explains the defect- inducedstiffening phenomenon reported recently. The mechanism is elucidated through ananalytical membrane model as well as numerical simulations at atomistic andcontinuum levels. In addition to elucidate the counter-intuitive observationsin experiments and computer simulations, our findings also highlight the roleof defect- modulated morphology engineering that can be quite effective indesigning nanoscale material and structural applications.

Geometrical Effect Explains Graphene Membrane Stiffening at Finite Vacancy Concentrations