Strain and screening effects on field emission properties of armchair graphene nanoribbon arrays: a first-principles study.

ABSTRACT: The field screening effect on the field-emission properties of armchair graphene nanoribbons (AGNRs) under strain has been studied using first-principles calculations with local density approximation (LDA). Using the zone folding method with the effect of a dipole barrier along with the work function of strained graphene, we can obtain the work function of AGNR of any width under strain, confirmed with the LDA calculations. We have systematically investigated the effects of inter-ribbon distance and ribbon width on the work function of AGNR arrays. It is found that the work function of AGNR arrays increases rapidly as the inter-ribbon distance D _x increases, which is caused by the positive dipole at the edge of the ribbon. Using a simple linear interpolation model,

SUBMITTER: Hu H 

PROVIDER: S-EPMC9081386 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature