Defect-Engineered Graphene Nanoribbons for Enhanced DNA Sequencing: A Study of Structural Defects and Their Impact on Nucleobase Interaction and Quantum Transport.

ABSTRACT: Graphene, a low-dimensional material, has shown significant promise in bioelectronics over the past two decades. Most research in this field has focused on pristine graphene. However, experimentally fabricated two-dimensional (2D) graphene and one-dimensional (1D) graphene nanoribbons (GNRs) often contain impurities, such as Stone-Wales (sw) and divacancy (dv) defects. In this study, we conducted a comparative analysis of the adsorption behavior of DNA nucleobases-adenine (A), guanine (G), thymine (T), and cytosine (C)─on three types of graphene nanoribbon (GNR) surfaces: pristine (prGNR), divacancy-defected (dvGNR), and Stone-Wales-defected (swGNR). Using semilocal (PBE) and van der Waals-corrected density functional theory methods (vdW-DF2 and PBE-D2), we evaluated the binding energies o

SUBMITTER: Kumawat RL 

PROVIDER: S-EPMC12498413 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature