Current flow patterns in graphene nanomesh films functionalized with carbonyl and carboxyl groups

P.V. Barkov ORCID logo , M.M. Slepchenkov ORCID logo , O.E. Glukhova ORCID logo show affiliations and emails
Received 18 April 2024; Accepted 06 May 2024;
Citation: P.V. Barkov, M.M. Slepchenkov, O.E. Glukhova. Current flow patterns in graphene nanomesh films functionalized with carbonyl and carboxyl groups. Lett. Mater., 2024, 14(3) 210-215
BibTex   https://doi.org/10.48612/letters/2024-3-210-215

Abstract

The influence of COOH and C=O groups on the I-V characteristics of graphene nanomesh. Depending on the type of group, one can either strengthen or weaken the effect of negative differential resistance on the I-V characteristic.This paper is devoted to studying the influence of functional groups on the electron transport properties in 2D structures of graphene nanomesh (GNM) using the self-consistent-charge density-functional tight-binding (SCC-DFTB) method and Landauer−Buttiker formalism. GNM thin films with almost round holes with a diameter of 1.2 nm are chosen as the object of study. Calculations of the electron-energy and electrical characteristics of GNM are carried out for two types of functional groups: carboxyl (COOH) and carbonyl (C=O). To assess the prospects for using GNM films as a conducting channel in field-effect transistors, current-voltage (I-V) characteristics were calculated in the absence and presence of functional groups. To interpret the obtained results, the patterns of electron transport and electric charge transfer in the “GNM + functional groups” system are identified.

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Funding

1. Russian Science Foundation - 23-72-01122