Observation of Electrically Tunable van der Waals Interaction in Graphene-Molecule Complex

Abstract

van der Waals (vdW) interaction plays a fundamental role in the surface-molecules related phenomena. Tuning of the correlated charge fluctuation in the vdW complex is a plausible way to modulate the molecules interaction at the atomic surface. We report vdW interaction tunability of the graphene-CO${}_2$ complex by combining the first principle calculations with the vdW exchange correlation density functionals and the time evaluation measurements of CO${}_2$ molecules adsorption/desorption on graphene under an external electric field. The field-dependent charge transfer within the complex unveils the controllable tuning of CO${}_2$ from acceptor to donor. Meanwhile the configuration of the adsorbed molecule - the equilibrium distance from graphene and O-C-O bonding angle - is modified accordingly. The range of electrical tunability is a unique feature for each type of molecules.

4 pages, 3 figures

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Cited by in corpus (7)

• Finite-temperature properties of non-magnetic transition metals: Comparison of the performance of constraint-based semi and nonlocal functionals
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• Tuning hydrogen adsorption on graphene by gate voltage
• Comprehensive Quantum Framework for Describing Retarded and Non-Retarded Molecular Interactions in External Electric Fields
• Molecular Interactions Induced by a Static Electric Field in Quantum Mechanics and Quantum Electrodynamics
• Photochemical reaction on graphene surfaces controlled by substrate-surface modification with polar self-assembled monolayers
• Anomalous Random Telegraphy Signal in Suspended Graphene with Oxygen Adsorption