Special issue on the materials of the International Conference "Nanocarbon and Diamond" (NiA'2024)
Physics of nanostructures

Adsorption of organic macromolecule on free-standing and epitaxial graphene having gap in electronic spectrom

S. Yu. Davydov^a, O. V. Posrednik<sup>b

a</sup> Ioffe Institute, St. Petersburg, Russia
^b Saint Petersburg Electrotechnical University "LETI", St. Petersburg, Russia

Abstract: The contact of an organic macromolecule (MM) with free-standing and epitaxial graphene hav-ing gap in the electronic spectrum is considered within the framework of the previously proposed dangling bond model (S.Yu. Davydov. Phys. Solid State, 64, 2018 (2022)) and the HOMO-LUMO model. The main attention is paid to local states in the gap that arise due to the adsorption of MM, for whose energy and occupation numbers analytical expressions are obtained. SiC polytypes are considered as graphene substrates. The possibility of using gapped graphene in resistive biosensors is briefly discussed.

Keywords: macromolecule, gapped graphene, sic polytypes, local states.

Received: 14.10.2024
Revised: 14.10.2024
Accepted: 14.10.2024

DOI: 10.61011/JTF.2025.03.59862.324-24

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