Lattice dynamics, thermal properties

On the analytical theory of a graphene-based resistive biosensor

S. Yu. Davydov

Ioffe Institute, St. Petersburg, Russia

Abstract: A single-sheet graphene (through which an electric current is passed) encapsulated by a massive semiconductor substrate and an organic macromolecule (biomolecule-antibody) is considered as a resistive biosensor. The organic macromolecule (biomolecule-antigen) being tested is placed on top of the antibody. Expressions for the concentrations of current carriers in graphene before and after the antigen placement are obtained within the framework of simple models. The conditions under which the presence of an antigen changes the type of conductivity of graphene are determined.

Keywords: encapsulated graphene, antibody (bioreceptor), antigen (biomarker).

Received: 11.11.2023
Revised: 13.01.2024
Accepted: 13.01.2024

DOI: 10.61011/FTT.2024.02.57256.251

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