Open AccessОценки констант электрон-фононной связи молекул газа с графеном
Author(s) -
С.Ю. Давыдов
Publication year - 2018
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2018.03.45577.17045
Subject(s) - graphene , materials science , doping , condensed matter physics , phonon , dimensionless quantity , ideal (ethics) , graphene nanoribbons , coupling constant , coupling (piping) , nanotechnology , chemical physics , optoelectronics , physics , quantum mechanics , law , composite material , political science
The adsorption of CO, NO, NO_2, Н_2О, and NH_3 molecules on ideal graphene and graphene doped with aluminum is analyzed using simple models. The constants of electron–phonon coupling are evaluated with the Lennard-Jones 6–12 potential for ideal graphene and the 2–4 potential for doped graphene. It is demonstrated that the dimensionless electron–phonon-coupling constant for ideal graphene is ζ ≫ 1, while ζ ~ 1 corresponds to graphene doped with aluminum. Ways to use both types of graphene as a resistive gas sensor are discussed.