Open AccessResearch on the dielectric constant of graphene solution at the microwave frequency of 9.212GHz
Author(s) -
Tianyi Jiao,
Na-Yue Shi,
Chong Wu,
Xiu-Yan Chen
Publication year - 2021
Publication title -
materials research express
Language(s) - English
Resource type - Journals
ISSN - 2053-1591
DOI - 10.1088/2053-1591/abdd51
Subject(s) - graphene , dielectric , microwave , materials science , resonator , dielectric resonator , capillary action , microwave cavity , conductivity , constant (computer programming) , analytical chemistry (journal) , condensed matter physics , chemistry , optoelectronics , physics , composite material , nanotechnology , chromatography , quantum mechanics , computer science , programming language
In order to measure the graphene’s dielectric constant, the microwave cavity perturbation method was employed. At the frequency of 9.212 GHz, graphene with three concentrations of 5 g ml −1 , 2.5 g ml −1 and 1.25 g ml −1 was studied respectively. For these three solutions, as inserted depth in the microwave resonator, concentration and capillary’s diameter changed, the dielectric constant’s real part and imaginary part were all measured, calculated and discussed. The results showed that the real part of the graphene’s dielectric constant increased with the increase of the depth of the capillary into the resonator, decreased with the increase of the capillary diameter. The conductivity of graphene solution was measured which decreased with the increase of liquid concentration.