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Impedance spectroscopy of single graphene layer at gas adsorption
Author(s) -
Skryshevsky V. A.,
Milovanov Yu. S.,
Gavrilchenko I. V.,
Tiagulskyi S. I.,
Rusavsky A. V.,
Lysenko V. S.,
Nazarov A. N.
Publication year - 2015
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201532101
Subject(s) - graphene , raman spectroscopy , dielectric spectroscopy , nyquist plot , materials science , acetone , spectroscopy , analytical chemistry (journal) , adsorption , electrical impedance , layer (electronics) , chemistry , nanotechnology , organic chemistry , electrode , optics , physics , electrical engineering , quantum mechanics , engineering , electrochemistry
Impedance spectroscopy and micro‐Raman spectroscopy were applied for analysis of single graphene layer. Despite that Raman spectra showed the high quality of studied layers (ratio of intensities of the D and G peaks I D / I G is better than <0.01), two semicircles on the Nyquist curve of the Ni–graphene–Ni structure suggest the existence of inhomogeneous regions. Exposure in ethanol and acetone vapors by different degrees affects the reactive and active resistance of graphene film. Moreover, the dynamic response behavior of impedance differs in the vapor of ethanol, acetone, and phenol. It ensures that impedance spectroscopy of graphene is a useful tool for detection of different gases.