Low-temperature thermal reduction of graphene oxide: In situ correlative structural, thermal desorption and electrical transport measurements
Alexey Lipatov, Maxime Guinel, Dmitry S. Muratov, Vladislav O. Vanyushin, Peter Wilson, Andrei A. Kolmakov, Alexander Sinitskii
Elucidation of the structural transformations in graphene oxide (GO) upon reduction remains an active and important area of research. We report the results of in situ heating experiments, during which electrical, mass spectrometry, X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM) measurements were carried out correlatively. The simultaneous electrical and temperature programmed desorption (TPD) measurements allowed us to correlate the onset in the electrical conductivity change of GO by five orders of magnitude at about 150oC with the maxima of the rates of desorption of H2O, CO and CO2. We demonstrate that the desorption of these gases is intimately related with (i) the changes in the chemical structure of GO detected by XPS, and (ii) the formation of the nanoscopic holes in GO sheets revealed by TEM. These in situ observations provide a better understanding of the mechanism of the GO thermal reduction.
, Guinel, M.
, Muratov, D.
, Vanyushin, V.
, Wilson, P.
, Kolmakov, A.
and Sinitskii, A.
Low-temperature thermal reduction of graphene oxide: In situ correlative structural, thermal desorption and electrical transport measurements, Applied Physics Letters, [online], https://doi.org/10.1063/1.4996337
(Accessed July 31, 2021)