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Maxim K. Rabchinskii Vladimir V. Shnitov Dina Yu. Stolyarova Sergei A. Ryzhkov Marina V. Baidakova Eugenia Yu. Lobanova 《Fullerenes, Nanotubes and Carbon Nanostructures》2020,28(3):221-225
AbstractThe one-step method for graphene oxide (GO) simultaneous reduction and carboxylation via ultraviolet irradiation in the inert atmosphere has been reported. X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS) data revealed that the proposed approach allows to obtain reduced graphene oxide (rGO) films, containing up to 10 at.% of carboxyl groups. The carboxyl groups concentration can be tuned within the range of 3 to 10 at.% by controlling the oxidation degree of the irradiated GO via the preliminary low-temperature air heating. Furthermore, no carboxylation effect is observed in the case of irradiation of the completely reduced GO films. This coincides with our previous results, validating the proposed model of GO carboxylation based on photoinduced conversion of basal-plane hydroxyl groups and ketones into carboxyl ones. Despite a different degree of carboxylation, all the obtained samples demonstrate almost complete elimination of basal plane groups and restoration of the graphene flakes aromatic structure. This fact is emphasized by the sheet resistance measurements, demonstrating that the obtained C-xy graphene exhibits high electrical conductivity. As a net result, the material obtained by the presented method shows promising applications in the manufacturing of biosensor transducers owing to both its conductive nature and presence of carboxyl groups, playing the role of the anchoring points for biomolecules. 相似文献
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Lebedev S. P. Eliseyev I. A. Panteleev V. N. Dementev P. A. Shnitov V. V. Rabchinskii M. K. Smirnov D. A. Zubov A. V. Lebedev A. A. 《Semiconductors》2020,54(12):1657-1660
Semiconductors - The structural and some other characteristics of quasi-freestanding single-layer graphene obtained by annealing of the buffer layer in the flow of hydrogen are studied in... 相似文献
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V. M. Mikoushkin V. V. Shnitov S. Yu. Nikonov A. T. Dideykin S. P. Vul’ A. Ya. Vul’ D. A. Sakseev D. V. Vyalikh O. Yu. Vilkov 《Technical Physics Letters》2011,37(10):942-945
Transformation of the chemical composition and electron structure of graphite oxide (GO) nanolayers as a result of their annealing
in hydrogen has been studied by X-ray photoelectron spectroscopy using synchrotron radiation. It is established that both
the chemical composition and bandgap width of GO can be controlled by varying the temperature and duration of heat treatment.
By this means, the properties of GO nanolayers can be smoothly changed from dielectric to semiconductor. 相似文献
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V. M. Mikoushkin V. V. Shnitov V. V. Bryzgalov Yu. S. Gordeev O. V. Boltalina I. V. Goldt S. L. Molodtsov D. V. Vyalikh 《Technical Physics Letters》2009,35(3):256-259
The structure of C1s and F1s core electron levels in C60F18 and C60F36 fluorinated fullerenes has been studied by X-ray photoelectron spectroscopy using synchrotron radiation. It is established
that C1s levels of carbon atoms not bound to fluorine in these compounds are shifted down by 1.0 and 1.6 eV relative to the C1s level in the usual C60 fullerene, so that the binding energies of the core electron levels in C60F18 and C60F36 amount to E
b (C1s, C-C) = 285.7 and 286.3 eV, respectively. These values are characteristic and can be used for the identification of both
homogeneous fluorinated fullerenes and combined materials comprising a mixture of various fluorinated fullerenes with each
other and with different carbon-containing based materials. 相似文献
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M. V. Baidakova A. T. Dideikin S. I. Pavlov R. V. Sokolov V. V. Shnitov 《Technical Physics Letters》2014,40(9):739-742
An aerosol method for deposition of nanometer-thick layers of detonation diamonds has been developed. Application of a suspension of deagglomerated diamond particles onto substrates from an aerosol provides deposition of small-size drops, with the ultrasonic spraying of the suspension precluding formation of secondary agglomerates of nanodiamond particles in the course of sample drying. The layers are promising for high-precision studies of the structure and chemical composition of the surface of isolated nanodiamond particles. 相似文献
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