High-resolution Russian–German beamline at BESSY

Молодцов, С. Л.; Fedoseenko, S. I.; Vyalikh, D. V.; Iossifov, I. E.; Follath, R.; Gorovikov, Serguei; Brzhezinskaya, M. M.; Dedkov, Yuriy; Püttner, R.; Schmidt, Jan-Simon; Adamchuk, V. K.; Gudat, W.; Kaindl, G.

doi:10.1007/s00339-008-4916-1

Cited by 62 publications

(30 citation statements)

References 14 publications

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“…The X‐ray absorption spectra of FLG and HOPG were measured using monochromatic synchrotron radiation and the facilities of the Russian–German optical beamline (RGBL) at the BESSY II synchrotron radiation source . The samples were placed into a measuring high vacuum chamber with a residual gas pressure of ∼5 × 10 –10 Torr.…”

Section: Methodsmentioning

confidence: 99%

“…Note first that the FLG spectrum by the general appearance of the near fine structure (NFS), the number and energy positions of its major features A–F perfectly reproduces all basic features of the spectrum of pyrographite crystal HOPG. This means that the most characteristic peaks of absorption (resonances) A and B–C are due to dipole‐permitted transitions of electrons in the carbon atom to the free states of π‐ and σ‐symmetries of the graphite crystal conductivity bands which are formed from the π2p z ‐ and π2p z ‐states of carbon atoms oriented perpendicular and parallel, respectively, to the plane of carbon layer (graphene) . It is worth noting that by their nature these states are quasimolecular, i.e.…”

Section: Methodsmentioning

confidence: 99%

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Direct growth of graphene film on piezoelectric La₃Ga_5.5Ta_0.5O₁₄ crystal

Brzhezinskaya

Иржак

et al. 2016

Physica Rapid Research Ltrs

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For the first time, a few layer graphene was grown on the surface of the polar X ‐cut (110) of a piezoelectric La3Ga5.5Ta0.5O14 crystal by the CVD method. This polar X ‐cut is characterized by a good matching of the crystal lattice parameters of La3Ga5.5Ta0.5O14 and two‐dimensional graphene crystal, as well as the presence of piezoelectric fields on the surface of the substrate, which could affect the graphene growth process. Raman spectroscopy investigation has shown the ability for direct growth of graphene on the piezoelectric crystal. The NEXAFS spectroscopy studies of the film grown on the surface of the X ‐cut of an La3Ga5.5Ta0.5O14 crystal also confirmed that the grown film is graphene. Moreover, the NEXAFS spectra enable the conclusion that additional electron states are formed as a result of chemical bonding between the atoms of graphene and the substrate which proceeds through hybridization of the valence electron states of the substrate and graphene atoms. (© 2016 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim)

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Direct growth of graphene film on piezoelectric La₃Ga_5.5Ta_0.5O₁₄ crystal

Brzhezinskaya

Иржак

et al. 2016

Physica Rapid Research Ltrs

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“…N-K edge X-ray absorption spectra (XAS), Valence band spectra and Work function spectra were recorded at the Russian-German beamline of electron storage ring BESSY-II (Helmholtz-Zentrum Berlin) using the beamline ultrahigh vacuum experimental station 75 . The XAS measurements were performed in the total electron yield (TEY) mode realized by sweeping the incident photon energy and simultaneously recording the sample drain current.…”

Section: Characterization Of the Initial Go And The Obtained Modifiedmentioning

confidence: 99%

From graphene oxide towards aminated graphene: facile synthesis, its structure and electronic properties

Rabchinskii

Ryzhkov

Kirilenko

et al. 2020

Sci Rep

147

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in this paper we present a facile method for the synthesis of aminated graphene derivative through simultaneous reduction and amination of graphene oxide via two-step liquid phase treatment with hydrobromic acid and ammonia solution in mild conditions. the amination degree of the obtained aminated reduced graphene oxide is of about 4 at.%, whereas C/O ratio is up to 8.8 as determined by means of X-ray photoelectron spectroscopy. the chemical reactivity of the introduced amine groups is further verified by successful test covalent bonding of the obtained aminated graphene with 3-Chlorobenzoyl chloride. The morphological features and electronic properties, namely conductivity, valence band structure and work function are studied as well, illustrating the influence of amine groups on graphene structure and physical properties. particularly, the increase of the electrical conductivity, reduction of the work function value and tendency to form wrinkled and corrugated graphene layers are observed in the aminated graphene derivative compared to the pristine reduced graphene oxide. As obtained aminated graphene could be used for photovoltaic, biosensing and catalysis application as well as a starting material for further chemical modifications.

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“…The X-ray photoelectron spectra were measured on the Russian–German channel of the BESSY-II electron storage ring (Helmholtz-Zentrum Berlin, Berlin, Germany), using an ultrahigh vacuum experimental station on the beam channel [ 39 ]. The survey X-ray photoelectron spectra were measured at an excitation energy of 736 eV with a step of 0.5 eV, 200 μm slit width, and an energy pass value of 50 meV.…”

Section: Methodsmentioning

confidence: 99%

Graphene Oxide Chemistry Management via the Use of KMnO4/K2Cr2O7 Oxidizing Agents

et al. 2021

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In this paper, we propose a facile approach to the management of graphene oxide (GO) chemistry via its synthesis using KMnO4/K2Cr2O7 oxidizing agents at different ratios. Using Fourier Transformed Infrared Spectroscopy, X-ray Photoelectron Spectroscopy, and X-ray Absorption Spectroscopy, we show that the number of basal-plane and edge-located oxygenic groups can be controllably tuned by altering the KMnO4/K2Cr2O7 ratio. The linear two-fold reduction in the number of the hydroxyls and epoxides with the simultaneous three-fold rise in the content of carbonyls and carboxyls is indicated upon the transition from KMnO4 to K2Cr2O7 as a predominant oxidizing agent. The effect of the oxidation mixture’s composition on the structure of the synthesized GOs is also comprehensively studied by means of X-ray diffraction, Raman spectroscopy, transmission electron microscopy, atomic-force microscopy, optical microscopy, and the laser diffraction method. The nanoscale corrugation of the GO platelets with the increase of the K2Cr2O7 content is signified, whereas the 10–100 μm lateral size, lamellar, and defect-free structure is demonstrated for all of the synthesized GOs regardless of the KMnO4/K2Cr2O7 ratio. The proposed method for the synthesis of GO with the desired chemistry opens up new horizons for the development of graphene-based materials with tunable functional properties.

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High-resolution Russian–German beamline at BESSY

Cited by 62 publications

References 14 publications

Direct growth of graphene film on piezoelectric La₃Ga_5.5Ta_0.5O₁₄ crystal

Direct growth of graphene film on piezoelectric La₃Ga_5.5Ta_0.5O₁₄ crystal

From graphene oxide towards aminated graphene: facile synthesis, its structure and electronic properties

Graphene Oxide Chemistry Management via the Use of KMnO4/K2Cr2O7 Oxidizing Agents

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High-resolution Russian–German beamline at BESSY

Cited by 62 publications

References 14 publications

Direct growth of graphene film on piezoelectric La3Ga5.5Ta0.5O14 crystal

Direct growth of graphene film on piezoelectric La3Ga5.5Ta0.5O14 crystal

From graphene oxide towards aminated graphene: facile synthesis, its structure and electronic properties

Graphene Oxide Chemistry Management via the Use of KMnO4/K2Cr2O7 Oxidizing Agents

Contact Info

Product

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Direct growth of graphene film on piezoelectric La₃Ga_5.5Ta_0.5O₁₄ crystal

Direct growth of graphene film on piezoelectric La₃Ga_5.5Ta_0.5O₁₄ crystal