X-ray photoelectron analysis of surface functional groups on diamond-like carbon films by gas-phase chemical derivatization method

2010 ◽  
Vol 42 (2) ◽  
pp. 77-87 ◽  
Author(s):  
Susumu Takabayashi ◽  
Keishi Okamoto ◽  
Hiroaki Motoyama ◽  
Tatsuyuki Nakatani ◽  
Hiroyuki Sakaue ◽  
...  
Keyword(s):  
Gas Phase ◽  
Functional Groups ◽  
Carbon Films ◽  
Diamond Like Carbon ◽  
Chemical Derivatization ◽  
Surface Functional Groups ◽  
X Ray ◽  
Phase Chemical

scholarly journals Structural Characterization of Graphene Oxide: Surface Functional Groups and Fractionated Oxidative Debris

Nanomaterials ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 1180 ◽  
Author(s):  
Elvin Aliyev ◽  
Volkan Filiz ◽  
Muntazim M. Khan ◽  
Young Joo Lee ◽  
Clarissa Abetz ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Graphene Oxide ◽  
Functional Groups ◽  
Structural Model ◽  
Oxide Surface ◽  
Resonance Spectroscopy ◽  
X Ray Diffraction ◽  
Surface Functional Groups ◽  
X Ray ◽  
Transmission Electron

The purpose of this work is the structural analysis of graphene oxide (GO) and by means of a new structural model to answer the questions arising from the Lerf–Klinowski and the Lee structural models. Surface functional groups of GO layers and the oxidative debris (OD) stacked on them were investigated after OD was extracted. Analysis was performed successfully using Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible spectroscopy (UV-Vis), X-ray photoemission spectroscopy (XPS), energy-dispersive X-ray spectroscopy (EDX), Raman spectroscopy, solid-state nuclear magnetic resonance spectroscopy (SSNMR), standardized Boehm potentiometric titration analysis, elemental analysis, X-ray diffraction (XRD), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The analysis showed that graphene oxide layers, as well as oxidative debris contain different functional groups such as phenolic –OH, ketone, lactone, carboxyl, quinone and epoxy. Based on these results, a new structural model for GO layers is proposed, which covers all spectroscopic data and explains the presence of the other oxygen functionalities besides carboxyl, phenolic –OH and epoxy groups.

Use of diamond-like carbon films in X-ray optics

1997 ◽  
Vol 6 (5-7) ◽  
pp. 902-905 ◽  
Author(s):  
P.E. Kondrashov ◽  
I.S. Smirnov ◽  
E.G. Novoselova ◽  
A.M. Baranov
Keyword(s):  
Carbon Films ◽  
Diamond Like Carbon ◽  
Ray Optics ◽  
X Ray

Study of hydrogenated diamond-like carbon films using x-ray reflectivity

1999 ◽  
Vol 86 (1) ◽  
pp. 289-296 ◽  
Author(s):  
Qing Zhang ◽  
S. F. Yoon ◽  
Rusli ◽  
J. Ahn ◽  
H. Yang ◽  
...  
Keyword(s):  
Carbon Films ◽  
Diamond Like Carbon ◽  
X Ray

Nanostructure Evolution and Optical Properties of Silver Doped Diamond Like Carbon Thin Film on Soft Polymer

2018 ◽  
Vol 24 (8) ◽  
pp. 5731-5736 ◽  
Author(s):  
Md. Shahbaz Alam ◽  
Chandan Kumar Ghosh ◽  
Nillohit Mukherjee ◽  
Sk. Faruque Ahmed
Keyword(s):  
Optical Properties ◽  
Photoelectron Spectroscopy ◽  
Strain Energy ◽  
Elastic Moduli ◽  
Optical Band Gap ◽  
Carbon Films ◽  
Diamond Like Carbon ◽  
Spectroscopy Analysis ◽  
X Ray ◽  
Soft Polymer

Effect of silver doping on nanostructure evolution and optical properties of diamond like carbon films synthesized on elastomeric polymer of poly-dimenthylsiloxane (PDMS) and silicon substrate via radio frequency reactive sputtering technique were studied in detail. Due to difference in elastic moduli of PDMS substrate and silver doped diamond like carbon (Ag:DLC) films, a well-defined nanostructure wrinkle pattern have formed on PDMS for releasing the strain energy induced by residually compressed stress in Ag:DLC film. X-ray photoelectron spectroscopy analysis revealed the different bonding information between silver and carbon and the chemical composition of the Ag:DLC films. The introduction of silver in the DLC matrix, decreased the optical transparency as well as the optical band gap from 3.97 to 3.25 eV with a variation of Ag at.% from 0 to 9.2 in the films. The Urbach parameter calculated from the transmitance data, increased with the increase of the Ag doping percentage.

scholarly journals Carbon Nanotubes Incorporated Z-Scheme Assembly of AgBr/TiO2 for Photocatalytic Hydrogen Production under Visible Light Irradiations

Nanomaterials ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1767 ◽  
Author(s):  
Nasir Shezad ◽  
Ibrahim M. Maafa ◽  
Khairiraihanna Johari ◽  
Ainy Hafeez ◽  
Parveen Akhter ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Visible Light ◽  
Functional Groups ◽  
H2 Production ◽  
Green Energy ◽  
Photoelectron Spectra ◽  
Surface Functional Groups ◽  
Electron Mediator ◽  
X Ray ◽  
Vis Spectroscopy

Photocatalytic H2 production is a promising strategy toward green energy and alternative to carbon-based fuels which are the root cause of global warming and pollution. In this study, carbon nanotubes (CNTs) incorporated Z-scheme assembly of AgBr/TiO2 was developed for photocatalytic H2 production under visible light irradiations. Synthesized photocatalysts were characterized through transmission electron microscope (TEM), X-ray photoelectron spectra (XPS), X-ray diffractometer (XRD), Fourier transform infrared (FTIR), photoluminescence spectra (PL), Brunauer Emmet-Teller(BET), and UV-vis spectroscopy analysis techniques. The composite photocatalysts exhibited a H2 production of 477 ppm which was three-folds higher than that produced by TiO2. The good performance was attributed to the strong interaction of three components and the reduced charge recombination, which was 89 and 56.3 times lower than the TiO2 and AgBr/TiO2. Furthermore, the role of surface acidic and basic groups was assessed and the photocatalytic results demonstrated the importance of surface functional groups. In addition, the composites exhibited stability and reusability for five consecutive cycles of reaction. Thus, improved performance of the photocatalyst was credited to the CNTs as an electron mediator, surface functional groups, higher surface area, enhanced charge separation and extended visible light absorption edge. This work provides new development of Z-scheme photocatalysts for sustainable H2 production.

scholarly journals Effect of CeO2 nanomaterial surface functional groups on tissue and subcellular distribution of Ce in tomato (Solanum lycopersicum)

2019 ◽  
Vol 6 (1) ◽  
pp. 273-285 ◽  
Author(s):  
Jieran Li ◽  
Ryan V. Tappero ◽  
Alvin S. Acerbo ◽  
Hanfei Yan ◽  
Yong Chu ◽  
...  
Keyword(s):  
Solanum Lycopersicum ◽  
Functional Groups ◽  
Subcellular Distribution ◽  
Surface Functional Groups ◽  
Tomato Plants ◽  
X Ray ◽  
Manufactured Nanomaterials ◽  
Recent Advances

Using recent advances in X-ray microscopy, this study aimed to elucidate mechanisms of uptake, subcellular distribution, and translocation of functionalized CeO2 MNM (manufactured nanomaterials), having different charges, by tomato plants (Solanum lycopersicum cv Micro-Tom).

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