Journal ArticleDOI
Spectroscopic determination of the structure of amorphous nitrogenated carbon films
TLDR
In this article, the relative contribution of C=N and C-N bonds is found to change with the variation of the nitrogen content in the samples, which shows a similar trend with the shift of the G peak to a higher wave number and the increase of the ID/IG ratio.Abstract:
Studies on structure and electronic properties of amorphous nitrogenated carbon films prepared in dual electron cyclotron resonance–radio frequency plasma from a mixture of methane and nitrogen are presently reported. These films are characterized by Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, x-ray photoemission spectroscopy (XPS), ultraviolet photoemission spectroscopy (UPS), electrical conductivity measurement, and optical absorption spectroscopy. Symmetry breaking of aromatic rings are at a very small amount of nitrogen incorporation is understood from FTIR spectra. The relative contribution of C=N and C–N bonds is found to change with the variation of the nitrogen content in the samples, which shows a similar trend with the shift of the G peak to a higher wave number and the increase of the ID/IG ratio. From decomposition of XPS C 1s and N 1s peaks a three-phase model of CN bonds is proposed. UPS valence band spectra obtained by using a Helium II source, are decomposed into p-...read more
Citations
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Porous Li4Ti5O12 Coated with N‐Doped Carbon from Ionic Liquids for Li‐Ion Batteries
TL;DR: In this paper, a uniform nitrogen-doped carbon coating layer is formed on Li4Ti5O12 particles by mixing porous Li4T2O12 powder with an ionic liquid and then treating the mixture at moderate temperature.
Journal ArticleDOI
Interpretation of infrared and Raman spectra of amorphous carbon nitrides
TL;DR: In this paper, a general framework for the interpretation of infrared and Raman spectra of amorphous carbon nitrides is presented, which can be used to explain the large dynamic charge of the more delocalized bonding which occurs in more than two bonded networks.
Journal ArticleDOI
Electrocatalytic Activity and Stability of Nitrogen-Containing Carbon Nanotubes in the Oxygen Reduction Reaction
Shankhamala Kundu,Tharamani Chikka Nagaiah,Wei Xia,Yuemin Wang,Stefan Van Dommele,Johannes H. Bitter,M. Santa,Guido Grundmeier,Michael Bron,Wolfgang Schuhmann,Martin Muhler +10 more
TL;DR: In this paper, Nitrogen-containing carbon nanotubes (NCNTs) were prepared via pyrolysis of acetonitrile over cobalt catalysts at different temperatures to control the nitrogen content.
Journal ArticleDOI
X-Ray photoelectron spectroscopy reference data for identification of the C3N4 phase in carbon–nitrogen films
A.P. Dementjev,de A Ariël Graaf,van de Mcm Richard Sanden,Konstantin I. Maslakov,Alexander V. Naumkin,AA Serov +5 more
TL;DR: In this paper, the binding energy of the C1s and N1s XPS peaks in melamine (C3N6H6) was determined relative to the XPS peak for carbon contamination (adventitious carbon).
Journal ArticleDOI
Nanomechanical and nanotribological properties of carbon-based thin films: A review
TL;DR: In this paper, a-C and hydrogenated amorphous carbon (a-C:H) films with a mixture of sp 2 and sp 3 bonding are compared to metal/amorphous carbon composite films.
References
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Journal ArticleDOI
Raman spectroscopy on amorphous carbon films
TL;DR: The origin and interpretation of the Raman features of amorphous (hydrogenated) carbonfilmsdeposited at room temperature in the region of 1000-1700 cm−1 is discussed in this paper.
Journal ArticleDOI
Electronic and atomic structure of amorphous carbon.
John Robertson,Eoin P. O'Reilly +1 more
TL;DR: It is shown that the 1.5-eV optical gap of a-C:H is unusually small and requires that both its valence and conduction band consist of \ensuremath{\pi} states on ${\mathrm{sp}}^{2}$ sites and that these sites must also be significantly clustered, such as in graphitic clusters containing four or more rings.
Journal ArticleDOI
Raman ``fingerprinting'' of amorphous carbon films
TL;DR: In this article, the authors compare the Raman spectra and other macroscopic properties of nearly one hundred amorphous carbon films deposited at five research laboratories by a total of five different methods in search of correlations useful for both process control and basic understanding of these materials.