Nano Archive

EEL Calculations and Measurements of Graphite and Graphitic-CNx Core-Losses

Seepujak, A and Bangert, U and Harvey, A J and Blank, V D and Kulnitskiy, B A and Batov, D V (2006) EEL Calculations and Measurements of Graphite and Graphitic-CNx Core-Losses. Journal of Physics: Conference Series, 26 . pp. 161-164.

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Official URL: http://stacks.iop.org/1742-6596/26/161

Abstract

Core EEL spectra of MWCNTs (multi-wall carbon nanotubes) grown in a nitrogen atmosphere were acquired utilising a dedicated STEM equipped with a Gatan Enfina system. Splitting of the carbon K-edge p* resonance into two peaks provided evidence of two nondegenerate carbon bonding states. In order to confirm the presence of a CNx bonding state, a full-potential linearised augmented plane-wave method was utilised to simulate core EEL spectra of graphite and graphitic-CNx compounds. The simulations confirmed splitting of the carbon K-edge p* resonance in graphitic-CNx materials, with the pristine graphite p* resonance remaining unsplit. The simulations also confirmed the increasing degree of amorphicity with higher concentrations (25%) of substitutional nitrogen in graphite.

Item Type:Article
ID Code:5424
Deposited By:Prof. Alexey Ivanov
Deposited On:06 Feb 2010 11:11
Last Modified:06 Feb 2010 11:53

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