Table of Contents
ISRN Nanomaterials
Volume 2013, Article ID 940545, 6 pages
http://dx.doi.org/10.1155/2013/940545
Research Article

X-Ray Spectral Investigation of Carbon Nanocapsule and Graphite Nanosheet Electronic Structures

1Frantsevich Institute for Problems of Materials Science, 3 Krzhyzhanivsky Street, Kyiv 03680, Ukraine
2Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Sendai 980-8577, Japan
3Physico-Technological Institute of Metals and Alloys NAS of Ukraine, 34/1 Vernadsky Avenue, Kyiv 142, Kyiv 03680, Ukraine
4National Technical University of Ukraine “Kyiv Polytechnic Institute”, Engineering-Physical Faculty, 35 Polytekchnichna Street, Kyiv 03056, Ukraine

Received 5 June 2013; Accepted 9 July 2013

Academic Editors: J. Bai, A. Fidalgo, A. Kajbafvala, and A. Pyatenko

Copyright © 2013 Bogdan Ilkiv et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Ultrasoft X-ray emission spectroscopy (USXES) was used to investigate the electronic structures of FePt alloy included carbon nanocapsules (FePt@CNCs) and graphite nanosheets (GNSs). These materials were synthesized by electric plasma discharge in an ultrasonic cavitation field of liquid ethanol. Scanning and transmission electron microscopies were used to study the spatial structures and morphologies. The electronic structure of GNSs was compared with that of reference synthetic graphite powder and high surface area reduced graphene oxide (RGO) sheets with an average thickness of one graphene layer. Investigations of the electronic structures of the FePt@CNC and GNS mixture and GNSs obtained after magnetic separation of the mixture revealed that GNS graphene layers exhibited a smaller curvature than those of carbon nanocapsules, which widened the -subband of GNSs due to overlapping of the orbitals. Thicker GNSs had a narrower CKα emission band than RGO sheets, which was related to the greater overlapping of and orbitals in the more crumpled and corrugated RGO sheets.