Table of Contents
Journal of Nanoscience
Volume 2015, Article ID 282967, 6 pages
http://dx.doi.org/10.1155/2015/282967
Research Article

Nickel-Silicon Related Color Center Formed in Nanodiamond Grains under CVD Growth

Institute for Solid State Physics and Optics, Wigner Research Center for Physics, Hungarian Academy of Sciences, P.O. Box 49, Budapest 1525, Hungary

Received 27 August 2015; Revised 5 December 2015; Accepted 6 December 2015

Academic Editor: Zhengjun Zhang

Copyright © 2015 Sára Tóth 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

Formation of optical centers in nanodiamond grains with narrow, near-infrared emission at room temperature is one of the most important challenges nowadays. Our aim was to form a metal-related color center through the CVD growth process of nanodiamond. Previously undocumented photoluminescence (PL) system with 865 nm zero-phonon line (ZPL) and 2 nm full width at half maximum (FWHM) was successfully created in nanodiamond grains. According to the detailed analysis of the spectral features of the ZPL and quasilocal modes of the vibronic sideband, a complex center containing Ni and Si atoms could be accounted for these PL features. The inclusion of Ni and Si impurity atoms in the complex optical center was strengthened by micro-Raman spectroscopy performed in the frequency range due to quasilocal vibrations of the vibronic sideband.