%&LaTeX
\documentclass{article}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{textcomp}

\begin{document}

\begin{thebibliography}{1}

\bibitem{Felten_etal2010} {\textquotedblleft}\textit{Measuring point defect density in individual carbon nanotubes using polarization-dependent X-ray microscopy}{\textquotedblright}. Felten A, Gillon X, Gulas M, Pireaux J-J, Ke X, Van Tendeloo G, Bittencourt C, Najafi E, Hitchcock AP, ACS nano \textbf{4}, 4431 (2010).   http://doi.org/10.1021/nn1002248

\end{thebibliography}

\end{document}

