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\bibitem{Deng_etal2014} {\textquotedblleft}\textit{Controllable nitrogen doping in as deposited TiO$_{2}$ film and its effect on post deposition annealing}{\textquotedblright}. Deng S, Verbruggen SW, Lenaerts S, Martens JA, Van den Berghe S, Devloo-Casier K, Devulder W, Dendoover J, Deduytsche D, Detavernier C, Journal of vacuum science and technology: A: vacuum surfaces and films \textbf{32}, 01a123 (2014).   http://doi.org/10.1116/1.4847976

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