The authors of Nanoscale Research Letters 2015, 10:32 (DOI 10.1186/s11671-014-0724-z) [1] omitted to acknowledge that all ellipsometric data discussed in the article, including those displayed in Figure 1, were recorded in the laboratory of the Semiconductor Physics Group, Institut für Experimentelle Physik, Universitāt Leipzig, with the active involvement and under the guidance of Tammo Böntgen, Rüdiger Schmidt-Grund, and Marius Grundmann.