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The corresponding authors regret the reproduction of text from an article that appeared in Applied Physics Letters (S. Ghosh, B. K. Sarker, A. Chunder, Lei Zhai, S. I. Khondaker, Appl. Phys. Lett.2010, 96, 163109) in their paper.

The corresponding authors sincerely apologize to the readers, reviewers, and editors for this oversight and for any miscommunication.