Retraction: Zhong H,Lu L,Wang Y,Yang H. Single layer molybdenum disulfide as an optical nanoprobe for 2 photon luminescence and second harmonic generation cell imaging. J. Biophotonics. 2018;11:e201700354.

The above article from the Journal of Biophotonics, published online on 9 January 2018 in Wiley Online Library as Early View ( https://onlinelibrary.wiley.com/doi/abs/10.1002/jbio.201700354 ), and in Volume 11, e201700354, has been retracted by agreement between the authors (Hong Zhong, Lin Lu, Yuanhao Wang, Hongxing Yang), Prof. Sailing He, Prof. Jurgen Popp (Editor‐in‐Chief) and Wiley‐VCH GmbH & Co. KGaA. The retraction has been agreed because the submitting author Hong Zhong failed to acknowledge the true authorship of the presented study which was originally conducted by a group led by Prof. Sailing He in South China Normal University, Guangzhou of China. REFERENCE Zhong H, Lu L, Wang Y, Yang H. Single layer molybdenum disulfide as an optical nanoprobe for 2 photon luminescence and second harmonic generation cell imaging. J. Biophotonics  2018 ;11:e201700354. https://doi.org/10.1002/jbio.201700354