Retraction Note to: J Nanobiotechnol (2018) 16:83https://doi.org/10.1186/s12951-018–0409-3

The authors have retracted this article [1] because of an error in the methodology. Recently, the authors have tested the Cu2MnS2 nanoparticles used in their study by XRD, XPS and TEM mapping and have found that the manganese element was not successfully doped. The composition of the nanoparticles was therefore CuS, not Cu2MnS2 as reported in the article. All authors agree to this retraction.