Here’s the notice for “Sonochemical synthesis of poly(methyl methacrylate) core–surfactin shell nanoparticles for recyclable removal of heavy metal ions and its cytotoxicity” (freely available but requires sign-in):
We, the named authors, hereby wholly retract this RSC Advances article (RSC Adv., 2014, 4, 24991–25004) in order to maintain the accuracy of the scientific record. Upon repetition of the synthesis procedure, characterisation and subsequent heavy metal absorption studies, we found that the material used in the original study was not reproducible.
We, the authors, apologise for any inconvenience caused due to this inadvertent error.
Signed: Debasree Kundu, Chinmay Hazra, Aniruddha Chatterjee, Ambalal Chaudhari and Satyendra Mishra, 15th October 2014.
The study has yet to be cited, according to Thomson Scientific’s Web of Knowledge.
RSC sent us a form comment indicating they retracted the paper in accordance with COPE guidelines. We reached out to the authors, and will update with anything we learn.
Hat tip: Rolf Degen