D. Gopi*ab,
N. Murugana,
S. Ramyaa,
E. Shinyjoya and
L. Kavithac
aDepartment of Chemistry, Periyar University, Salem 636 011, Tamilnadu, India. E-mail: dhanaraj_gopi@yahoo.com; Fax: +91 427 2345124; Tel: +91 427 2345766
bCentre for Nanoscience and Nanotechnology, Periyar University, Salem 636 011, Taminadu, India
cDepartment of Physics, School of Basic and Applied Sciences, Central University of Tamilnadu, Thiruvarur 610 101, Tamilnadu, India
First published on 29th March 2023
Retraction of ‘Ball flower like manganese, strontium substituted hydroxyapatite/cerium oxide dual coatings on the AZ91 Mg alloy with improved bioactive and corrosion resistance properties for implant applications' by D. Gopi et al., RSC Adv., 2015, 5, 27402–27411, DOI: https://doi.org/10.1039/C5RA03432A.
The optical images presented in Fig. 6a and c are identical. Furthermore, the images in Fig. 6a, c and e have been duplicated in other publications. The panels in Fig. 6a and c have been duplicated as Fig. 9a in ref. 1, and as Fig. 8a in ref. 2. The panel in Fig. 6e has been duplicated as Fig. 9b in ref. 1, and as Fig. 8b in ref. 2.
Part of the image in Fig. 10c has been duplicated in Fig. 10e.
The authors informed the Editor that the characterization of the original samples was outsourced, and they do not have the original raw data for the published results.
Given the significance of the concerns about the validity of the data, and the lack of raw data, the findings presented in this paper are not reliable.
N. Murugan was contacted but did not respond.
Signed: D. Gopi, S. Ramya, E. Shinyjoy and L. Kavitha
Date: 16th March 2023
Retraction endorsed by Laura Fisher, Executive Editor, RSC Advances
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