"Figure 3: ... (C) Magnetic hysteresis loops of (1) r-GO, (2) silane@Fe3O4, (3) r-GO/silane@Fe3O4, (4) r-GO dendrite."
Please compare with (for instance) Roy et al. (2016), Figure 4(A), https://pubpeer.com/publications/D096039321B5BB3C3EF32D8496C081
or Roy et al, (2017), Figure 3(C), https://pubpeer.com/publications/33CB940D42723BAB8B4F737B434E86#5
With a free copy at Unipune: http://ugcdskpdf.unipune.ernet.in/Journal/uploads/CH/CH12-130084-A-1.pdf
It is also evident in Figure 3 that aside from the control (E) all of the other plates have patterns of cracks typical of dried-out agar. They were also photographed against a different backdrop. The corresponding author is invited to explain these anomalies for a fairly recently-published paper.
"This article has been retracted at the request of the Editor-in-Chief following concerns raised by a reader.
The article uses an electron micrograph identical to another publication despite being labelled as different samples. Fig. 3F is the same as Fig. 1D published in Biosensors and Bioelectronics Volume 89 Part1, 15 March 2017, Pages 620-626, 10.1016/j.bios.2015.12.085.
In addition, the extraordinary similarities observed between the data presented in Fig. 3C and in Fig. 3C in ACS Biomater. Sci. Eng., 2017, 3 (9), pp 2120–2135, 10.1021/acsbiomaterials.7b00089, Fig. 4A in Colloids and Surfaces B: Biointerfaces, Volume 142, 1 June 2016, Pages 248-258 10.1016/j.colsurfb.2016.02.053 and Fig. 4C in Biosensors and Bioelectronics, Volume 97, 15 November 2017, Pages 208-217, 10.1016/j.bios.2017.06.003 are highly unlikely.
This problem with the data casts doubt on all the data, and accordingly also the conclusions based on that data, in this publication."
https://www.sciencedirect.com/science/article/pii/S0956566315000901
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