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. 2015 Nov 30;5:17399. doi: 10.1038/srep17399

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Representative FE-SEM images of the samples treated hydrothermally at 120 °C for (a,b) 8 h and (c,d) 12 h at a pH of 12 and (e) 120 °C for 12 h in DI Water; (f) EDS spectrum acquired from different areas on sample (e): (f1) Flat and (f2) Flower-like zones.