Figure 6.

XPS spectra of the FT-1, FT-2, and FT-3. XPS spectra for FT-1 (curve a), FT-2 (curve b), and FT-3 (curve c) comparison (a), the regions for C 1s (b), O 1s (c), N 1s (d), Si 2p (e), Fe 2p (f), and Ti 2p (g), comparison respectively.

Wu et al. Nanoscale Research Letters 2011 6:533   doi:10.1186/1556-276X-6-533
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