Figure 3.

TM 2p core level XPS spectra for TM-doped TiO2 thin films. High-resolution XPS spectra of Ni 2p(a), Fe 2p(b), and Co 2p(c) core level for TM-doped TiO2 films. Experimental and fitted XPS spectra of Ni 2p(d), Fe 2p(e), and Co 2p(f) core level for Ti0.97TM0.03O2 films.

Tian et al. Nanoscale Research Letters 2013 8:533   doi:10.1186/1556-276X-8-533
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