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. 2015 Oct 13;5:15113. doi: 10.1038/srep15113

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(A) AFM image of GO on the freshly cleaved mica; (B,C) typical TEM images of (B) GO and (C) PtNPs/CoTPP/rGO, (C) XPS spectra of GO, CoTPP/GO and PtNPs/CoTPP/rGO; (E) photographs of (left) PtNPs/CoTPP/rGO and (right) rGO after storing for three months at room temperature, respectively; (F) FTIR spectra of (a) CoTPP, (b) PtNPs/CoTPP/rGO, (c) CoTPP/GO and (d) GO; (G) UV-vis absorption spectra of (a) CoTPP/GO, (b) PtNPs/CoTPP/rGO, (c) GO and (d) rGO (Inset: the corresponding CoTPP); and (H) Raman spectra of GO, CoTPP/GO and PtNPs/CoTPP/rGO.