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. Author manuscript; available in PMC: 2012 May 18.
Published in final edited form as: J Am Chem Soc. 2011 Apr 27;133(19):7450–7460. doi: 10.1021/ja111687t

Figure 2.

Figure 2

X-ray photoelectron spectroscopy (XPS) spectra of polyetheretherketone (PEEK) and sulfonated PEEK (SPEEK). (A) Wide scan survey spectrum. (B, C) C1s spectra of PEEK and SPEEK. (D, E) O1s spectra of PEEK and SPEEK.