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. Author manuscript; available in PMC: 2016 Feb 15.
Published in final edited form as: Biosens Bioelectron. 2014 Sep 3;64:138–146. doi: 10.1016/j.bios.2014.08.072

Figure 2.

Figure 2

XPS high resolution S2p, C1s, N1s, O1s spectra for each immobilization step of the biosensor assembly: bare Pt (solid line), 4-ATP (dotted line), SWCNT (small dashed line), SWCNT with EDC/Sulfo-NHS linker (dotted-dashed line), and LOx (large dashed line).