Fig. 5From: Graphene oxide as a protein matrix: influence on protein biophysical propertiesHigh-resolution X-ray photoelectron spectroscopy of N 1s1/2 (a) and S 2p1/2 (b) binding energy region acquired from dextran and dextran activated with sulfo-NHS. All spectra were background corrected and vertically displaced for ease of visualizationBack to article page