Fig. 5From: Detection of pH and Enzyme-Free H2O2 Sensing Mechanism by Using GdO x Membrane in Electrolyte-Insulator-Semiconductor Structure a TEM image for EELS spectra of the S3 membranes. The edges of b Gd and c O-K are plotted for the P 1 and P 2 regions marked on a. The polycrystalline grain corresponds to Gd2+ and the grain boundary corresponds to Gd3+ oxidation statesBack to article page