Figure 2
From: Room temperature Co-doped manganite/graphene sensor operating at high pulsed magnetic fields
(a) Photoemission spectra of C 1 s region for the detection of PMMA polymer residuals in single- (SLG) few- (3LG, 5LG) layer graphene, after transfer process. The main synthetic component 1 is attributed to C−C bond in graphene; 2,3,4 components – to carbon bonds (−C−O, −C=O and −COOH) on the surface contamination including the residuals of PMMA polymer. (b) First derivative of XAES spectra of C KVV region for the samples SLG, 3LG, 5LG in order to prove existence of graphene in few-layer graphene samples. The AES spectrum of C KVV for the sample 5LG is also included.
