Figure 4
From: Laser Engineered Graphene Paper for Mass Spectrometry Imaging
Matrix-free LDI MS detection and imaging of molecules.
MS spectra of 8.5 fmol AONB on (a) commercial NALDITM substrate and (b) engineered graphene paper. MS spectra of 300 fmol DOTAP on (c) untreated graphene paper and (d) engineered graphene paper. MS imaging patterns of a letter ‘N’ at m/z of 662 and 380 on (e, f) untreated graphene paper and (g, h) engineered graphene paper, respectively. Asterisks indicate the identified ions from the target molecules. The scale bar in e–h is 500 μm.
