Data repository for authors correction to Vecera et al. "Precise determination of graphene functionalization by in situ Raman spectroscopy" [Nat. Comm. 8, 15192 (2017)]

The Raman spectra were taken on KC8 in-situ inside a flat quartz tube of ~0.7 mm thickness of borosilicate glass (PGO GmbH) under ultra-high vacuum conditions at ∼4 × 10^{−8} mbar. The material was exposed to vapors of H2O, O2, or H2. Each measured spectra was performed with a minute of difference at maximum trying to keep the same focal distance and spot location while the chemical reaction of K-doped graphene was taking place live in real time with: water, hydrogen or oxygen in a sample boat. The Raman measurements were performed at room temperature using a HORIBA LabRam spectrometer with a 514 nm excitation wavelength and between 300 and 3,000 cm^{−1}. To avoid laser-induced deintercalation and photochemistry, the laser power was kept below 0.5 mW.