We measure the Raman spectrum on the Wintec Apyron Raman spectrometer using a 532 nm laser source excitation and 50× (0.55 NA) objective (1800 g/mm grating; 10 mW laser power; accumulation times: 50). We perform the X-ray photoelectron spectroscopy (XPS) measurements on the Kratos AXIS Supra system employing a monochromatic Al Kα X-ray source (hv = 1486.6 eV).