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The recent rise of van der Waals (vdW) crystals has opened new prospects forstudying versatile and exotic fundamental physics with future deviceapplications such as twistronics. Even though the recent development onAngle-resolved photoemission spectroscopy (ARPES) with Nano-focusing optics,making clean surfaces and interfaces of chemically transferred crystals havebeen challenging to obtain high-resolution ARPES spectra. Here, we show that byemploying nano-ARPES with submicron sized beam and polystyrene-assistedtransfer followed by annealing process in ultra-high vacuum environment,remarkably clear ARPES spectral features such as spin-orbit splitting and bandrenormalization of CVD-grown, monolayered MoS2 can be measured. Our findingpaves a way to exploit chemically transferred crystals for measuringhigh-resolution ARPES spectra to observe exotic quasi-particles in vdWheterostructures.

Spectral functions of CVD grown MoS$_2$ monolayers after chemical transfer onto Au surface