Synchrotron radiation photoelectron spectroscopy studies of self-organization in As40Se60 nanolayers stored under ambient conditions and after laser irradiation

► Stoichiometry changes of As40Se60 nanolayers under air and/or light exposure ► Effect of the ambient condition on the structure of As40Se60 surface nanolayers ► Transformation of As40Se60 surface nanolayers under near bandgap illumination ► Surface sensitive synchrotron radiation photoelectron spectroscopy experiments ► Atomic model of induced structural changes on the As40Se60 surface