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An apparatus available for metastable-atom electron emission microscopy (MEEM) and photoelectron emission microscopy (PEEM) was constructed for the present study, based on our electron trajectory simulations. In MEEM, information on the local electronic states at the topmost layer is selectively obtained. The mesoscopic (μm-scale) images during initial oxidation of Ni(111) at temperature of 300–700K...
The initial oxidation of Ni(111) in the temperature range of 550–700K has been monitored by photoelectron emission microscopy (PEEM) and metastable-atom electron emission microscopy (MEEM). The PEEM and MEEM images show uniform patterns for the chemisorbed overlayer, reflecting the electronic homogeneity as seen at the μm scale. During the nucleation and lateral growth of oxide, however, the μm-scale...
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