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[21a-432-12] Ionization energy of individual TiO2 nanoparticles observed by PEEM
Keywords:TiO2, ionization energy, individual nano particle
We are observing electronic states of individual NPs using a photoemission electron microscope (PEEM) having a spatial resolution of 40-nm with a pump and probe method using a fs laser.
We found 20 % of NPs have a lager ionization energy by about 0.2 eV than others. This difference may be caused by different density of defects or different facet or by other reasons causing a change of work function.
We found 20 % of NPs have a lager ionization energy by about 0.2 eV than others. This difference may be caused by different density of defects or different facet or by other reasons causing a change of work function.