| abstract |
Surface-coated aluminum oxide nanoparticles which can be evenly incorporated into a polycarbonate resin in a satisfactorily dispersed state while keeping the molecular weight of the resin on at least a specific level. These surface-coated aluminum oxide nanoparticles each has been surface-coated with a dispersant and a silylating agent. When a sample surface is irradiated with a monochromatized Al-Kα line using an X-ray photoelectron spectroscope and surface element proportions are calculated from the areas of the resultant photoelectron peaks, then the contents (atm%) of nitrogen atoms, sulfur atoms derived from thiol groups, and halogen atoms are 2 or lower each. When surface element proportions are calculated from the areas of the resultant photoelectron peaks attributable to Al2p and Si2s, the concentration of silicon atoms (mol%) is 0.05-30 based on the aluminum atoms. |