Dispersion of metallofullerene Y@C-82 on bare, C-60-modified, and iodine-modified Au(111) surfaces investigated with ECSTM

摘要

Two-dimensional (2D) assembling behaviors of the endohedral metallofullerene Y@C-82 on bare, C-60-modified, and iodine-modified Au(111) surfaces have been investigated in 0.1 M HClO4 Solution employing electrochemical scanning tunneling microscopy (ECSTM). The results show that Y@C-82 molecules are mobile and aggregate to the terrace edges oil bare and C-60-modified Au(111) surfaces, but monodispersion of the Y@C-82 molecules is achieved on the iodine-modified Au(111) surface. The improvement of Y@C-82 dispersion on an iodine-modified gold surface is due to the strong Y@C-82-substrate interactions. The modified-substrate method provides all effective strategy to disperse endohedral metallofullerenes.