Preliminary study on oligoaniline/silica composite nano-particles as a high density information storage material

An access to an increase in the information storage capacity is to reduce m emory units to a nano-scale. Therefore, we used carboxylized phenyl-capped polyaniline tetramer (PCAT) as the functional component and silica as the c arrier to prepare PCAT/silica composite nano-particles (phi: 60 nm) with a structure of core-shell. The functionalized particles were two-dimensionall y arrayed on substrates such as silicon, glass and ITO glass at pH 3, SEM a nd AFM results proved the arraying regularity of these particles under any given conditions, and the electrostatic force microscopy showed their respo nse to +3 V bias applied.