INTERFACIAL SOLID-STATE PROCESS CONTROL FOR MICRO- AND NANOCOMPOSITES

Mamoru SENNA
Faculty of Science and Technology, Keio University, Yokohama, Japan

Significance of controlling interfacial processes for affordable fabrication of smart composite materials is overviewed. One of the key issues is charge transfer across the boundary of dissimilar solid particles that takes place at room temperature under open air. Charge transfer processes are accelerated by enhanced polarization and structural anomaly at near-interface region. These two factors interplay with each other when a solid mixture is subjected to mechanical stressing. Optimization of operation conditions is best done by choosing appropriate combination of starting species and use of moderate mechanical stressing. Case studies, based on the recent experimental works in the author’s own laboratory, will cover electroceramic composite oxides, apatite-based bioaffinitive nanocomposites, organic syntheses by a solid-state Diels-Alder reaction, and drug-excipient complexes. Discussion is mostly based on physicochemical viewpoints at solid interfaces. Application for industry is referred by taking a balance between product quality and green chemical processing.