Self-Assembly Influenced by Geometrical Orientation of Nanosheet in Layered Nanoparticles

Abstract

An influence of geometrical orientation of two-dimensional (2D) nanosheets on long-term rheological self-assembly with the aid of H 2 O molecules is investigated by positronium lifetime spectroscopy. It is found that self-assembly is accelerated for the well self-assembled sample due to in-plane ordering of 2D nanosheets. The acceleration of self-assembly is further enhanced for the sample prepared by uniaxial pressure compaction owing to stacking of 2D nanosheets with a highly ordered state. The present results evidence that self-assembly is significantly influenced by local geometrical orientation of 2D nanosheets in layered nanoparticles.