Low-dimensional Metallic Materials At Room Temperature Liquid Phase Synthesis And Optical Properties

The aim of this dissertation is to explore some room-temperature, template-free and solution-phase routine to prepare anisotropic metal nanostructures. The mechanism for anisotropic growth of metal nanostructures is discussed, and their optical properties are investigated. Chapter one includes a brief introduction of the properties and applications of metal nanomaterials, and a summary of recent research activities on the topic of morphology control of metal nanostructures. The following three chapters introduce some novel wet-chemical methods for the synthesis of anisotropic metal nanostructures, and their optical properties.1. Silver nanoplates were prepared through a visible light induced reduction process in the aqueous solvent. The main products showed polygonal morphologies, and a large proportion of them were triangular or truncated triangular nanostructures. Their UV-Visibe absorption spectrum showed three peaks, corresponding to the out-of-plane quadrupole, in-plane quadrupole and in-plane dipole plasmon resonance modes of triangular nanoplates, respectively. The tendency of shape evolution from polygon toward triangle of the nanoplates was observed, and the highest reactive activity of the short side surface of the polygon...