Light Emitting Diode Irradiation Can Control the Morphology and Optical Properties of Silver Nanoparticles

摘要

A facile method for the preparation of silver nanoparticles (AgNPs) of various sizes and morphologies, including dodecahedra, nanorods, and nanoplates, has been discovered. We describe a photochemical synthesis of citrate mildly stabilized spherical AgNPs that can in turn be used to prepare multiple nanostructures with predictable and controllable size and morphology through irradiation with inexpensive narrow band LEDs. We also describe a common mechanism for the formation of the various types of AgNP. The changes in morphology also result in dramatic spectroscopic changes, as illustrated in Figure 1.