Size and Shape Control of Colloidal Aluminum Nanocrystals for UV Plasmonics Applications
McClain, Michael J
Halas, Naomi J
Doctor of Philosophy
Metallic nanocrystals show tremendous promise in photocatalysis, distillation, and chemical sensing applications. This is due to their nique optical properties that arise from the collective oscillation of the conduction electroncs known as the plasmon resonance. However, most nanocrystal research is on noble metals such as gold or silver which have issues for larger scale applications because of their cost and intrinsic properties. For example, gold works well for visible and near-IR applications but cannot support an ultraviolet plasmon resonance due to interband transitions. The UV region is of great interest for many applications including ultrasensitive detection of organic molecules, photocatalysis, sterilization, and remediation. While silver can support a UV plasmon resonance it is prone to complete oxidation. In this thesis, I demonstrate size and shape control of colloidal aluminum nanocrystals.
Nanoparticle synthesis; nanocrystal; aluminum; plasmonics; aluminum hydride