Fabrication And Properties Of Ordered Metal Nanoparticle Structure

Surface plasmon resonance is a unique property on metallic nanostructures. Surface plasmon resonance based on Nanostructured system, namely plasmonic optics, becomes one of the focused fields. It contains many research areas: enhanced local field, enhanced emission, enhanced transmission; plasmon waveguide; plasmon photocatalyse; plasmon enhanced energy transfer and selected absorption. Many new phenomena and questions have been found during the research process and many potential applications have been proposed,such as ultrahigh sensitive detection and new kind of sensor based on the enhanced spectra.In our work. Plasmonic nanostructures have been fabricated successfully and its electrochemical property, surface enhanced Ramon scattering and metal enhanced fluoresce o were studied for plasmonc application.1. A simple method of controlling gold nanoparticle shapes by dynamic process was proposed and the mechanismof morphological evolution process was also presented. It is an alternative route for synthesis nanoparticle with different shape control. This is the first report on the dynamic process control on the shape of nanoparticles. It is a kind of"green chemistry"method to synthesize the gold nanoparticles. The electrochemical properties and optical properties of the gold nanoparticles with different shapes are studied. 2. A nonel method of fabricating the arrays of silver nanoparticles (SNPs) on predefined positions by electrochemical deposition (ECD) combined with nanoimprint lithography (NIL). The SNPs assemble, especially the density, can be controlled by varying the pattern design and the preparation conditions. By this approach, various arrays of SNPs with feature size down to sub-micrometer can be fabricated over several square centimeters on one substrate. In this thesis, the density tunable properties are systematically studied and reviewed the inner reason. The SNPs arrays can be applied in detecting and sensing fields and surface-enhanced Raman scatter and metal enhance fluoresce are carefully studied and gained good results.Herein we originally demonstrated the methods for fabricating surface plasmon resonance nanostructures. These methods make the Surface plasmon resonance property application in the field of nanoparticle and nanoparticle arrays areas. This may allow a novel and simple route to fabricate large-area surface plasmon resonance materials. Comparing with traditional methods, the low cost is the basement for the Surface plasmon resonance property widely application.