Abstract
Microplasmas are a special class of electrical discharges formed in geometries where at least one dimension is less than 1 mm. As a result of their unique scaling, microplasmas operate stably at atmospheric pressure and contain large concentrations of energetic electrons (1-10 eV). These properties are attractive for a range of nanomaterials synthesis including metal and semiconductor nanoparticles, nanocarbons, and metal/semiconductor heteronanostrutures. Recently, we found that the energetic species including radicals, ions and electrons generated in the microplasmas were capable of initiating electrochemical-assisted reactions for the nucleation and growth of nanographenes. Moreover we develop a simple synthesis of silver (Ag) nanoparticles (NPs)/nanographene nanoheterostructures using a unique atmospheric-pressure microplasma-assisted electrochemical method. The systematic micro Raman study indicates that the synthesized AgNP/nanographene composites process superior plasmonic properties. In this presentation, I will discuss these topics in detail, highlighting the advantages of microplasma-based systems for the synthesis of well-defined nanographenes and nanoheterostrutures. These experiments will aid in the rational design and fabrication of nanomaterials and may also have significant impact in emerging applications.
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