Estudos sobre interação entre nanopartículas de ouro para o desenvolvimento de nanoestruturas planejadas geradas por automontagem

Abstract

Gold nanoparticles have been used as new materials due to their electronic, optical, thermal, catalytic properties, as well as their applications in various branches of science. When nanoparticles interact with each other, new properties are generated when compared to the properties of individual particles. The self-assembly process using gold nanoparticles as a basic component is still a paradigm in nanotechnology, although these processes are used to organize and transform nanomaterials into functional architectures for a specific purpose. The main objective of this work was to synthesize gold nanoparticles with different geometries and sizes, and to use them as a building block in the development through self-assembly processes. Initially, studies were carried out to determine the concentration of ligands (mercaptoacetic acid - AMA and cysteamine - CYS) for the functionalization of nanoparticles. Second, interaction studies - called systems - were carried out between the functionalized nanoparticles in order to obtain the nanostructures. In view of the results, it was noticed that there is interaction between functionalized nanoparticles, however, this action is neither controlled nor organized. Some factors can be evaluated in the future, for example, the size of the binders, the size of the building blocks or the environment in which the systems occurred. Thus, the study of new routes or chemical strategies to control the self-assembly of gold nanoparticles in aqueous medium is of fundamental importance.