Preparação de nanopartículas coloidais de ouro em óleo de mamona e a influência das condições de síntese no tamanho e na morfologia das partículas obtidas

Abstract

In this work was accomplished a systematic study of the physical and chemical properties of a system containing gold nanoparticles dispersed in organic and biocompatible medium (castor oil), applicable in catalysis, optics, spectroscopy, and biotechnology. Its properties are controlled by inductor nucleation agent, its concentrations and acidity of the medium changes. As a result, we obtained a fairly stable system, controlled and consolidated synthesis method. Thus, we can obtain particles with different sizes and morphology, can produce nanospheres with 10 nm and nanostars with 200 nm. Has been found that these systems exhibit activity in nonlinear optics and the intensification signal in the Raman spectrum by Surface Enhanced Raman Scattering (SERS).