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Background With gold nanoparticles (AuNPs) is possible to develop nanoscale devices that can interact with chemical and biological systems. The phenomenon explored in these nanosystems is called Localized Surface Plasmon Resonance (LSPR), which promotes electromagnetic wave oscillation electronics on these small metallic structures. It is interesting to note that this resonance is directly linked to the size of the nanoparticles, the nature of the dielectric material and support environment where the device is being studied [1,2]. This work makes a comparison between results obtained in the synthesis of AuNP’s reduction method using a Sodium Citrate (Na3C6H5O7) and Sodium Borohydride (NaBH4). Was expected to demonstrate the viability of these two reducing agents and highlight the potential differences obtained in each of the mechanisms. Since knowledge is the ability of stabilizing citrate ions and the strong reducing action of NaBH4 [3]. The dominance of this knowledge will provide the development of systems with particle size specific for various applications in biosensors.

Comparison between the synthesis of gold nanoparticles with sodium citrate and sodium tetraboreto