Gold, silver and platinum nanoparticles biosynthesized using orange peel extract

Nowadays, metal nanoparticles have attracted a great scientific interest due to their unique optoelectronic and physicochemical properties with applications in diverse areas such as molecular diagnostics and drug delivery, electronics, catalysis or sensing. The development of techniques for the controlled synthesis of nanoparticles of well defined size, shape and composition has become a big challenge. Development of reliable and eco-friendly processes for synthesis of metallic nanoparticles is an important step in the field of applied nanotechnology. The use of biological systems as factories to produce nanoparticles is one way to achieve this objective. This study reports the synthesis of different metallic nanoparticles (gold, silver and platinum) through reduction of metal precursors by the extract of orange peel. It also demonstrates that particle size and shape could be controlled by varying parameters such as pH.