Nanotecnologia aplicada à eletrônica

Abstract

Nanotechnology has been expanded to several fields of knowledge, one of which is electronics. With the current race for smaller and more efficient systems, the use of nanoparticles become an important tool for the optimization of size, performance and cost of printed circuits. Metal nanoparticles can be synthetized to improve their physical and chemical attributes, assisting in a wide variety of applications, such as the conductive inks used in flexible electronics. Currently, those inks are fabricated with high conductivity metals, like silver (Ag) and gold (Au), that have a high fabrication cost. The substitution for ordinary metals like copper (Cu), can bring improvements, but copper conductive inks are of low conductivity and flexibility, moreover it oxidizes with ease in ambient atmosphere. For this paper, Cu and iron (Fe) nanoparticles were synthesized to be mixed with several materials, like polymers, to conduct electricity and acquire flexibility. The results achieved resistances in the semiconductor range when mixed with insulating polymers, and decreased the resistence of conductors when mixed with solid conductors. The produced samples also exhibited electrical potential through the photovoltaic effect, enabling photovoltaic generation in materials that previously did not possess this characteristic.