Design & Material Characterization for 3D Printing Sensor

Abstract: 3D printing requires constant innovation in materials for wider utilization. Sensor size impacts fabrication in a larger aspect and for printing the sensors effectively. Sensor performance measures include size, resolution, aspect ratio and response time. Speed has a tradeoff for resolution. The use of nano materials to develop electrochemical sensors has attracted growing interest in recent times. Enhanced chemical, physical, mechanical and electrical properties of nano materials coupled with the right technology make the sensing devices more efficient for key applications. The materials for 3D printed nano porous gold electrochemical sensor are analyzed and characterized. The nano porous gold film is fabricated by immersing copper in and chemically reacting with potassium gold cyanide solution at around 700C. The crude resistance value of copper prior to the chemical reaction is 0.94O. The resistance of the nanoporous gold film_x000D_ is 0.15O, 2 minutes after immersion in the potassium gold cyanide solution; the resistance does not change significantly after 6 hours of immersion. The porosity of the nano porous gold film is observed in a microscope to be 0.24% after 2 minutes of immersion. The porosity does not change with time during the process. The characterization of results is provided after experimentation.