In the semiconductor industry scientists take advantage of diffusion to “dope” or introduce atoms into a silicon wafer to change its conductive properties. The lesson simulates the diffusion of a gas phase substance (ammonia) into a solid substrate (gelatin) and compares the lab model of diffusion to the doping process of silicon wafers. Students will examine how diffusion occurs and explore how the electrical properties of semiconductors are developed. This lesson uses only commonly available substances.
“Nanotube Models” is a facilitated tabletop program aimed at educating the public about the properties and applications of carbon nanotubes. Visitors will be able to use Molecular Visions model kits to build carbon nanotubes. The models can be started by museum staff and added onto by visitors, or pre-built to be used as a display. The models can also be accompanied by other NISE Net programs that focus on carbon nanotubes to increase the engagement and enhance the models.