Rick, I don't know about the graphene side of things, but as an fyi, the carbon nanotubes leverage an SOI wafer -- I wrote about this in ASN a couple years ago. IBM "fabricated trenches made of hafnium oxide onto SOI wafers, which allows the self-assembly by the carbon nanotubes into neat rows rather than a spaghetti-like tangle." (see http://bit.ly/XPEFXc)
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.