I noticed this instructable [
www.instructables.com] which describes making a putty whose conductivity varies with pressure by mixing graphene into it.
Now, the putty itself isn't that interesting for 3D printing (IMHO), and graphene powder is expensive ($2-$400/gram), but I wonder whether there's an application of this new wonder-product?
Google also found this paper on a graphene-based piezo pressure sensor: [
www.scribd.com]
I'm thinking that something like this [
www.aliexpress.com] might vary its resistance with tiny amounts of bending or compression?
Has anyone else looked into this?