Hi I've made what I think is graphene. I first put the solution on cardboard and then I put some on polyethylene. When they had dried, I tested conductivity with a digital multimeter with the scale set on megaohms. The cardboard was nonconducting, but the sample on poly to my astonishment showed a negative resistance. I touched the 2 probes together and they read zero, touched them back to the poly sample and again got anegative resistance. Since I am confident that thermodynamic laws are fully universal on all scales governing all energy interactions from solar concentrators to theoretical maxwell demons involving measuring quantum states, there has to be a conservative explanation. Is it some sort of capacitive effect?