Recently, there have been some great questions pertaining to monomolecular blades and filaments, so I wanted to ask two very essential questions. If we can't definitively answer these, we can never make such a tool.

1. Could you see it with the naked eye, assuming 1 molecule by 1 meter by 2 cm, made of a typically visible solid element or compound?
2. What could you make it from, assuming our current non-theoretical knowledge of elements and alloys, in order to last the longest?