What is the smallest machine or structure that graphene nanosheets can be used for?

Question: What is the smallest machine or structure that graphene nanosheets can be used for?
- Keywords:
  graphene nanosheets,
  technology
Asked by willeddershaw to Arlene on 13 Nov 2012.
- Arlene O'Neill answered on 13 Nov 2012:
  
  Really they can be used for a whole load of molecular “machines”. Graphene is so small itself it will slot into almost anything. For example in computer chips or sensors or by mixing graphene with other materials we can make them really strong.

Question: What is the smallest machine or structure that graphene nanosheets can be used for?