| abstract |
Method, comprising: Forming a graphene layer (2) on a substrate (1); Depositing a diffusion-selective plastic material (3) on the graphene layer (2) to at least partially cover the graphene layer (2), the diffusion-selective plastic material (3) being adapted to selectively expose the exposed portion of the graphene layer (2) to environmental substances to control; Separating the substrate (1) into at least two substrate pieces; and Encapsulating each piece of substrate in an encapsulating material to form an encapsulating body (14, 65, 67), the encapsulating body (14, 65, 67) having an opening (17) for exposing the plastics material (3). |