Systems for transferring graphene
The present disclosure is directed towards systems for transferring graphene from the surface of one substrate to another. In one particular embodiment, the graphene layer is grown on a surface of a first substrate, where the bottom of the first substrate is then affixed to the surface of a second substrate. The second substrate may include material made of a rigid or semi-rigid composition to provide structural support and backing to the first substrate. The graphene layer may then be delaminated from the first substrate and transferred to a target surface, such as the surface of an electronic device or biosensor.
1. A system for transferring graphene comprising:
a graphene wafer comprising:
a growth substrate for growing a graphene layer, wherein the growth substrate is defined by an outer edge scored with a plurality of score marks; and
a transitory substrate affixed to the growth substrate;
a container filled with a conductive solution configured, when electrified, to form bubbles at least at the outer edge of the growth substrate; and
an arm connected to a platform supporting the graphene wafer for immersing the platform in and out of the conductive solution.
2. The system of claim 1 , wherein the arm is connected to a linear actuator for immersing the platform in and out of the conductive solution at a steady immersion rate.
3. The system of claim 1 , further comprising a camera to provide a camera feed of the container for monitoring a delamination of the graphene layer from the growth substrate.
4. The system of claim 1 , wherein the growth substrate comprises copper.
5. The system of claim 1 , wherein the transitory substrate comprises glass, plastic, metal, silicon, silicon oxide, aluminum, or aluminum oxide.
6. The system of claim 5 , wherein the transitory substrate comprises an adhesive layer on the transitory substrate to affix the growth substrate to the transitory substrate.
7. The system of claim 1 , wherein the transitory substrate comprises metal, aluminum, or aluminum oxide.
8. The system of claim 7 , wherein the transitory substrate comprises an adhesive layer on the transitory substrate to affix the growth substrate to the transitory substrate.
9. The system of claim 1 , wherein delamination of the graphene from the growth substrate occurs at a delamination rate corresponding to a steady immersion rate of the platform.