Method of forming amorphous carbon monolayer and electronic device including amorphous carbon monolayer
A method of forming an amorphous carbon monolayer (ACM) and an electronic device including the ACM are provided. The method includes forming the ACM on a surface of a germanium (Ge) substrate via a chemical vapor deposition (CVD) process. The CVD process includes injecting a reaction gas including carbon-containing gas and hydrogen (H 2 ) gas in to a reaction chamber containing the Ge substrate, wherein a partial pressure of the H 2 gas in the reaction chamber may range from 1 Torr to 30 Torr.
1. A method of forming an amorphous carbon monolayer (ACM), the method comprising forming the ACM on a surface of a germanium (Ge) substrate via chemical vapor deposition (CVD) process,
wherein the CVD process comprises injecting a reaction gas comprising carbon-containing gas and hydrogen (H 2 ) gas into a reaction chamber containing the Ge substrate, and
wherein a partial pressure of the H 2 gas in the reaction chamber is in the range of from 1 Torr to 30 Torr,
wherein the ACM is amorphous and is a 2D single carbon atom layer,
wherein a volume ratio of the carbon-containing gas to the H 2 gas is at least 0.05, and
wherein a processing temperature in the reaction chamber is in a range of from 850° C. to 937° C.
2. The method of claim 1 , wherein a volume ratio of the carbon-containing gas to the H 2 gas is at least 0.1.
3. The method of claim 2 , wherein the volume ratio of the carbon-containing gas to the H 2 gas is at least 0.2.
4. The method of claim 1 , wherein inert gas is injected into the reaction chamber in addition to the carbon-containing gas and the H 2 gas.
5. The method of claim 1 , wherein the Ge substrate is provided on a supporting substrate.
6. The method of claim 5 , wherein the supporting substrate comprises a silicon (Si) wafer.
7. The method of claim 5 , wherein the supporting substrate comprises SiO 2 , Al 2 O 3 , GaN, quartz, or Ge oxide.
8. The method of claim 5 , wherein the Ge substrate is provided on the supporting substrate by CVD, PVD or wafer bonding.
9. The method of claim 1 , wherein in the ACM, a ratio of sp 3 -bonded carbon atoms to sp 2 -bonded carbon atoms is 0.2 or less.
10. A method of improving the electrical conductivity of a structure containing a graphene layer on a substrate, the method comprising either (1) forming at least one amorphous carbon monolayer (ACM) between the substrate and the graphene layer; or (2) forming at least one amorphous carbon monolayer (ACM) on the side of the graphene layer furthest from the substrate,
wherein the at least one ACM is amorphous and a 2D single carbon atom layer,
wherein the at least one ACM is formed via chemical vapor deposition (CVD) during which a reaction gas injected into a reaction chamber, and
wherein the reaction gas comprises carbon-containing gas and hydrogen (H 2 ) gas, and a partial pressure of the H 2 gas in the reaction chamber is in the range of from 1 Torr to 30 Torr,
wherein a volume ratio of the carbon-containing gas to the H 2 gas is at least 0.05, and
wherein a processing temperature in the reaction chamber is in a range of from 850° C. to 937° C.
11. The method of claim 10 , wherein a volume ratio of the carbon-containing gas to the H 2 gas is at least 0.1.
12. The method of claim 11 , wherein the volume ratio of the carbon-containing gas to the H 2 gas is at least 0.2.
13. The method of claim 10 , wherein inert gas is injected into the reaction chamber in addition to the carbon-containing gas and the H 2 gas.
14. The method of claim 10 , wherein the substrate is provided on a supporting substrate.
15. The method of claim 14 , wherein the supporting substrate comprises a silicon (Si) wafer.
16. The method of claim 14 , wherein the supporting substrate comprises SiO 2 , Al 2 O 3 , GaN, quartz, or Ge oxide.
17. The method of claim 10 , wherein in the ACM, a ratio of sp 3 -bonded carbon atoms to sp 2 -bonded carbon atoms is 0.2 or less.