A critical review of the effects of fluid dynamics on graphene growth in atmospheric pressure chemical vapor deposition
Chemical vapor deposition (CVD) of graphene has attracted high interest in the electronics industry due to its potential scalability for large-scale production. However, producing a homogeneous thin-film graphene with minimal defects remains a challenge. Studies of processing parameters, such as g...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English English English |
| Published: |
Cambridge University Press
2018
|
| Subjects: | |
| Online Access: | http://irep.iium.edu.my/71165/ http://irep.iium.edu.my/71165/ http://irep.iium.edu.my/71165/ http://irep.iium.edu.my/71165/1/71165_A%20critical%20review%20of%20the%20effects%20of%20fluid.pdf http://irep.iium.edu.my/71165/2/71165_A%20critical%20review%20of%20the%20effects%20of%20fluid_SCOPUS.pdf http://irep.iium.edu.my/71165/3/71165_A%20critical%20review%20of%20the%20effects%20of%20fluid_WOS.pdf |
| Summary: | Chemical vapor deposition (CVD) of graphene has attracted high interest in the electronics
industry due to its potential scalability for large-scale production. However, producing a homogeneous thin-film graphene with minimal defects remains a challenge. Studies of processing
parameters, such as gas precursors, flow rates, pressures, temperatures, and substrate types, focus
on improving the chemical aspect of the deposition. Despite the many reports on such parameters,
studies on fluid dynamic aspects also need to be considered since they are crucial factors in
scaling up the system for homogenous deposition. Once the deposition kinetics is thoroughly
understood, the next vital step is fluid dynamics optimization to design a large-scale system that
could deliver the gas uniformly and ensure maximum deposition rate with the desired property. In
this review, the influence of fluid dynamics in graphene CVD process was highlighted. The basics
and importance of CVD fluid dynamics was introduced. It is understood that the fluid dynamics
of gases can be controlled in two ways: via reactor modification and gas composition. This paper
begins first with discussions on horizontal tubular reactor modifications. This is followed by
mechanical properties of the reactant gasses especially in terms of dimensionless Reynolds
number which provides information on gas flow regime for graphene CVD process at atmospheric
pressure. Data from the previous literature provide the Reynolds number for various gas
compositions and its relation to graphene quality. It has been revealed that hydrogen has a major
influence on the fluid dynamic conditions within the CVD, hence affecting the quality of the
graphene produced. Focusing on atmospheric pressure CVD, suggestions for up-scaling into
larger CVD reactors while maintaining similar fluid properties were also provided. |
|---|