Strain-Induced Conductance Modulation in Graphene Grain Boundary

Grain boundaries (GBs) are ubiquitous in polycrystalline graphene materials obtained by various growth methods. It has been shown previously that considerable electrical transport gap can be opened by grain boundaries. On the other hand, polycrystalline graphene with GBs is an atomically thin membra...

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Bibliographic Details
Published in:Nano letters 2012-03, Vol.12 (3), p.1362-1366
Main Authors: Kumar, S. Bala, Guo, Jing
Format: Article
Language:English
Subjects:
Applied sciences
Computer Simulation
Cross-disciplinary physics: materials science
rheology
Elastic Modulus
Electric potential
Electronics
Exact sciences and technology
Fullerenes and related materials
diamonds, graphite
Grain boundaries
Graphene
Graphite - chemistry
Materials science
Mathematical models
Models, Chemical
Models, Molecular
Modulation
Molecular electronics, nanoelectronics
Nanostructure
Nanostructures - chemistry
Nanostructures - ultrastructure
Particle Size
Physics
Quantum Theory
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Specific materials
Strain
Stress, Mechanical
Tensile Strength
Transport
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Summary:Grain boundaries (GBs) are ubiquitous in polycrystalline graphene materials obtained by various growth methods. It has been shown previously that considerable electrical transport gap can be opened by grain boundaries. On the other hand, polycrystalline graphene with GBs is an atomically thin membrane that can sustain extraordinary amount of strain. Here, by using atomistic quantum transport numerical simulations, we examine modulation of electrical transport properties of graphene GBs. The results indicate the modulation of transport gap and electrical conductance strongly depends on the topological structure of the GB. The transport gap of certain GBs can be significantly widened by strain, which is useful for improving the on–off ratio in potential transistor applications and for applications as monolayer strain sensors.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl203968j