4 research outputs found
Charge transport in polycrystalline graphene : challenges and opportunities
Graphene has attracted significant interest both for exploring fundamental science and for a wide range of technological applications. Chemical vapor deposition (CVD) is currently the only working approach to grow graphene at wafer scale, which is required for industrial applications. Unfortunately, CVD graphene is intrinsically polycrystalline, with pristine graphene grains stitched together by disordered grain boundaries, which can be either a blessing or a curse. On the one hand, grain boundaries are expected to degrade the electrical and mechanical properties of polycrystalline graphene, rendering the material undesirable for many applications. On the other hand, they exhibit an increased chemical reactivity, suggesting their potential application to sensing or as templates for synthesis of one-dimensional materials. Therefore, it is important to gain a deeper understanding of the structure and properties of graphene grain boundaries. Here, we review experimental progress on identification and electrical and chemical characterization of graphene grain boundaries. We use numerical simulations and transport measurements to demonstrate that electrical properties and chemical modification of graphene grain boundaries are strongly correlated. This not only provides guidelines for the improvement of graphene devices, but also opens a new research area of engineering graphene grain boundaries for highly sensitive electro-biochemical devices
Charge Transport in Polycrystalline Graphene: Challenges and Opportunities
Graphene has attracted significant interest both for exploring fundamental
science and for a wide range of technological applications. Chemical vapor
deposition (CVD) is currently the only working approach to grow graphene at
wafer scale, which is required for industrial applications. Unfortunately, CVD
graphene is intrinsically polycrystalline, with pristine graphene grains
stitched together by disordered grain boundaries, which can be either a
blessing or a curse. On the one hand, grain boundaries are expected to degrade
the electrical and mechanical properties of polycrystalline graphene, rendering
the material undesirable for many applications. On the other hand, they exhibit
an increased chemical reactivity, suggesting their potential application to
sensing or as templates for synthesis of one-dimensional materials. Therefore,
it is important to gain a deeper understanding of the structure and properties
of graphene grain boundaries. Here, we review experimental progress on
identification and electrical and chemical characterization of graphene grain
boundaries. We use numerical simulations and transport measurements to
demonstrate that electrical properties and chemical modification of graphene
grain boundaries are strongly correlated. This not only provides guidelines for
the improvement of graphene devices, but also opens a new research area of
engineering graphene grain boundaries for highly sensitive electrobiochemical
devices
Charge Transport in Polycrystalline Graphene: Challenges and Opportunities
Graphene has attracted signifi cant interest both for exploring fundamental
science and for a wide range of technological applications. Chemical vapor
deposition (CVD) is currently the only working approach to grow graphene at
wafer scale, which is required for industrial applications. Unfortunately, CVD
graphene is intrinsically polycrystalline, with pristine graphene grains stitched
together by disordered grain boundaries, which can be either a blessing or a
curse. On the one hand, grain boundaries are expected to degrade the electrical
and mechanical properties of polycrystalline graphene, rendering the
material undesirable for many applications. On the other hand, they exhibit
an increased chemical reactivity, suggesting their potential application to
sensing or as templates for synthesis of one-dimensional materials. Therefore,
it is important to gain a deeper understanding of the structure and properties
of graphene grain boundaries. Here, we review experimental progress
on identifi cation and electrical and chemical characterization of graphene
grain boundaries. We use numerical simulations and transport measurements
to demonstrate that electrical properties and chemical modifi cation
of graphene grain boundaries are strongly correlated. This not only provides
guidelines for the improvement of graphene devices, but also opens a new
research area of engineering graphene grain boundaries for highly sensitive
electro-biochemical devices.172761sciescopu
Charge Transport in Polycrystalline Graphene: Challenges and Opportunities
Graphene has attracted significant interest both for exploring fundamental science and for a wide range of technological applications. Chemical vapor deposition (CVD) is currently the only working approach to grow graphene at wafer scale, which is required for industrial applications. Unfortunately, CVD graphene is intrinsically polycrystalline, with pristine graphene grains stitched together by disordered grain boundaries, which can be either a blessing or a curse. On the one hand, grain boundaries are expected to degrade the electrical and mechanical properties of polycrystalline graphene, rendering the material undesirable for many applications. On the other hand, they exhibit an increased chemical reactivity, suggesting their potential application to sensing or as templates for synthesis of one-dimensional materials. Therefore, it is important to gain a deeper understanding of the structure and properties of graphene grain boundaries. Here, we review experimental progress on identification and electrical and chemical characterization of graphene grain boundaries. We use numerical simulations and transport measurements to demonstrate that electrical properties and chemical modification of graphene grain boundaries are strongly correlated. This not only provides guidelines for the improvement of graphene devices, but also opens a new research area of engineering graphene grain boundaries for highly sensitive electro-biochemical devices