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Graphene Lab Tour

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by

Mathieu Massicotte

on 9 May 2014

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Transcript of Graphene Lab Tour

Graphene Lab Tour
c
c
c
c
c
c
Structure
Fullerene (C60)
0D
Nanotube
1D
Graphite
3D

I.
Thinnest
imaginable material

II. Almost
transparent
(absorbs only 2.3% of the light intensity)

III.
Strongest
material ‘ever measured’ (more than 100 times
stronger than the strongest steel)

IV.
Stiffest
known material (stiffer than diamond)

V. Most
stretchable
crystal (up to 20% elastically)

VI. Record thermal conductivity (outperforming diamond)

VII.Highest current density at room T (106 times of copper)

VIII. Completely impermeable (even He cannot squeeze through)

IX. Highest intrinsic mobility (100 times more than in Si)

etc...
Graphene Superlatives
[A.K. Geim et al., Nature Mater. 6 (2007)]

- No bandgap
- Linear dispersion relation

-->Electrons behave like massless particle (~photons)



Electronic properties
Graphene
semiconductor
We can tune the # of electrons in graphene by applying an external voltage!
Optical properties
Application:
Transistor effect
[R. Nair et al., Science 320 (2008)]

2.3% absorption

Broadband Absorption

Application:
Flexible screen
[J-H Ahn et al, Nature Nanotechnology, 2010]
How can we "get"
graphene?
Exfoliation

CVD Graphene

C
hemical
V
apor
D
eposition
[F. Bonaccorso et al. Nature Photonics 4, 611 - 622 (2010)]
Why is it special?
Synthesis methods
Konstantatos et al., Nature Nanotech. 2012

Hybrid graphene quantum dot
photodetectors

Graphene @
Nano-optoelectronic group
Graphene Plasmonics

Photodetection
and carrier dynamics

Quantum
opto-electronics

Quantum opto-mechanics
Full transcript