Los días 22 y 23 de junio de 2016 organizamos en la Fundación Ramón Areces un simposio internacional sobre 'Materiales bidimensionales: explorando los límites de la física y la ingeniería'. En colaboración con el Massachusetts Institute of Technology (MIT), científicos de este prestigioso centro de investigación mostraron las propiedades únicas de materiales como el grafeno, de solo un átomo de espesor, y al mismo tiempo más resistente que el acero y mucho más ligero.
6. • Graphene transistors with low on/off ratio
– High consumption
– Low reliability
– No bit operations
Why beyond graphene?
• MoS2 transistors with large on/off ratio
• Low consumption
• High reliability
• Multiple bit operations
A. Kis’s groupManchester group
7. • Graphene transistors with low on/off ratio
– High consumption
– Low reliability
– No bit operations
• MoS2 transistors with large on/off ratio
• Low consumption
• High reliability
• Multiple bit operations
A. Kis’s group
Why beyond graphene?
Manchester group
8. 2D Optoelectronics
Lee et al. Nano Letters (2012)
Yin et al. ACS Nano (2012)
Choi et al. Adv. Mater. (2012)
Buscema et al. Nano Letters (2013)
Ultrahigh photoresponse
MoS2 phototransistor
Lopez-Sanchez et al. Nature Nano. (2013)
9. 2D Optoelectronics
Lee et al. Nano Letters (2012)
Yin et al. ACS Nano (2012)
Choi et al. Adv. Mater. (2012)
Buscema et al. Nano Letters (2013)
MoS2 phototransistor
Lopez-Sanchez et al. Nature Nano. (2013)
10. MoS2 phototransistor
Lee et al. Nano Letters (2012)
Yin et al. ACS Nano (2012)
Choi et al. Adv. Mater. (2012)
Buscema et al. Nano Letters (2013)
Limitted bandwidth!
2D Optoelectronics
Lopez-Sanchez et al. Nature Nano. (2013)
11. MoS2 phototransistor
Lee et al. Nano Letters (2012)
Yin et al. ACS Nano (2012)
Choi et al. Adv. Mater. (2012)
Buscema et al. Nano Letters (2013)
And slow!
2D Optoelectronics
Lopez-Sanchez et al. Nature Nano. (2013)
12. MoS2 based photodetection
2D Optoelectronics
Ultrahigh photoresponse
(0.1-800 A/W)
Narrow bandwidth
Low optical absorption
Slow response time
Unipolar (no PN junctions)
13. MoS2 based photodetection
2D Optoelectronics
Ultrahigh photoresponse
(0.1-800 A/W)
Narrow bandwidth
Low optical absorption
Slow response time
Unipolar (no PN junctions)
Advances in fundamental physics
and/or applications often come in the
form of new, unexplored materials
14. New layered materials
Yuangbo Zhang’s group. Nature Nanotech. (2014)
Peide Ye’s group. ACS Nano (2014)
Barbaros & Castro-Neto’s group. App. Phys. Lett. (2014)
Castellanos-Gomez et al. 2D Materials (2014)
Buscema et al. Nano Letters (2014)
Buscema et al. Nature Communications (2014)
Island et al. 2D Materials (2015)
Island et al. Adv. Opt. Mater. (2014)
Island et al. Adv. Mater. (2015)
Island et al. Sci. Rep. (2016)
TiS3
1.0 eV (direct) even in bulk
Black phosphorus
0.33 eV (direct) even in bulk
In2Se3
1.4 eV (direct) even in bulk
Bin Yu’s group. ACS Nano (2014)
Island et al. Nano Lett. (2015)
31. Sumary
TiS3
Huge photoresponse
Huge anisotropy
Response up to 1050 nm
Fast (5 msec)
Black phosphorus
Response up to 1050 nm
Fast (5 msec)
Ambipolar
Small photoresponse
Degradation
In2Se3
Huge photoresponse
Response up to 950 nm
Huge quantum confinement 1.4 eV – 2.8 eV
Slow (100 msec)
40. Naturally occurring vdW heterostructure
Ultrathin heterostructure by simply cleaving
P-type
Narrow gap (<0.7 eV)
Air-stable
41. MSc. Joshua
Island
Prof. Herre S. J.
van der Zant
Dr. Lucia
Aballe
Dr. Michael
Foerster
Dr. Miguel
Angel Niño
Dr. Emilio
M. Perez
Prof. Nicolás
Agraït
Prof. Gabino
Rubio-Bollinger
MSc. Aday J.
Molina-Mendoza
Dr. Emerson
Giovanelli
Dr. Charalambos
Evangeli
Prof. Juan Jose
Palacios
Msc. Wendel
Paz
Dr. Michele
Buscema