Bords et défauts de matériaux 2D : nano-spectroscopie TERSAxe 4 - Dimensionnalité et confinement

Axe 4 - Dimensionnalité et confinement

Projets de post-doctorat de Johan Biscaras

Mené du 1^er février 2014 au 31 juillet 2015

Laboratoires co-porteurs

• Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC)
  Porteur de projet : Abhay Shukla
  Équipe : MIMABADI (mineralogie and magnetism at low dimensionality)
• Laboratoire Interfaces et Systèmes Électrochimiques (LISE)
  Co-encadrants : Emmanuel Maisonhaute, Ivan Lucas

Résumé

We study the properties of 2D materials like graphene and ultra-thin films of layered semi-condcutors (e.g. : MoS2, InSe,... ) that we fabricate with our original technique of electrostatic bonding to a glass substrate. We modify the transport properties of these materials by tuning the electrostatic doping induced by the substrate.
The large range of doping accessible by this technique allows to induce phase transitions in the 2D material (insulator to metallic, and metallic to superconductor).Another part of this Axe 4 - Dimensionnalité et confinementproject is the developpement of superresolved
Tip-Enhanced Raman Spectroscopy (TERS) to study edge states and defects (intrinsinc or electrochemically induced in collaboration with E. Maisonhaute and I. Lucas from LISE lab) of these 2D materials.

Publications

• Zhesheng Chen, Johan Biscaras, Abhay Shukla.
  A high performance graphene/few-layer InSe photo-detector
  Nanoscale, Royal Society of Chemistry, 2015, 7, pp.5981-5986.
  DOI : 10.1039/C5NR00400D
  Ref Hal : hal-01136120v1 
• Zhesheng Chen, Johan Biscaras, Abhay Shukla.
  Optimal light harvesting in 2D semiconductor heterostructures
  2D Materials, IOP Publishing, 2017, 4, pp.025115
  DOI : 10.1088/2053-1583/aa736f
  Ref Hal : hal-01552781v1
• Johan Biscaras, Zhesheng Chen, Andrea Paradisi, Abhay Shukla.
  Onset of two-dimensional superconductivity in space charge doped few-layer molybdenum disulfide
  Nature Communications, Nature Publishing Group, 2015, 6, pp.8826.
  DOI : 10.1038/ncomms9826
  ref HAL : hal-01502198v1
• Andrea Paradisi, Johan Biscaras, Abhay Shukla.
  Space charge induced electrostatic doping of two-dimensional materials: Graphene as a case study
  Applied Physics Letters, American Institute of Physics, 2015, 107 (14), pp.143103. 〈10.1063/1.4932572〉
  Ref HAL : hal-01220521v1