Bi-dimensional (2D) materials are sometimes presented as special class of compounds with little in common with their three dimensional (3D) counterparts. Yet, there is a discrete but near continuous evolution as one reduces the thickness, layer by layer, from the bulk form (3D) to the final single mono-layer (2D). In this talk, I will start by examples of such evolution and how the related electronic band structure is affected by the overall thickness reduction. One of the current limits of 2D materials is our capacity to manufacture them over large surfaces, with a low-enough defect density while maintaining the critical thickness control. We will focus here on Chemical Vapor Deposition (CVD) and the chalcogenides family (WSe2, WS2, WTe2, etc…), highlighting the possibilities of this technique for the direct growth of single, bi-layer and ternary alloys. We will see that the growth facilities must be associated to a quite an array of characterization tools (Raman, PL, TEM, SHG) to correctly identify and assess the quality of the grown material, whether it is aimed at fundamental research or at device fabrication.

​​
More information :https://www.spintec.fr/seminar-cvd-growth-and-properties-of-bi-dimensional-chalcogenides/​​

Videoconference ​: https://univ-grenoble-alpes-fr.zoom.us/j/98769867024?pwd=dXNnT3RMeThjYStybGVQSUN0TVdJdz09​