Chemically Exfoliated 2D MoS2 

on Friday July 9, 2021 at at  5.30 pm to 7.00 pm

(Through The link of the website is


Bulk MoS2 is a layered compound. This makes it easy to prepare MoS2 in two-dimensional forms by mechanical as well as by chemical exfoliation methods. Many remarkable properties have been observed for variously prepared two-dimensional MoS2 samples. Specifically, chemically exfoliated samples have been demonstrated to have extraordinary supercapacitive properties as well as high efficiency for hydrogen evolution reactions, among many other interesting applications. It is generally believed that many of these interesting properties arise from the presence of a metastable polymorph with structural and electronic properties distinctly different from the majority phase containing the stable H form in such chemically exfoliated few layer samples of MoS2. However, the phase identification, as well as the determination of the properties of these metastable phase has proven to be elusive with many contradictory claims in the literature. In this talk, I shall briefly introduce various interesting applications of chemically exfoliated MoS2, followed by how the nature and origin of the metastable phase may be resolved with the help of spatially resolved spectroscopic techniques. Finally, I shall demonstrate how one may probe more complex heterostructures such as of MoS2 with h-BN and graphene using a similar approach to provide microscopic understanding of device properties.

Moderator: Prof. Paul S. Weiss (University of California, Los Angeles) 

Panelist: Prof. Roy Vellaisamy (University of Glasgow), Dr.Zhuo Li (Fudan University) 

XChallenger: Dr.GovindanKutty (National University of Singapore) 

The official poster of this talk can be viewed at