Type

Journal Article

Authors

Hongzhou Zhang
Mauro S Ferreira
John J Gough
Pierce Maguire
John J Boland
A Louise Bradley
Aleksey Schmeliov
Clive Downing
Ian O'Reilly
Conor P Cullen
and 9 others

Subjects

Chemistry

Topics
transition metal materials science 2d semiconductors electronic properties two dimensional 2d nanomaterials chemical modification molybdenum disulfide mos2 new approaches

Oxide-mediated recovery of field-effect mobility in plasma-treated MoS2 (2018)

Abstract Precise tunability of electronic properties of two-dimensional (2D) nanomaterials is a key goal of current research in this field of materials science. Chemical modification of layered transition metal dichalcogenides leads to the creation of heterostructures of low-dimensional variants of these materials. In particular, the effect of oxygen-containing plasma treatment on molybdenum disulfide (MoS2) has long been thought to be detrimental to the electrical performance of the material. We show that the mobility and conductivity of MoS2 can be precisely controlled and improved by systematic exposure to oxygen/argon plasma and characterize the material using advanced spectroscopy and microscopy. Through complementary theoretical modeling, which confirms conductivity enhancement, we infer the role of a transient 2D substoichiometric phase of molybdenum trioxide (2D-MoOx) in modulating the electronic behavior of the material. Deduction of the beneficial role of MoOx will serve to open the field to new approaches with regard to the tunability of 2D semiconductors by their low-dimensional oxides in nano-modified heterostructures.
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Full list of authors on original publication

Hongzhou Zhang, Mauro S Ferreira, John J Gough, Pierce Maguire, John J Boland, A Louise Bradley, Aleksey Schmeliov, Clive Downing, Ian O'Reilly, Conor P Cullen and 9 others

Experts in our system

1
Hongzhou Zhang
Trinity College Dublin
Total Publications: 50
 
2
Mauro Ferreira
Trinity College Dublin
Total Publications: 64
 
3
John J Gough
Trinity College Dublin
Total Publications: 5
 
4
Pierce Maguire
Trinity College Dublin
Total Publications: 11
 
5
John J Boland
Trinity College Dublin
Total Publications: 82
 
6
Ann Louise Bradley
Trinity College Dublin
Total Publications: 37
 
7
Clive Downing
Trinity College Dublin
Total Publications: 11
 
8
Conor P Cullen
University College Cork
Total Publications: 8