Type

Journal Article

Authors

Aidan R McDonald
Georg S Duesberg
Claudia Backes
Nina C Berner
Xin Chen

Subjects

Chemistry

Topics
transition metal surface mos2 reaction organic thiols two dimensional functionalization

Functionalization of Two-Dimensional MoS2 : On the Reaction Between MoS2 and Organic Thiols. (2015)

Abstract Two-dimensional layered transition metal dichalcogenides (TMDs) have attracted great interest owing to their unique properties and a wide array of potential applications. However, due to their inert nature, pristine TMDs are very challenging to functionalize. We demonstrate a general route to functionalize exfoliated 2H-MoS2 with cysteine. Critically, MoS2 was found to be facilitating the oxidation of the thiol cysteine to the disulfide cystine during functionalization. The resulting cystine was physisorbed on MoS2 rather than coordinated as a thiol (cysteine) filling S-vacancies in the 2H-MoS2 surface, as originally conceived. These observations were found to be true for other organic thiols and indeed other TMDs. Our findings suggest that functionalization of two-dimensional MoS2 using organic thiols may not yield covalently or datively tethered functionalities, rather, in this instance, they yield physisorbed disulfides that are easily removed.
Collections Ireland -> Trinity College Dublin -> PubMed

Full list of authors on original publication

Aidan R McDonald, Georg S Duesberg, Claudia Backes, Nina C Berner, Xin Chen

Experts in our system

1
Aidan Mcdonald
Trinity College Dublin
Total Publications: 29
 
2
Georg Duesberg
Trinity College Dublin
Total Publications: 116
 
3
Claudia Backes
Trinity College Dublin
Total Publications: 20
 
4
Nina C Berner
Trinity College Dublin
Total Publications: 20
 
5
Xin Chen
Trinity College Dublin
Total Publications: 5