Basal-Plane Functionalization of Chemically Exfoliated Molybdenum Disulfide by Diazonium Salts

Journal article
(Original article)

Publication Details

Author(s): Knirsch K, Nerl HC, Cucinotta CS, Berner N, Gholamvand Z, McEvoy N, Wang Z, Abramovic I, Vecera P, Halik M, Sanvito S, Duesberg GS, Nicolosi V, Hauke F, Hirsch A, Coleman JN, Backes C
Journal: ACS nano
Publisher: American Chemical Society
Publication year: 2015
Volume: 9
Journal issue: 6
Pages range: 6018-6030
ISSN: 1936-0851
eISSN: 1936-086X
Language: English


Although transition metal dichalcogenides such as MoS2 have been recognized as highly potent two-dimensional nanomaterials, general methods to chemically functionalize them are scarce. Herein, we demonstrate a functionalization route that results in organic groups bonded to the MoS2 surface via covalent C-S bonds. This is based on lithium intercalation, chemical exfoliation and subsequent quenching of the negative charges residing on the MoS2 by electrophiles such as diazonium salts. Typical degrees of functionalization are 10-20 atom % and are potentially tunable by the choice of intercalation conditions. Significantly, no further defects are introduced, and annealing at 350 °C restores the pristine 2H-MoS2. We show that, unlike both chemically exfoliated and pristine MoS2, the functionalized MoS2 is very well dispersible in anisole, confirming a significant modification of the surface properties by functionalization. DFT calculations show that the grafting of the functional group to the sulfur atoms of (charged) MoS2 is energetically favorable and that S-C bonds are formed.

FAU Authors / FAU Editors

Halik, Marcus Prof. Dr.
Professur für Werkstoffwissenschaften (Polymerwerkstoffe)
Hauke, Frank Dr.
Zentralinstitut für Neue Materialien und Prozesstechnik
Hirsch, Andreas Prof. Dr.
Lehrstuhl für Organische Chemie II
Knirsch, Kathrin Dr.
Lehrstuhl für Organische Chemie II
Vecera, Philipp
Lehrstuhl für Organische Chemie II
Wang, Zhenxing
Sonderforschungsbereich 953/2 Synthetische Kohlenstoffallotrope

Additional Organisation
Exzellenz-Cluster Engineering of Advanced Materials

External institutions
Trinity College Dublin

How to cite

Knirsch, K., Nerl, H.C., Cucinotta, C.S., Berner, N., Gholamvand, Z., McEvoy, N.,... Backes, C. (2015). Basal-Plane Functionalization of Chemically Exfoliated Molybdenum Disulfide by Diazonium Salts. ACS nano, 9(6), 6018-6030.

Knirsch, Kathrin, et al. "Basal-Plane Functionalization of Chemically Exfoliated Molybdenum Disulfide by Diazonium Salts." ACS nano 9.6 (2015): 6018-6030.


Last updated on 2019-15-03 at 07:48