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

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 (2015)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2015

Journal

ACS nano American Chemical Society

Publisher: American Chemical Society

Book Volume: 9

Pages Range: 6018-6030

Journal Issue: 6

DOI: 10.1021/acsnano.5b00965

Abstract

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.

Authors with CRIS profile

Kathrin Knirsch Lehrstuhl für Organische Chemie II Zhenxing Wang Sonderforschungsbereich 953/3 Synthetische Kohlenstoffallotrope Philipp Vecera Lehrstuhl für Organische Chemie II Marcus Halik Professur für Werkstoffwissenschaften (Polymerwerkstoffe) Frank Hauke Zentralinstitut für Neue Materialien und Prozesstechnik Andreas Hirsch Lehrstuhl für Organische Chemie II

Additional Organisation(s)

Exzellenz-Cluster Engineering of Advanced Materials (EAM)

Involved external institutions

Trinity College Dublin IE Ireland (IE)

How to cite

APA:

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. https://doi.org/10.1021/acsnano.5b00965

MLA:

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

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