Oxidation and phase transition in covalently functionalized MoS2

Moses Badlyan N, Pettinger N, Enderlein N, Gillen R, Chen X, Zhang W, Knirsch K, Hirsch A, Maultzsch J (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Physical Review B American Physical Society

Book Volume: 106

Article Number: 104103

Journal Issue: 10

DOI: 10.1103/PhysRevB.106.104103

Abstract

We present a Raman study of MoS2 powders and MoS2 individual layers covalently functionalized with organic molecules. In MoS2 powders, the defect-induced "LA"Raman mode shows evidence for successful functionalization. Increasing temperature induces oxidation of both functionalized and nonfunctionalized MoS2 into MoO3. In contrast, mechanically exfoliated individual MoS2 layers do not transfer into MoO3 under the same conditions. Instead, the Raman spectra show that the procedure of covalent functionalization leads to a partial transition from the 2H into the 1T' crystallographic phase in few-layer MoS2. We support the identification of the 1T' phase by DFT calculations of the corresponding vibrational modes in the mono- and bilayer 1T'-MoS2.

Authors with CRIS profile

Narine Moses Badlyan Lehrstuhl für Experimentalphysik Roland Gillen Lehrstuhl für Experimentalphysik Xin Chen Sonderforschungsbereich 953/3 Synthetische Kohlenstoffallotrope Wanzheng Zhang Lehrstuhl für Organische Chemie II Kathrin Knirsch Lehrstuhl für Organische Chemie II Andreas Hirsch Lehrstuhl für Organische Chemie II Janina Maultzsch Lehrstuhl für Experimentalphysik

How to cite

APA:

Moses Badlyan, N., Pettinger, N., Enderlein, N., Gillen, R., Chen, X., Zhang, W.,... Maultzsch, J. (2022). Oxidation and phase transition in covalently functionalized MoS2. Physical Review B, 106(10). https://dx.doi.org/10.1103/PhysRevB.106.104103

MLA:

Moses Badlyan, Narine, et al. "Oxidation and phase transition in covalently functionalized MoS2." Physical Review B 106.10 (2022).

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