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DS: Fachverband Dünne Schichten
DS 14: 2D Materials II (joint session DS/HL)
DS 14.4: Vortrag
Mittwoch, 11. März 2026, 15:45–16:00, REC/C213
Physical Properties of Ti3C2Cl2 MXenes — •Moritz Vanselow1, Maksim Riabov2, Thierry Ouisse2, Hanna Pazniak2, and Ulf Wiedwald1 — 1University of Duisburg-Essen and Center for Nanointegration Duisburg-Essen — 2Université Grenoble Alpes, CNRS, Grenoble INP, LMGP, France
Hydrophobic Ti3C2Cl2 MXenes are synthesized by Lewis acid molten-salt etching of Ti3C2Cl2 followed by delamination process[1] and subsequently deposited from acetonitrile suspension (∼ 0.1 mg/mL) on Si(100)/SiO2 substrates. Using in-situ mass spectrometry and Auger electron spectroscopy in ultrahigh vacuum, we show that Ti3C2Cl2 exhibits enhanced thermal robustness up to 900∘C as compared to conventional mixed-terminated Ti3C2Tx MXenes with Tx = −F, =O, and −OH. Complementary ex situ XRD and XPS confirm the absence of intercalated water and uniform − Cl terminations, resulting in sharp and intense (00l) peaks with c = 2.223 ± 0.015 nm and reflecting its high degree of structural order. Low-temperature specific heat measurements reveal distinct phonon signatures expected for the two-dimensional Ti3C2Cl2. We determined the Debye temperature to 548 K in a temperature interval 20–50 K consistent with DFT model calculations[2] and a Sommerfeld constant of γ = 19.2 mJ mol−1 K−2. This work is supported by ANR-23-CE09-0031-01 and DFG ID 530103526.
[1] T. Zhang et al., Chem. Mater. 36, 1998 (2024). [2] M. Riabov, M. Vanselow, et al., npj 2D Materials & Applications 2025, accepted
Keywords: MXene; Ti3C2Cl2; Physical Properties of 2D MXenes; 2D Material