2D materials

Key aspect is the bottom-up growth of 2D transition metal dichalcogenides such as binary MoS₂ and WS₂ and ternary (Mo,W)S₂ by atomic layer deposition (ALD). To use these layers for opto-electronic applications, monolayers can be grown by a modified ALD process ("sub-ALD"). Subsequent "confined-space annealing" can be applied to further optimize the layer quality. Monolayers can additionally be fabricated top-down by laser-thinning of multilayers.

Project related publications

Project related presentations at conferences

Project related bachelor thesis

Confined-space annealing of 2D transition metal dichalcogenides: Improving properties, material reorganization, and chalcogen exchange

Christian Tessarek, Christian Petersen, Tim Grieb, Florian F. Krause, Alexander Karg, Christian Habben, Andreas Rosenauer, Martin Eickhoff

APL Materials 13, 061105 (2025)

DOI: https://doi.org/10.1063/5.0250685

Atomic vs. sub-atomic layer deposition: impact of growth rate on the optical and structural properties of MoS₂ and WS₂

Christian Tessarek, Tim Grieb, Florian F. Krause, Christian Petersen, Alexander Karg, Alexander Hinz, Niels Osterloh, Christian Habben, Stephan Figge, Jon-Olaf Krisponeit, Thomas Schmidt, Jens Falta, Andreas Rosenauer, Martin Eickhoff

2D Materials 11, 025031 (2024)

DOI: 10.1088/2053-1583/ad3134

Controlled Laser-Thinning of MoS₂ Nanolayers and Transformation to Amorphous MoO_x for 2D Monolayer Fabrication

Christian Tessarek, Oleg Gridenco, Martin Wiesing, Jan Mü?ener, Stephan Figge, Kathrin Sebald, Jürgen Gutowski, Martin Eickhoff

ACS Applied Nano Materials 4, 7490 (2020)

DOI: 10.1021/acsanm.0c01104

Excitons Bound to Defect States in Two-dimensional (2D) MoS₂

Oleg Gridenco, Kathrin Sebald, Christian Tessarek, Sven Mehrkens, Martin Eickhoff, Jürgen Gutowski

IEEE Transactions on Nanotechnology 20, 400 (2021)

DOI: 10.1109/TNANO.2021.3076574

Vortrag: Modifying properties of 2D transition metal dichalcogenides by confined-space annealing

Christian Tessarek, Christian Petersen, Tim Grieb, Florian F. Krause, Alexander Karg, Christian Habben, Jens Falta, Andreas Rosenauer, Martin Eickhoff

Frühjahrstagung der Deutschen Physikalischen Gesellschaft, Regensburg, M?rz 2025

Poster: Multi-method characterization of initial growth of a MoS₂ layer by atomic layer deposition

Christian Petersen, Christian Tessarek, Alexander Karg, Alexander Hinz, Niels Osterloh, Martin Eickhoff

Spring Meeting of the Deutsche Physikalische Gesellschaft, Berlin, March 2024

Talk: Impact of atomic layer deposition growth rate on the properties of MoS₂ and WS₂

Christian Tessarek, Tim Grieb, Florian F. Krause, Christian Petersen, Alexander Karg, Alexander Hinz, Niels Osterloh, Christian Habben, Stephan Figge, Andreas Rosenauer, Martin Eickhoff

Spring Meeting of the Deutsche Physikalische Gesellschaft, Berlin, March 2024

Talk: Optical and structural properties of ternary MoWS₂ grown by atomic layer deposition