Engineering 2D Materials from Single-Layer NbS2
(2024) In Small- Abstract
Starting from a single layer of NbS2 grown on graphene by molecular beam epitaxy, the single unit cell thick 2D materials Nb5/3S3-2D and Nb2S3-2D are created using two different pathways. Either annealing under sulfur-deficient conditions at progressively higher temperatures or deposition of increasing amounts of Nb at elevated temperature result in phase-pure Nb5/3S3-2D followed by Nb2S3-2D. The materials are characterized by scanning tunneling microscopy, scanning tunneling spectroscopy, and X-ray photoemission spectroscopy. The experimental assessment combined with systematic density functional theory calculations reveals their... (More)
Starting from a single layer of NbS2 grown on graphene by molecular beam epitaxy, the single unit cell thick 2D materials Nb5/3S3-2D and Nb2S3-2D are created using two different pathways. Either annealing under sulfur-deficient conditions at progressively higher temperatures or deposition of increasing amounts of Nb at elevated temperature result in phase-pure Nb5/3S3-2D followed by Nb2S3-2D. The materials are characterized by scanning tunneling microscopy, scanning tunneling spectroscopy, and X-ray photoemission spectroscopy. The experimental assessment combined with systematic density functional theory calculations reveals their structure. The 2D materials are covalently bound without any van der Waals gap. Their stacking sequence and structure are at variance with expectations based on corresponding bulk materials highlighting the importance of surface and interface effects in structure formation.
(Less)
- author
- organization
- publishing date
- 2024
- type
- Contribution to journal
- publication status
- in press
- subject
- keywords
- covalent transformation, molecular beam-epitaxy, niobium disulfide, single layer
- in
- Small
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- pmid:39584382
- scopus:85210081503
- ISSN
- 1613-6810
- DOI
- 10.1002/smll.202408044
- language
- English
- LU publication?
- yes
- id
- 9f865ace-c1a5-46b6-b859-be65022caa6b
- date added to LUP
- 2025-01-15 14:36:40
- date last changed
- 2025-03-26 22:13:48
@article{9f865ace-c1a5-46b6-b859-be65022caa6b,
abstract = {{<p>Starting from a single layer of NbS<sub>2</sub> grown on graphene by molecular beam epitaxy, the single unit cell thick 2D materials Nb<sub>5/3</sub>S<sub>3</sub>-2D and Nb<sub>2</sub>S<sub>3</sub>-2D are created using two different pathways. Either annealing under sulfur-deficient conditions at progressively higher temperatures or deposition of increasing amounts of Nb at elevated temperature result in phase-pure Nb<sub>5/3</sub>S<sub>3</sub>-2D followed by Nb<sub>2</sub>S<sub>3</sub>-2D. The materials are characterized by scanning tunneling microscopy, scanning tunneling spectroscopy, and X-ray photoemission spectroscopy. The experimental assessment combined with systematic density functional theory calculations reveals their structure. The 2D materials are covalently bound without any van der Waals gap. Their stacking sequence and structure are at variance with expectations based on corresponding bulk materials highlighting the importance of surface and interface effects in structure formation.</p>}},
author = {{Knispel, Timo and Mohrenstecher, Daniela and Speckmann, Carsten and Safeer, Affan and van Efferen, Camiel and Boix, Virgínia and Grüneis, Alexander and Jolie, Wouter and Preobrajenski, Alexei and Knudsen, Jan and Atodiresei, Nicolae and Michely, Thomas and Fischer, Jeison}},
issn = {{1613-6810}},
keywords = {{covalent transformation; molecular beam-epitaxy; niobium disulfide; single layer}},
language = {{eng}},
publisher = {{John Wiley & Sons Inc.}},
series = {{Small}},
title = {{Engineering 2D Materials from Single-Layer NbS<sub>2</sub>}},
url = {{http://dx.doi.org/10.1002/smll.202408044}},
doi = {{10.1002/smll.202408044}},
year = {{2024}},
}