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PreprintCC BYChemRxiv

Epitaxial Growth, Electronic Transitions, and Size-Dependent Cavity Modes of WS2@ReSe2 Core–Shell Nanotubes

  • Jakub Zalesak1
  • Lothar Houben2,3
  • Vjosa Hoda4
  • Ramon Pinna Brito4
  • Emil Parth4
  • Stuart Robertson5
  • Zhaoxia Zhou5
  • Kristyna Bukvisova6
  • Zdenek Sofer7
  • Thomas Pichler4
  • Paola Ayala4
  • Vojtech Kundrat1,6
7 affiliations
  1. 1Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, Brno, 62500
  2. 2Department of Chemical Research Support
  3. 3Weizmann Institute of Science
  4. 4Faculty of Physics, University of Vienna, 1090 Wien, Strudlhofgasse 4
  5. 5Department of Materials, Loughborough University, Epinal Way, Leicestershire, United Kingdom, LE11 3TU
  6. 6Thermo Fisher Scientific, Vlastimila Pecha 12, Brno, Czech Republic, 62700
  7. 7Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technicka 5, Prague, Czech Republic, 16628
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Abstract

WS2@ReSe2 core–shell nanotubes were synthesized by van der Waals epitaxy, representing the first highly crystalline nanotubular architecture incorporating ReSe2. High-resolution electron microscopy and 4D-STEM diffraction reveal the epitaxial growth of crystalline ReSe2 multilayers that conformally wrap multiwall WS2 nanotubes while maintaining atomically sharp interfaces. Raman and photoluminescence spectroscopy confirm electronic coupling between the constituent phases. Cryogenic low-loss EELS resolves excitonic transitions in both WS2 and ReSe2 and reveals additional interface-localized subgap excitations associated with cavity-confined modes enabled by the hollow nanotube geometry and strongly diameter-dependent. Cathodoluminescence directly visualizes simultaneous emission from both the WS2 core and ReSe2 shell. These findings establish ReSe2 as a new member of the inorganic nanotube family and demonstrate the potential of anisotropic core–shell nanotubes as platforms for investigating strain-induced optoelectronic phenomena. While the work primarily focuses on synthesis and basic characterization, it invites follow-up to explore its application potential in devices, photodetectors, or optoelectronics.

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Cite

BibTeXRIS
BibTeX
@misc{zalesak2026epitaxial,
  title = {{Epitaxial Growth, Electronic Transitions, and Size-Dependent Cavity Modes of WS2@ReSe2 Core–Shell Nanotubes}},
  author = {Jakub Zalesak and Lothar Houben and Vjosa Hoda and Ramon Pinna Brito and Emil Parth and Stuart Robertson and Zhaoxia Zhou and Kristyna Bukvisova and Zdenek Sofer and Thomas Pichler and Paola Ayala and Vojtech Kundrat},
  howpublished = {ChemRxiv},
  year = {2026},
  month = sep,
  doi = {10.26434/chemrxiv.15008798/v1},
  url = {https://chemrxiv.org/doi/full/10.26434/chemrxiv.15008798/v1},
  note = {CC BY},
}
RIS
TY  - UNPB
TI  - Epitaxial Growth, Electronic Transitions, and Size-Dependent Cavity Modes of WS2@ReSe2 Core–Shell Nanotubes
AU  - Jakub Zalesak
AU  - Lothar Houben
AU  - Vjosa Hoda
AU  - Ramon Pinna Brito
AU  - Emil Parth
AU  - Stuart Robertson
AU  - Zhaoxia Zhou
AU  - Kristyna Bukvisova
AU  - Zdenek Sofer
AU  - Thomas Pichler
AU  - Paola Ayala
AU  - Vojtech Kundrat
PY  - 2026
DA  - 2026/09/14
PB  - ChemRxiv
DO  - 10.26434/chemrxiv.15008798/v1
UR  - https://chemrxiv.org/doi/full/10.26434/chemrxiv.15008798/v1
AB  - WS2@ReSe2 core–shell nanotubes were synthesized by van der Waals epitaxy, representing the first highly crystalline nanotubular architecture incorporating ReSe2. High-resolution electron microscopy and 4D-STEM diffraction reveal the epitaxial growth of crystalline ReSe2 multilayers that conformally wrap multiwall WS2 nanotubes while maintaining atomically sharp interfaces. Raman and photoluminescence spectroscopy confirm electronic coupling between the constituent phases. Cryogenic low-loss EELS resolves excitonic transitions in both WS2 and ReSe2 and reveals additional interface-localized subgap excitations associated with cavity-confined modes enabled by the hollow nanotube geometry and strongly diameter-dependent. Cathodoluminescence directly visualizes simultaneous emission from both the WS2 core and ReSe2 shell. These findings establish ReSe2 as a new member of the inorganic nanotube family and demonstrate the potential of anisotropic core–shell nanotubes as platforms for investigating strain-induced optoelectronic phenomena. While the work primarily focuses on synthesis and basic characterization, it invites follow-up to explore its application potential in devices, photodetectors, or optoelectronics.
ER  -