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Structural and Optical Modification of Siloxene Nanosheets Driven by Selenium Doping.

Nikolaos Moscholakis1, Iosif Tantis2, Georgia Potsi3

  • 1Department of Chemistry, University of Crete Voutes, Heraklion, 70013, Greece.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|June 16, 2025
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Summary

Selenium doping enhances siloxene nanosheets, narrowing their bandgap for improved optoelectronic properties. This research advances two-dimensional silicon materials for next-generation sensors and electronics.

Keywords:
2D materialsbandgapdopingpurificationsiloxene nanosheetsxenes

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Solid State Physics

Background:

  • Two-dimensional (2D) nanomaterials offer unique electronic and optical properties.
  • Siloxene nanosheets are promising due to their structure, synthesis, and semiconducting nature.

Purpose of the Study:

  • To investigate selenium doping as a method to tune the optoelectronic properties of siloxene nanosheets.
  • To explore the potential of modified siloxene for advanced technological applications.

Main Methods:

  • Synthesis of silicon nanosheets via topochemical deintercalation of CaSi₂.
  • Selenium incorporation using thermal evaporation.
  • Structural and spectroscopic analyses to confirm doping and material integrity.

Main Results:

  • Successful integration of selenium atoms into the 2D siloxene framework.
  • Observation of significant bandgap narrowing in selenium-doped siloxene.
  • Preservation of the nanosheet structure after doping.

Conclusions:

  • Selenium doping is an effective strategy for modulating siloxene's electronic and optical characteristics.
  • Doped siloxene shows potential for applications in sensing, optoelectronics, and catalysis.
  • This work expands the utility of 2D silicon-based materials in advanced technologies.