Germanium disulfide (GeS2, CAS 12025-34-2) is a layered group IV metal dichalcogenide supplied by Ossila as a powder (≥99.995% purity) or as bulk crystals (≥99.999% purity). This black, anisotropic van der Waals semiconductor is grown synthetically by chemical vapor transport and has a monoclinic structure with a bandgap of 2.265 eV.
Bulk crystals serve as a source for producing monolayer and few-layer GeS2 sheets through mechanical or liquid exfoliation, and are offered in small (≥10 mm2) and medium (≥25 mm2) sizes. The powder is suited to liquid exfoliation, typically aided by sonication, to make nanosheets, nanoparticles, nanoplates and ultrathin films. Mechanically exfoliated nanoflakes 4.2 nm thick show strong in-plane anisotropy and have been used in short-wave polarization-sensitive photodetectors.
Research interest centres on energy storage, including electrode materials for solid state and lithium-sulfur batteries, while the wide infrared transmission window of GeS2 supports work in infrared optics and sensing.
- Preparation of monolayer and few-layer GeS2 by mechanical or liquid exfoliation of crystals.
- Liquid exfoliation of powder to produce GeS2 nanosheets, nanoparticles and thin films.
- Research into electrode materials for solid state and lithium-sulfur batteries, including GeS2/rGO hybrid anodes.
- Polarization-sensitive photodetectors operating in the short wave region.
- Infrared applications such as thermal imaging, night vision, chemical sensors and integrated optics.
- Photocatalytic H2 evolution and low energy RRAM device studies.
| Brand | Ossila |
|---|---|
| CAS number | 12025-34-2 |
| Molecular formula | GeS2 |
| Purity | ≥99.995% |
| Category | — |
| Pack sizes | — |
| Physical form | — |
| Storage | — |
- Product code: M2305A25
- Molecular Weight: 136.77 g/mol
- Bandgap: 2.265 eV (monoclinic)
- Preparation: Synthetic - Chemical Vapor Transport (CVT)
- Structure: Monoclinic
- Electronic Properties: 2D semiconductor
- Melting Point: 825 °C (lit.)
- Color: Black
- Synonyms: Germanium(IV) sulfide
- Crystal Purity: ≥99.999%
- Crystal Sizes: Small (≥10 mm2) or medium (≥25 mm2)
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