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Janus Doping of Sulfur into Platinum Diselenide Ribbons
Zechen Li1, Honglin Wang1, Huaipeng Wang2
1State Key Lab of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China.
Small Methods
|August 24, 2024
Summary
Sulfur doping of 2D platinum diselenide (PtSe2) creates Janus PtSSe structures. This novel material exhibits enhanced electrical properties and nonlinear optical responses, opening new avenues for advanced electronic devices.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- 2D platinum diselenide (PtSe2) is a transition metal dichalcogenide (TMDC) with promising properties for electronics.
- Doping is crucial for tuning the electrical characteristics of 2D TMDCs.
- Limited research exists on doping 2D PtSe2.
Purpose of the Study:
- To achieve controllable sulfur (S) doping in 2D PtSe2.
- To investigate the structural and property modifications induced by S doping.
- To explore the potential of Janus PtSSe structures.
Main Methods:
- Chemical vapor deposition (CVD) growth of 2D PtSe2 ribbons with sulfur powder.
- Substitutional doping of sulfur into the PtSe2 lattice.
- Analysis of structural changes, electrical properties, and optical responses.
Main Results:
- Successful substitutional doping of sulfur into 2D PtSe2, forming Janus PtSSe.
- Gold substrate facilitates the formation of the Janus structure by reducing substitution energy.
- S-doped PtSe2 ribbons exhibit symmetry breaking, enhanced electrical properties, and strong nonlinear optical effects.
- Demonstrated synaptic plasticity, simulating neuromorphic processes.
Conclusions:
- A viable method for controllable doping of 2D PtSe2 is established.
- Janus PtSSe structures show significant potential for advanced electronic and neuromorphic applications.
- This work provides a platform for exploring other Janus TMDCs.
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