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Work function engineering of SnO single crystal microplates with thermal annealing
Won Hui Doh1, Wooseok Jeong, Hyunsoo Lee
1Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 34141, Korea.
Nanotechnology
|July 9, 2016
Summary
Researchers synthesized black tin(II) oxide (SnO) microplates and tuned their electrical properties through thermal treatments. This work demonstrates a method to engineer the work function of SnO nanostructures.
Area of Science:
- Materials Science
- Nanotechnology
- Solid State Physics
Background:
- Tin(II) oxide (SnO) is a semiconductor with potential applications in electronics.
- Controlling the electronic properties of SnO nanostructures is crucial for device development.
Purpose of the Study:
- To synthesize black SnO single-crystal microplates.
- To engineer the work function of SnO microplates via thermal treatments.
- To investigate the thermal stability and phase transformation of SnO(001) single crystals.
Main Methods:
- Sonochemical synthesis of black SnO single-crystal microplates.
- Thermal annealing treatments in air.
- Transmission electron microscopy (TEM) for structural analysis.
- X-ray absorption spectroscopy (XAS) for chemical state analysis.
- Surface potential measurements for work function determination.
Main Results:
- As-synthesized SnO microplates exhibited a wide (001) plane.
- Work function of SnO microplates was successfully tuned by increasing annealing temperature.
- SnO(001) single crystals remained stable up to approximately 400 °C in air.
- Local surface oxidation began above 400 °C.
- Polycrystalline SnO2 formed at around 600 °C due to changes in long-range ordering and lattice parameters.
Conclusions:
- The work function of SnO microplates can be effectively engineered through controlled thermal treatments.
- SnO(001) single crystals possess thermal stability up to 400 °C in air.
- This study presents a promising approach for tailoring the electrical properties of nanostructures.
