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Cubic SnGe nanoalloys: beyond thermodynamic composition limit
Karthik Ramasamy1, Paul G Kotula, Norman Modine
1Center for Integrated Nanotechnologies, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545, USA. karthik@ubiqd.com ivanov@lanl.gov.
Chemical Communications (Cambridge, England)
|February 14, 2019
Summary
Researchers developed a new method to create tin-germanium alloy nanocrystals. These homogeneous SnxGe1-x nanocrystals are suitable for optoelectronics, thermoelectrics, and battery applications.
Area of Science:
- Materials Science
- Nanotechnology
- Solid-State Chemistry
Background:
- Tin-germanium (Sn-Ge) alloys show promise for optoelectronic, thermoelectric, and Li/Na-ion battery applications.
- Synthesizing homogeneous Sn-Ge alloys is difficult due to lattice mismatch in bulk materials.
Purpose of the Study:
- To develop a facile synthetic method for homogeneous SnxGe1-x alloy nanocrystals.
- To overcome the lattice incompatibility challenge in bulk Sn and Ge.
Main Methods:
- Exploiting the strain tolerance of nanosized crystals.
- Developing a facile synthetic approach for alloy nanocrystal formation.
Main Results:
- Achieved homogeneous SnxGe1-x alloy nanocrystals with tunable compositions.
- Compositions ranged from pure Ge to 95% Sn.
- Maintained the cubic crystal structure across the composition range.
Conclusions:
- The developed method enables the synthesis of Sn-Ge alloy nanocrystals with controlled compositions.
- These nanocrystals are promising for advanced material applications, including batteries and optoelectronics.
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