Photoluminescence, thermal transport, and breakdown in joule-heated GaN nanowires.
basic_science · Level V
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- Record sourced from PubMed, PMID 19090697.
- Also identified by DOI 10.1021/nl802840w.
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Abstract
Thermal transport and breakdown in Joule-heated GaN nanowires is investigated using a combination of microphotoluminescence and in situ TEM characterization. The thermal conductivity of the nanowires is estimated to be <80 W/m.K, which is substantially below the bulk GaN value. Catastrophic breakdown in individual nanowires is observed to occur at a maximum temperature of approximately 1000 K, and nanowire morphology near the breakdown region indicates that failure occurs via thermal decomposition, a conclusion that is validated by in situ TEM images obtained during the failure process.
Medical subject headings
- Crystallization
- Gallium
- Luminescent Measurements
- Models, Chemical
- Nanotechnology
- Nanotubes