Bias-enhanced optical pH response of group III-nitride nanowires.
basic_science · Level V
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- Record sourced from PubMed, PMID 23145491.
- Also identified by DOI 10.1021/nl303021v.
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Abstract
We show that the photoluminescence intensity of GaN and InGaN nanowires in electrolytes sensitively responds to variations of the pH value and the applied bias. The realization of an electrochemical working point allows pH detection with a resolution better than 0.05 pH. The observed effects are attributed to bias-dependent nonradiative recombination processes competing with interband transitions. The results show that group III-nitride nanowires are excellently suited as nanophotonic pH sensor elements.
Medical subject headings
- Gallium
- Indium
- Nanowires