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Bias-Enhanced Optical pH Response of Group III-Nitride Nanowires

Identifieur interne : 001F97 ( Main/Repository ); précédent : 001F96; suivant : 001F98

Bias-Enhanced Optical pH Response of Group III-Nitride Nanowires

Auteurs : RBID : Pascal:13-0051767

Descripteurs français

Pascal (Inist)
- pH, Nanofil, Nanomatériau, Photoluminescence, Semiconducteur III-V, Composé III-V, Electrolyte, Recombinaison non radiative, Processus recombinaison, Transition interbande, Nanophotonique, pHmétrie, Capteur chimique, Nitrure de gallium, Nitrure d'indium, GaN, InGaN, 8107V, 8107B, 7867, 0707D.

English descriptors

KwdEn :
- Chemical sensors, Electrolytes, Gallium nitride, III-V compound, III-V semiconductors, Indium nitride, Interband transitions, Nanophotonics, Nanostructured materials, Nanowires, Non radiative recombination, Photoluminescence, Recombination process, pH metering, pH value.

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.

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Le document en format XML

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<author><name sortKey="Wallys, Jens" uniqKey="Wallys J">Jens Wallys</name>
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<country>Allemagne</country>
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<author><name sortKey="Teubert, Jorg" uniqKey="Teubert J">Jorg Teubert</name>
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<author><name sortKey="Furtmayr, Florian" uniqKey="Furtmayr F">Florian Furtmayr</name>
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<author><name sortKey="Eickhoff, Martin" uniqKey="Eickhoff M">Martin Eickhoff</name>
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<front><div type="abstract" xml:lang="en">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.</div>
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Bias-Enhanced Optical pH Response of Group III-Nitride Nanowires

Bias-Enhanced Optical pH Response of Group III-Nitride Nanowires

Descripteurs français

English descriptors

Abstract

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Le document en format XML

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