Optical gas sensing by micro‐photoluminescence on multiple and single ZnO nanowires. Issue 8 (18th March 2015)

• Record Type: Journal Article
• Authors: Madel, Manfred; Jakob, Julian; Huber, Florian; Neuschl, Benjamin; Bauer, Sebastian; Xie, Yong; Tischer, Ingo; Thonke, Klaus
• Is Part Of: Physica status solidi. Volume 212:Issue 8(2015:Aug.)
• Page Start: 1810
• Page End: 1816
• Publication Date: 2015-03-18
• Subjects: Solid state physics -- Periodicals; Solids -- Industrial applications -- Periodicals; 530.41
• DOI: 10.1002/pssa.201431688
• Languages: English
• ISSNs: 1862-6300

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <sec id="pssa201431688-sec-0001" sec-type="section"> <p>ZnO nanowires with average diameters of 50–200 nm were grown by chemical vapor deposition. Their gas sensing properties were analyzed by micro‐photoluminescence spectroscopy allowing for optical readout. The influence of <inline-formula><alternatives><inline-graphic mimetype="image" xlink:href="ark:/27927/pgj2dckcq72" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /><mml:math altimg="urn:x-wiley:15213951:media:pssa201431688:pssa201431688-math-0001" display="inline" overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math></alternatives></inline-formula> atmosphere on the emission intensity was investigated for ZnO nanowires with different metal cover layers and after <inline-formula><alternatives><inline-graphic mimetype="image" xlink:href="ark:/27927/pgj2dckcq8m" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /><mml:math altimg="urn:x-wiley:15213951:media:pssa201431688:pssa201431688-math-0002" display="inline" overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math></alternatives></inline-formula> plasma pre‐treatment. Investigations of single ZnO nanowires showed an improved sensitivity towards <inline-formula><alternatives><inline-graphic mimetype="image" xlink:href="ark:/27927/pgj2dckcrk3" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /><mml:math altimg="urn:x-wiley:15213951:media:pssa201431688:pssa201431688-math-0003" display="inline" overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math></alternatives></inline-formula>.<inline-graphic xlink:href="ark:/27927/pgj2dckc6nx" content-type="pssa201431688-gra-0001" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /></p> <p>Photoresponse of a single ZnO nanowire (inset) to <inline-formula><alternatives><inline-graphic mimetype="image" xlink:href="ark:/27927/pgj2dckcrh0" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /><mml:math altimg="urn:x-wiley:15213951:media:pssa201431688:pssa201431688-math-0004" display="inline" overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math></alternatives></inline-formula> ambient.</p> </sec> </abstract>