Novel Photoluminescence Properties of Surface-Modified Nanocrystalline Zinc Oxide:  Toward a Reactive Scaffold

Nanocrystalline zinc oxide has been functionalized with 11-triethoxysilylundecal to introduce chemical reactivity for subsequent molecular attachment while preserving its unique photoluminescence (PL) properties. Silane bonding is confirmed using FTIR and photoelectron spectroscopy, with a total Si...

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Veröffentlicht in:Langmuir 2008-01, Vol.24 (2), p.371-374
Hauptverfasser: Soares, Jason W, Whitten, James E, Oblas, Daniel W, Steeves, Diane M
Format: Artikel
Sprache:eng
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Zusammenfassung:Nanocrystalline zinc oxide has been functionalized with 11-triethoxysilylundecal to introduce chemical reactivity for subsequent molecular attachment while preserving its unique photoluminescence (PL) properties. Silane bonding is confirmed using FTIR and photoelectron spectroscopy, with a total Si concentration of 3 to 4 atomic %. PL measurements demonstrate a 2-fold enhancement of its UV peak and maintenance of its visible peak compared to control samples. Enhancement of the UV peak is likely due to a decrease in the surface-dependent nonradiative recombination process. These results lay the framework for sensor fabrication, with the aldehyde groups available to bind analytes that would alter the PL spectrum.
ISSN:0743-7463
1520-5827
DOI:10.1021/la702834w