Novel Photoluminescence Properties of Surface-Modified Nanocrystalline Zinc Oxide: Toward a Reactive Scaffold
| Autor: | Diane M. Steeves, James E. Whitten, Jason W. Soares, Daniel W. Oblas |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Photoluminescence
Chemistry Infrared spectroscopy chemistry.chemical_element Surfaces and Interfaces Zinc Condensed Matter Physics Photochemistry Silane Nanocrystalline material chemistry.chemical_compound Nanocrystal X-ray photoelectron spectroscopy Electrochemistry General Materials Science Fourier transform infrared spectroscopy Spectroscopy |
| Zdroj: | Langmuir. 24:371-374 |
| ISSN: | 1520-5827 0743-7463 |
| DOI: | 10.1021/la702834w |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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