BaO Clusters on MgO Nanocubes: A Quantitative Analysis of Optical-Powder Properties
Sternig A, Mueller M, Mccallum M, Bernardi J, Diwald O (2010)
Publication Type: Journal article
Publication year: 2010
Journal
Book Volume: 6
Pages Range: 582-588
Journal Issue: 4
Abstract
Uniformly sized and shaped nanoparticles are well suited for the quantitative characterization of optical-powder properties. For the first time, quantum yields related to photoluminescence emissions that originate from the photoexcitation of MgO nanocube corners and edges are measured. In addition, the surfaces of these nanoparticles are doped with submonolayer barium, which oxidizes during adsorption onto the MgO nanocrystal surfaces and transforms in O$_2$atmosphere into BaO. UV--Vis diffuse reflectance and photoluminescence spectroscopy is employed to explore whether 10$-$3 monolayer equivalents of these dopants affect the MgO specific optical properties. Surface-admixed BaO produces additional absorption and photoluminescence emission features but does not significantly affect those specific to MgO nanocubes. On this basis the number of optically active sites that can be sampled inside a powder of alkaline earth oxide nanoparticles using a standard spectrometer system is estimated.
Authors with CRIS profile
Additional Organisation(s)
Involved external institutions
Technische Universität Wien / Vienna University of Technology
Austria (AT)
Edinburgh Instruments Ltd
United Kingdom (GB)
Austria (AT)
Edinburgh Instruments Ltd
United Kingdom (GB)
How to cite
APA:
Sternig, A., Mueller, M., Mccallum, M., Bernardi, J., & Diwald, O. (2010). BaO Clusters on MgO Nanocubes: A Quantitative Analysis of Optical-Powder Properties. Small, 6(4), 582-588. https://doi.org/10.1002/smll.200901662
MLA:
Sternig, Andreas, et al. "BaO Clusters on MgO Nanocubes: A Quantitative Analysis of Optical-Powder Properties." Small 6.4 (2010): 582-588.
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