Interplay of Internal Structure and Interfaces on the Emitting Properties of Hybrid ZnO Hierarchical Particles
Distaso M, Bertoni G, Todisco S, Marras S, Gallo V, Manna L, Peukert W (2017)
Publication Status: Published
Publication Type: Journal article, Original article
Publication year: 2017
Journal
Publisher: American Chemical Society
Book Volume: 9
Pages Range: 15182-15191
Journal Issue: 17
Abstract
The design of hybrid organic/inorganic nanostructures with controlled assembly drives the development of materials with new or improved properties and superior performances. In this paper, the surface and internal structure of hybrid ZnO poly-N-vinylpyrrolidone (ZnO/PVP) mesocrystals are investigated in detail and correlated with their emitting properties. A photoluminescence study at room temperature reveals that the as-synthesized particles show a remarkable ultraviolet (UV) emission, whereas an emission from defects in the visible region is not observed. On the other hand, a visible emission is achieved upon calcination of the hybrid ZnO/PVP particles in air, and its intensity is found to increase with the calcination temperature and, in some cases, to overwhelm the UV emission. A molecular description is proposed for the absence of a visible emission from defects in the as-synthesized ZnO/PVP mesocrystals on the basis of Fourier transform infrared (FTIR) and solid-state (13)C NMR (SSNMR) spectroscopy. An in-depth electron microscopy study sheds light on the internal organization of mesocrystals and reveals the formation of nanoreactors, that is, particles with enclosed porosity, upon thermal treatment.
Authors with CRIS profile
Monica Distaso
Lehrstuhl für Partikelsynthese (LFG)
Wolfgang Peukert
Lehrstuhl für Partikelsynthese (LFG)
Additional Organisation(s)
Involved external institutions
Italian Institute of Technology / Istituto Italiano di Tecnologia (IIT)
Italy (IT)
Politecnico di Bari
Italy (IT)
Istituto dei Materiali per l'Elettronica ed il Magnetismo IMEM
Italy (IT)
Italy (IT)
Politecnico di Bari
Italy (IT)
Istituto dei Materiali per l'Elettronica ed il Magnetismo IMEM
Italy (IT)
How to cite
APA:
Distaso, M., Bertoni, G., Todisco, S., Marras, S., Gallo, V., Manna, L., & Peukert, W. (2017). Interplay of Internal Structure and Interfaces on the Emitting Properties of Hybrid ZnO Hierarchical Particles. ACS Applied Materials and Interfaces, 9(17), 15182-15191. https://doi.org/10.1021/acsami.7b00777
MLA:
Distaso, Monica, et al. "Interplay of Internal Structure and Interfaces on the Emitting Properties of Hybrid ZnO Hierarchical Particles." ACS Applied Materials and Interfaces 9.17 (2017): 15182-15191.
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