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

DOI: 10.1021/acsami.7b00777

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.

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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://dx.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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