Special Issue "Zinc Oxide Nanostructures: Synthesis and Characterization"
A special issue of Materials (ISSN 1996-1944).
Deadline for manuscript submissions: closed (30 November 2017)
Prof. Sotirios Baskoutas
Department of Materials Science, University of Patras, Patra, Greece
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Interests: theoretical and computational methods for the study of the electronic and optical properties of semiconducting nanomaterials; synthesis with physical methods; characterization of amorphous and nanocrystalline materials
Among various metal oxide materials, ZnO presents itself as a multifunctional material due to its own properties and functionalities. The properties of ZnO include its wide band gap (3.37 eV), high exciton binding energy (60 meV), biocompatibility, ease of fabrication and so on. Due to its excellent properties, ZnO is widely used for various potential applications such as catalysis, solar cells, ultraviolet (UV) lasers, light emitting diodes, photo-detectors, sensors (chemical, bio- and gas), optical and electrical devices and so on. Among various applications, the use of ZnO nanomaterials as a photocatalyst has particular interest due to their large surface area; wide band gap; ease of fabrication and cost effective synthesis; biocompatible and environmentally benign nature.
More specifically, the nanostructured ZnO semiconductor used as photocatalytic degradation material against environmental pollutants has also been extensively studied, because of its advantages of non-toxic nature, low cost and high reactivity. However, such a photocatalytic degradation only proceeds under UV irradiation because this semiconductor can only absorb UV light. Therefore, ZnO-based materials capable of visible-light photocatalysis are required.
Furthermore, the synthesis of large-scale arrayed 1D ZnO nanostructures, including nanowires, nanorods, nanobelts and whiskers, is an important step for the fabrication of functional nano/microdevices. Recently, because of its high-temperature strength and rigidity, as well as excellent chemical stability, small-diameter ZnO whiskers have received great attention for industrial applications as reinforcement phase in composite materials. ZnO whiskers with high aspect ratio have also been successfully used as a probing tip to develop new precise high-resolution imaging techniques for atomic force microscopy and scanning tunneling microscopy.
Finally, Magnetic ion-doped ZnO quantum dots (QDs) have been targeted as promising candidates for the implementation of novel technologies, such as in spintronic and quantum computation.
Prof. Sotirios Baskoutas
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fine structure splitting