National Center for Materials Study and Testing, Technical University of Moldova, Block 1, Bulevardul Stefan cel Mare si Sfînt 168, Chisinău 2004, Moldova.
Institute of Electronic Engineering and Nanotechnologies, Academy of Sciences of Moldova, Stefan cel Mare av. 1, MD-2001 Chisinau, Republic of Moldova.
Sci Rep. 2016 Sep 12;6:32913. doi: 10.1038/srep32913.
In present work, the nano- and microscale tetrapods from zinc oxide were integrated on the surface of Aerographite material (as backbone) in carbon-metal oxide hybrid hierarchical network via a simple and single step magnetron sputtering process. The fabricated hybrid networks are characterized for morphology, microstructural and optical properties. The cathodoluminescence investigations revealed interesting luminescence features related to carbon impurities and inherent host defects in zinc oxide. Because of the wide bandgap of zinc oxide and its intrinsic defects, the hybrid network absorbs light in the UV and visible regions, however, this broadband photoabsorption behavior extends to the infrared (IR) region due to the dependence of the optical properties of ZnO architectures upon size and shape of constituent nanostructures and their doping by carbon impurities. Such a phenomenon of broadband photoabsorption ranging from UV to IR for zinc oxide based hybrid materials is novel. Additionally, the fabricated network exhibits strong visible light scattering behavior. The developed Aerographite/nanocrystalline ZnO hybrid network materials, equipped with broadband photoabsorption and strong light scattering, are very promising candidates for optoelectronic technologies.
在目前的工作中，通过简单的一步磁控溅射工艺，将氧化锌的纳米和微四足体集成在 Aerographite 材料（作为骨架）的表面上，形成碳-金属氧化物混合分层网络。制备的混合网络的形貌、微观结构和光学性质进行了表征。阴极发光研究揭示了与碳杂质和氧化锌固有本征缺陷相关的有趣发光特征。由于氧化锌的宽带隙及其本征缺陷，混合网络在紫外和可见光区域吸收光，但由于 ZnO 结构的光学性质取决于组成纳米结构的大小和形状及其对碳杂质的掺杂，这种宽带光吸收行为扩展到红外（IR）区域。基于氧化锌的混合材料具有从紫外到红外的宽带光吸收的这种现象是新颖的。此外，所制备的网络表现出强可见光散射行为。具有宽带光吸收和强光散射的开发的 Aerographite/纳米晶 ZnO 混合网络材料是光电技术非常有前途的候选材料。
