Zhongfen An, Yan Shen, Xiangang Xu, Feng Shi, Fuzhou Song, Yingbo Yu, Jingxuan Dong, Yue Xu, Lingcui Zhang, Jinbo Zhao
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引用次数: 0
Abstract
One-dimensional nanostructures, especially those with high aspect ratios, are suitable materials for fabricating field emitters. Indium tin oxide (ITO) nanorod thin films were successfully synthesized on GaAs substrates using electron beam physical vapor deposition. Subsequently, the morphologies and crystal structures of the samples were analyzed in detail. Characterizations showed that the nanorods were 30.06–49.20 nm in diameter with highly crystalline cubic indium oxide structures. The electrical properties, field emission characteristics, and stability of the samples were measured, exhibiting the conductivity of a semiconductor. The field emission threshold electric field of the samples was about 5.72 V/µm when the current density was 0.01 mA/cm2, and the maximum current density was 0.937 mA/cm2 when the electric field was 14.19 V/µm. The fluctuation of field emission electric current was less than 7%, implying that a stable current density was emitted. That is, good field emission characteristics were obtained in the ITO nanorod thin film samples. Finally, the growth mechanism of the samples was analyzed in brief based on the vapor–liquid-solid (VLS) synthesis.
期刊介绍：
The objective of the Journal of Nanoparticle Research is to disseminate knowledge of the physical, chemical and biological phenomena and processes in structures that have at least one lengthscale ranging from molecular to approximately 100 nm (or submicron in some situations), and exhibit improved and novel properties that are a direct result of their small size.
Nanoparticle research is a key component of nanoscience, nanoengineering and nanotechnology.
The focus of the Journal is on the specific concepts, properties, phenomena, and processes related to particles, tubes, layers, macromolecules, clusters and other finite structures of the nanoscale size range. Synthesis, assembly, transport, reactivity, and stability of such structures are considered. Development of in-situ and ex-situ instrumentation for characterization of nanoparticles and their interfaces should be based on new principles for probing properties and phenomena not well understood at the nanometer scale. Modeling and simulation may include atom-based quantum mechanics; molecular dynamics; single-particle, multi-body and continuum based models; fractals; other methods suitable for modeling particle synthesis, assembling and interaction processes. Realization and application of systems, structures and devices with novel functions obtained via precursor nanoparticles is emphasized. Approaches may include gas-, liquid-, solid-, and vacuum-based processes, size reduction, chemical- and bio-self assembly. Contributions include utilization of nanoparticle systems for enhancing a phenomenon or process and particle assembling into hierarchical structures, as well as formulation and the administration of drugs. Synergistic approaches originating from different disciplines and technologies, and interaction between the research providers and users in this field, are encouraged.
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