Flame Synthesis of Metal-Oxide/Carbide Nanowires

金属氧化物/碳化物纳米线的火焰合成

• 批准号: 0755615
• 负责人: Stephen Tse
• 金额: $ 5万
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-10-01 至 2010-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0755615&HistoricalAwards=false
• 关键词: Flame; Synthesis; Metal; Oxide; Carbide

CBET-0755615TseThe goal is this research is to explore and establish the relationship between flame-synthesis conditions and growth behavior of nanowires. It will work from the hypothesis that for a given substrate material, growth-rate, crystal structure, and nanowire morphologies such as wires vs. ribbons are determined by the local gas-phase temperature, substrate temperature, and gas-phase species. In previous work, the PI has developed a novel combustion-based technique to synthesize monocrystalline oxide and carbide nanowires directly from microsized metal grains at high rates under atmospheric conditions. The present research would combine empirical characterization of different flame-synthesized nanowires with steps to achieve fundamental understanding of their formation. A large number of metal oxide/carbide nanowires will be synthesized using using a counter-flow diffusion flame and an inserted probe substrate characterized laser-based diagnostics. Oxide and carbide synthesis will be investigated for the three base metals Al, Fe, and W. Over the past half-decade, research in functional oxide-based one-dimensional nanostructures has attracted considerable attention due to their unique and innovative applications in optics, optoelectronics, catalysis, and piezoelectricity. Semiconducting oxide nanowires constitute a special set of 1D nanomaterials that have a distinct and uniform geometrical shape, a controlled crystallographic and surface structure, environmentally hardy and stable surfaces, and a dislocation-free single-crystal volume. A variety of applications including field-effect transistors, ultra-sensitive nano-size gas sensors, nanoresonators, and nanocantilevers become realizable based on these nanostructures. Beyond these potential technological impacts, broader impacts of the proposed work arise through education of the graduate researchers and incorporation of this work into nanomaterials and advanced diagnostics courses. The work will also further ongoing industry partnerships and will allow students access to industry facilities and opportunities for collaboration.

CBET-0755615Tse 这项研究的目标是探索和建立火焰合成条件与纳米线生长行为之间的关系。 其工作原理是，对于给定的基底材料，生长速率、晶体结构和纳米线形态（例如线与带）由局部气相温度、基底温度和气相种类决定。 在之前的工作中，PI 开发了一种基于燃烧的新型技术，可在大气条件下直接从微米级金属晶粒高速合成单晶氧化物和碳化物纳米线。目前的研究将结合不同火焰合成纳米线的经验表征和实现对其形成的基本了解的步骤。将使用逆流扩散火焰和插入探针基板来合成大量金属氧化物/碳化物纳米线，该探针基板具有基于激光的诊断功能。 将研究三种贱金属 Al、Fe 和 W 的氧化物和碳化物合成。在过去的五年中，功能性氧化物基一维纳米结构的研究由于其在光学、光学、光学、光学、光学、光学、光学、光学、光学、光学、光学、光学、光学、电子、光学、电子、电子、电子、电子、电子、电子、电子、电子、电子、电子、电子、电子、电子、电子、电子、电子、电子、电子、电子、电子、电子、电子、电子、电子、电子、电子、电子、电子、电子、电子、电子、电子、汽车、医疗保健等领域的独特和创新应用而引起了人们的广泛关注。光电子学、催化和压电。半导体氧化物纳米线构成了一组特殊的一维纳米材料，具有独特且均匀的几何形状、受控的晶体学和表面结构、耐环境且稳定的表面以及无位错的单晶体积。基于这些纳米结构，包括场效应晶体管、超灵敏纳米尺寸气体传感器、纳米谐振器和纳米悬臂梁在内的各种应用都可以实现。 除了这些潜在的技术影响之外，通过研究生研究人员的教育以及将这项工作纳入纳米材料和高级诊断课程，拟议工作还产生了更广泛的影响。这项工作还将进一步推进正在进行的行业合作伙伴关系，并使学生能够使用行业设施和合作机会。