TEM Study of Growth Mechanism and Production of Carbon Nanotubes

9302353色拉芬这个项目涉及被称为纳米管的微米长石墨纤维的研究。与最初观察到的球状富勒烯(如C60)相比，这些纳米管显示出不同的形状。本项目的目标是：1)通过电子显微镜研究纳米管的形貌和产量与工艺参数之间的关系；2)纳米管的生长机理，目的是控制碳六边形和五边形在管子和端件的圆柱形几何形状中的复杂平衡，并定制出所需的长径比；以及3)纳米管在电子束和加热和冷却时的稳定性和结构变化。这一研究将为管状碳团簇的纳米工程奠定基础。该项目对设计合理的纳米管材料具有新的机械和电学性能具有重要的技术意义。***

9302353 Seraphin This project is concerned with the investigation of micron-long graphite fibers called nanotubes. These nanotubes exhibit a different shape compared to the initially observed spherical fullerenes such as C60. The objectives of this project are to study: 1) the correlation between morphology and yield of nanotubes and processing parameters by means of transmission electron microscopy; 2) the growth mechanism of the nanotubes with the aim to control the intricate balance of carbon hexagons and pentagons in the cylindrical geometry of the tubes and end pieces, and to tailor nanotubes of desired length-to-diameter ratio; and 3) stability and structural transformations of nanotubes under the electron beam and in-situ upon heating and cooling. This research will lay the foundations for the nanoscale engineering of the tubular carbon clusters. The project has technological importance with respect to the novel mechanical and electrical properties expected in properly designed nanotube-based materials. ***