Manipulation, Assembly, and Electronic Properties of Carbon Nanotubes

9802560约翰逊这个实验性的重点研究小组项目致力于碳纳米管的操纵、组装和电子性质。我们的目标是找到用纳米管制造和组装简单电路的方法，并评估其性能。单壁纳米管的样品将由莱斯大学的研究小组和法国蒙彼利埃的CNRS小组合成并提供给这些研究。该实验计划将使用X射线衍射和电子显微镜对样品进行结构表征，探索通过化学掺杂改变电子性能，并利用先进的电子显微镜和扫描探针操作开发新的分离、操作和组装纳米管衍生结构的协议。将开发与管子衍生结构建立电接触的新方法。对这些结构中的电子现象的理论研究将侧重于了解管团和管束中的管间相互作用的影响，以及管间的接触和连接对实验观察到的电子性质的影响。这一研究项目本质上是跨学科的，涉及一名或多名博士后和研究生，他们接受了为在工业、政府实验室或学术界就业做准备的出色培训。这个实验性的重点研究小组项目致力于探索如何从“纳米管”制造纳米级的电子器件。纳米管是由碳原子组成的中空圆柱体，它们以类似于石墨(铅笔芯)中的化学键排列。纳米管与“巴基球”密切相关，“巴基球”是由60个碳原子组成的中空球，排列方式类似于(纳米级)足球。纳米是十亿分之一米，或者说大约10个原子直径，或者大约是人类头发直径的20百万分之一。纳米管是电导体，被认为具有未来纳米级电子技术的潜力。本研究项目致力于碳纳米管的操纵、组装和电学性质。我们的目标是找到用纳米管制造和组装简单电路的方法，并评估其性能。单壁纳米管的样品将由莱斯大学的研究小组和法国蒙彼利埃的CNRS小组合成并提供给这些研究。该实验计划将使用X射线衍射和电子显微镜对样品进行结构表征，探索通过化学掺杂改变电子性能，并利用先进的电子显微镜和扫描探针操作开发新的分离、操作和组装纳米管衍生结构的协议。将开发与管子衍生结构建立电接触的新方法。对这些结构中的电子现象的理论研究将侧重于了解管团和管束中的管间相互作用的影响，以及管间的接触和连接对实验观察到的电子性质的影响。这一研究项目本质上是跨学科的，涉及一名或多名博士后和研究生，他们接受了为在工业、政府实验室或学术界就业做准备的出色培训。***

w:\awards\awards96\*.doc 9802560 Johnson This experimental focused research group project is devoted to manipulation, assembly and electronic properties of carbon nanotubes. The goals are to find ways to fabricate and assemble simple circuits from nanotubes, and to assess the properties. Samples of single wall nanotubes will be synthesized and supplied for these studies by research groups at Rice University and the CNRS group at Montpellier, France. The experimental program will structurally characterize samples using X-ray diffraction and electron microscopy, explore modification of the electronic properties by chemical doping, and develop new protocols for separation, manipulation, and assembly of nanotube-derived structures using advanced electron microscopy and scanning probe manipulation. New methods for establishing electrical contact to tube-derived structures will be developed. Theory of the electronic phenomena in these structures willl be studied with an emphasis on understanding the effects of intertube interactions in tube clusters and tube bundles, and the effects of contacts and linkages between tubes on the experimentally observed electronic properties. This research program is interdisciplinary in nature and involves one or more postdoctoral and graduate students, who receive excellent training in preparation for careers in industry, government laboratories or academia. %%% This experimental focused research group project seeks to explore ways of making nano-meter -scale electron devices from "nanotubes". Nanotubes are hollow cylinders of carbon atoms, arranged in chemical bonds similar to those in graphite (pencil lead). Nanotubes are closely related to "buckyballs", which are hollow balls composed of 60 carbon atoms, arranged in a fashion resembling a (nano-meter-scale) soccer ball. A nanometer is one bil lionth of a meter, or about 10 atomic diameters or about 20 millionths of the diameter of a human hair. Nanotubes are electrical conductors and are considered to have potential for a nano-meter scale electronics technology of the future. This research project is devoted to manipulation, assembly and electronic properties of carbon nanotubes. The goals are to find ways to fabricate and assemble simple circuits from nanotubes, and to assess the properties. Samples of single wall nanotubes will be synthesized and supplied for these studies by research groups at Rice University and by the CNRS group at Montpellier, France. The experimental program will structurally characterize samples using X-ray diffraction and electron microscopy, explore modification of the electronic properties by chemical doping, and develop new protocols for separation, manipulation, and assembly of nanotube-derived structures using advanced electron microscopy and scanning probe manipulation. New methods for establishing electrical contact to tube-derived structures will be developed. Theory of the electronic phenomena in these structures willl be studied with an emphasis on understanding the effects of intertube interactions in tube clusters and tube bundles, and the effects of contacts and linkages between tubes on the experimentally observed electronic properties. This research program is interdisciplinary in nature and involves one or more postdoctoral and graduate students, who receive excellent training in preparation for careers in industry, government laboratories or academia. ***