NER: Fabrication of an Integrated Structure of 3D Macroporous Silica and Carbon Nanotubes

NER：3D 大孔二氧化硅和碳纳米管集成结构的制造

• 批准号: 0210195
• 负责人: Henry Du
• 金额: $ 9.59万
• 依托单位: Stevens Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-08-01 至 2004-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0210195&HistoricalAwards=false
• 关键词: NER; Fabrication; Integrated; Structure; 3D

PROPOSAL NO.: CTS-0210195PRINCIPAL INVESTIGATORS: HENRY DUINSTITUTION: STEVENS INSTITUTE OF TECHNOLOGYABSTRACT: 3D porous materials with highly ordered interconnecting pores and carbon nanotubes are at the frontier of science and engineering. This Nanoscale Exploratory Research (NER) proposal aims to integrate these two areas by exploring aligned growth of carbon nanotubes on the pore walls of high-surface-area microporous silica. Several tasks are being pursued to achieve the proposed goal. Specifically, equilibrium-driven colloidal self-assembly processes as well as colloidal epitaxy on ultra-fine TEM grids is being used to obtain opals of polystyrene spheres as structural templates. A sol-gel route is being employed for effective infiltration of the templates to produce inverted silica opals upon subsequent thermal decomposition of the template opals. A synthesis strategy is also being developed for deposition of uniform, nanometer-sized, catalytic cobalt particles on the pore walls. The approach is being used to grow aligned carbon nanotubes on the pore walls throughout the volume of the macroporous silica using plasma-enhanced chemical vapor deposition. This project represents the first known attempt to fabricate an integrated structure composed of 3D macroporous materials and carbon nanotubes. Critical challenges are being addressed related to the deposition of cobalt particles and the controlled growth of aligned carbon nanotubes on pore walls. The integration of the two aspects of this work will yield potentially robust structures for applications where an abundance of nanotube arrays is needed for system efficiency. Such applications include entrapment of DNA and proteins, catalytic supports, desalination of seawater, and hydrogen storage for fuel cells. Knowledge generated in this investigation can be extended to the fabrication of other 3D macroporous materials, such as semiconductors. The success of the project thus offers exciting prospects for the exploration of carbon nanotubes for applications in the nanotechnology arena and across science and engineering.

提案编号：CTS-0210195 主要研究员：HENRY DU 机构：史蒂文斯理工学院 摘要：具有高度有序互连孔和碳纳米管的 3D 多孔材料处于科学和工程的前沿。 该纳米探索性研究（NER）提案旨在通过探索碳纳米管在高表面积微孔二氧化硅孔壁上的对齐生长来整合这两个领域。 为了实现拟议的目标，正在开展多项任务。 具体来说，平衡驱动的胶体自组装过程以及超细 TEM 网格上的胶体外延可用于获得聚苯乙烯球蛋白石作为结构模板。 采用溶胶-凝胶途径有效渗透模板，在模板蛋白石随后热分解时产生反相二氧化硅蛋白石。 还正在开发一种合成策略，用于在孔壁上沉积均匀的纳米尺寸催化钴颗粒。 该方法用于使用等离子体增强化学气相沉积在整个大孔二氧化硅体积的孔壁上生长排列的碳纳米管。该项目代表了已知的首次尝试制造由 3D 大孔材料和碳纳米管组成的集成结构。 正在解决与钴颗粒沉积和孔壁上定向碳纳米管的受控生长相关的关键挑战。 这项工作的两个方面的整合将为需要大量纳米管阵列以提高系统效率的应用产生潜在的稳健结构。 此类应用包括 DNA 和蛋白质的捕获、催化载体、海水淡化以及燃料电池的储氢。 这项研究中产生的知识可以扩展到其他 3D 大孔材料（例如半导体）的制造。 因此，该项目的成功为探索碳纳米管在纳米技术领域以及跨科学和工程的应用提供了令人兴奋的前景。