NER: High Volume Chemical Syntheses of SWNTs with Uniform, Tunable Properties

NER：具有均匀、可调特性的单壁碳纳米管的大批量化学合成

• 批准号: 0403954
• 负责人: Glen Miller
• 金额: $ 10万
• 依托单位: University of New Hampshire
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-07-01 至 2006-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0403954&HistoricalAwards=false
• 关键词: NER; Volume; Chemical; Syntheses; SWNTs

The objective of this research is to develop a high-volume chemical synthesis of single-walled nanotubular molecules with uniform but tunable dimensions and properties. The approach is a two-stage chemical synthesis. In the first stage, C60 molecules add in a diastereoselective syn fashion across large, phenyl substituted acenes to produce cyclacene (i.e., cyclic acene) molecules with variable diameters. Cyclacene molecules map directly onto zig-zag carbon nanotubes. In the second stage, the cyclacenes are iteratively oligomerized to form single-walled nanotubular molecules with variable lengths. This research is important because it offers a means to prepare uniform batches of single-walled nanotubular molecules. While single-walled carbon nanotubes hold great promise in a variety of technological applications including chemical and biological sensors, efficient energy storage (e.g., gas and battery applications), nanoscale electronics (e.g., one-dimensional quantum wires in nanocircuitry; nanotransistors), nanoscale electromechanical systems (i.e., NEMS), novel actuators, multifunctional materials (e.g., lightweight, high strength, energy efficient, electrically conducting, etc.) and advanced instrumentation (e.g., AFM, STM and CFM probe tips), current carbon nanotube fabrication techniques produce a myriad of different nanotubes possessing different lengths, diameters, shapes and properties. The absence of uniform batches of carbon nanotubes hinders the development of these important technologies. Additionally, the single-walled nanotubular molecules to be prepared in this high-volume chemical synthesis should be amenable to facile chemical functionalization. Appropriately functionalized single-walled nanotubular molecules can selectively bind one agent (chemical or biological) in the presence of others, thereby improving and expanding their application as chemical and biological sensors.

本研究的目的是开发一种高容量的化学合成的单壁纳米管分子均匀，但可调的尺寸和性能。 该方法是一个两阶段的化学合成。 在第一阶段中，C60分子以非对映选择性顺式方式加成到大的苯基取代的并苯上以产生环并苯（即，环并苯）分子。 环并苯分子直接映射到锯齿形碳纳米管上。 在第二阶段中，环并苯反复低聚以形成具有可变长度的单壁纳米管分子。这项研究很重要，因为它提供了一种制备均匀批次的单壁纳米管分子的方法。 虽然单壁碳纳米管在化学和生物传感器、高效储能（例如，气体和电池应用），纳米级电子器件（例如，纳米电路中的一维量子线;纳米晶体管），纳米级机电系统（即，NEMS）、新型致动器、多功能材料（例如，重量轻、强度高、节能、导电等）以及先进的仪器（例如，AFM、STM和CFM探针尖端），目前的碳纳米管制造技术产生了无数具有不同长度、直径、形状和性质的不同纳米管。 缺乏均匀的碳纳米管批次阻碍了这些重要技术的发展。 此外，在这种高容量化学合成中制备的单壁纳米管分子应该易于进行化学官能化。 适当官能化的单壁纳米管分子可以在存在其他试剂的情况下选择性地结合一种试剂（化学或生物），从而改善和扩展其作为化学和生物传感器的应用。