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Separation of Double-Walled Carbon Nanotubes with Sensitivity to the Electronic Property of the Inner wall

对内壁电子特性敏感的双壁碳纳米管的分离

基本信息

批准号：
281490160
负责人：
Dr. Benjamin Flavel
金额：
--
依托单位：
Material Measurement Laboratory (MML)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2016
资助国家：
德国
起止时间：
2015-12-31 至 2020-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/281490160?language=en
关键词：
Separation Double Walled Carbon Nanotubes

项目摘要

Despite double walled carbon nanotubes (DWCNTs) sharing many of the same unique characteristics of their single-walled counterparts, they also have an additional suite of potential advantages due to the presence of a second wall, and it are these properties which make them attractive for integration into new devices. For example, it has long been envisaged that DWCNTs could be used in sensors, where the outer wall could be chemically functionalized whilst leaving the inner wall in its pristine state and available for signal transduction. However, the realization of these goals has so far been limited by the same challenge experienced by the single-walled carbon nanotube (SWCNT) community, namely, the inherent heterogeneity of raw, as-produced DWCNT material. Similar to SWCNTs, the constituent walls of a DWCNT can either be semiconducting (S) or metallic (M) and this gives rise to four possible combinations of inner@outer wall, namely; M@M, M@S, S@M and S@S. To date, control over the electronic type of the outer-wall has been achieved, however the ‘holy grail’ remains to prepare DWCNT material with defined inner and outer wall. This project is aimed at addressing this challenge and utilizes scalable solution-processing techniques to prepare large quantities of sorted DWCNTs. Contrary to previous methodologies the proposed techniques are sensitive to the electronic type of a DWCNT (influenced by the combination of inner and outer wall type) and will allow for inner@outer wall selectivity. Furthermore, this project will be selective to not only the electronic type of the inner and outer wall but also their chiral type.

尽管双壁碳纳米管(DWCNT)具有许多与单壁碳纳米管相同的独特特性，但由于第二壁的存在，它们还具有一系列额外的潜在优势，正是这些特性使它们具有集成到新设备中的吸引力。例如，长期以来，人们一直在设想将多壁碳纳米管用于传感器，其中外壁可以进行化学功能化，同时使内壁保持原始状态，并可用于信号转导。然而，到目前为止，这些目标的实现受到了单壁碳纳米管(SWCNT)社区所面临的同样挑战的限制，即原始的、原产的DWCNT材料的固有异质性。与单壁碳纳米管类似，多壁碳纳米管的组成壁可以是半导体的(S)或金属的(M)，这就产生了四种可能的内外壁组合，即M@M、M@S、S@M和S@S。到目前为止，已经实现了对外壁的电子型的控制，然而，制备具有明确的内壁和外壁的多壁碳纳米管材料仍然是“圣杯”。该项目旨在解决这一挑战，并利用可扩展的溶液处理技术来制备大量分类的DWCNT。与以前的方法相反，所提出的技术对DWCNT的电子型(受内壁和外壁类型的组合的影响)很敏感，并且将允许内@外壁的选择性。此外，本项目不仅对内壁和外壁的电子类型有选择性，而且对它们的手性类型也有选择性。