Plasma-Synthesized Single-Walled Carbon Nanotubes and Their Applications
Plasma-Synthesized Single-Walled Carbon Nanotubes and Their Applications
复制标题
等离子体合成单壁碳纳米管及其应用
DOI：
10.1088/0022-3727/44/17/174004
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
R.Hatakeyama
中科院分区：
文献类型：
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作者：
上門瞳;横手 祐一,關 金一;R.Hatakeyama
基于等离子体的纳米技术是一个快速发展的研究领域，从气体和液体等离子体物理到材料科学，表面科学和纳米纤维。在我们的情况下，纳米等离子体处理进行生长单壁碳纳米管（SWNTs）与控制手性分布，并进一步开发基于SWNTs的材料与相应的电子和生物医学应用的新功能。由于单壁碳纳米管具有中空的内部空间，基于等离子体纳米技术将各种原子和分子注入其纳米空间是非常有趣的。碳纳米管内部的碱金属原子、卤素原子、富勒烯或氮杂富勒烯分子的封装使用正离子和负离子的离子等离子体（例如碱金属富勒烯、碱金属卤素和对或准对离子等离子体）来实现。此外，制备了具有DNA负离子的电解质溶液等离子体，以将DNA分子封装到纳米管中。结果发现，各种封装的单壁碳纳米管的电子和光学性质显着改变与原始的。其结果是，一些有趣的传输现象，如空气稳定的n型和p型行为，p-n结特性，和光诱导电子转移观察。最后，创建一个新兴的单壁纳米管为基础的纳米生物电子系统的挑战。具体来说，提出自下而上的电场辅助反应离子蚀刻来控制单壁碳纳米管的手性，旨在开创尚未探索的单壁碳纳米管的磁性和超导性，并有望通过应用先进的气液界面等离子体开发具有更高级结构的封装单壁碳纳米管的创新生物医学纳米工程。
Plasma-based nanotechnology is a rapidly developing area of research ranging from physics of gaseous and liquid plasmas to material science, surface science and nanofabrication. In our case, nanoscopic plasma processing is performed to grow single-walled carbon nanotubes (SWNTs) with controlled chirality distribution and to further develop SWNT-based materials with new functions corresponding to electronic and biomedical applications. Since SWNTs are furnished with hollow inner spaces, it is very interesting to inject various kinds of atoms and molecules into their nanospaces based on plasma nanotechnology. The encapsulation of alkali-metal atoms, halogen atoms, fullerene or azafullerene molecules inside the carbon nanotubes is realized using ionic plasmas of positive and negative ions such as alkali–fullerene, alkali–halogen, and pair or quasipair ion plasmas. Furthermore, an electrolyte solution plasma with DNA negative ions is prepared in order to encapsulate DNA molecules into the nanotubes. It is found that the electronic and optical properties of various encapsulated SWNTs are significantly changed compared with those of pristine ones. As a result, a number of interesting transport phenomena such as air-stable n-and p-type behaviour, p–n junction characteristic, and photoinduced electron transfer are observed. Finally, the creation of an emerging SWNTs-based nanobioelectronics system is challenged. Specifically, the bottom-up electric-field-assisted reactive ion etching is proposed to control the chirality of SWNTs, unexplored SWNT properties of magnetism and superconductivity are aimed at being pioneered, and innovative biomedical-nanoengineering with encapsulated SWNTs of higher-order structure are expected to be developed by applying advanced gas–liquid interfacial plasmas.