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Micro structure analyses of nanotubes and their application to material science

纳米管的微观结构分析及其在材料科学中的应用

基本信息

批准号：
11165240
负责人：
ANDO Yoshinori
金额：
$ 13.82万
依托单位：
Meijo University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research on Priority Areas (A)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11165240/
关键词：
MWNTs SWNTs micro structure analyses Arc discharge Raman spectra breathing modes arc plasma jet method Quantitative production of nanotubes 水素ガス中アーク放電空気中加熱精製ナノ粒子 X線回折電気伝導度

项目摘要

In this research, it was aimed to clarify the micro structure of nanotubes and their application to material science. For its purpose, a large amounts of nanotubes are necessary and required. In this two years, we have succeeded to get high quality multiwalled carbon nanotubes (MWNTs) and single-walled carbon nanotubes (SWNTs) in some quantity. Their application to material science has been just started.By DC arc discharge evaporation of pure graphite rod in pure hydrogen gas, high quality MWNTs of high aspect ratio larger than 1000 and highly crystarized ones could be obtained. Other characteristic feature of the MWNTs is that the inner tube is very thin. The smallest inner tube is 0.4 nm, which value is the smallest one theoretically expected. In Raman spectra, the peak of breathing modes corresponding to the thin inner tubes could be observed. Quantitative productions of such high quality MWNTs are planned now.In order to get a large quantity of SWNTs by arc discharge, we developed a new arc plasma method by inclining the electrode. As the result, soots including 50% SWNTs were obtained in the order of a few gram in a few minutes. It can be tested to practical application, but purification of SWNTs is still left problem.

本研究的目的是阐明纳米管的微观结构及其在材料科学中的应用。为了达到这个目的，需要大量的纳米管。在这两年中，我们已经成功地获得了高质量的多壁碳纳米管（MWNTs）和单壁碳纳米管（SWNTs）。碳纳米管在材料科学中的应用才刚刚起步，用纯石墨棒在纯氢气中进行直流电弧放电蒸发，可以得到高质量的长径比大于1000的多壁碳纳米管和高度晶化的多壁碳纳米管。MWNT的其他特征是内管非常薄。最小的内管为0.4 nm，该值是理论上预期的最小值。在拉曼光谱中，可以观察到对应于薄内管的呼吸模式的峰。为了利用电弧等离子体技术制备大量的单壁碳纳米管，我们开发了一种新的电弧等离子体方法--倾斜电极电弧等离子体法。结果，在几分钟内获得了几克数量级的包含50%SWNT的烟灰。该方法可以用于实际应用，但单壁碳纳米管的纯化仍然是一个难题。