NanoST 版 (精华区)
发信人: heat (heat@给你的热量), 信区: NanoST
标 题: The future of carbon nanotubes
发信站: 哈工大紫丁香 (2004年04月08日05:39:51 星期四), 站内信件
The future of carbon nanotubes
Currently, we are gaining a greater understanding of the electrical characte
ristics of carbon nanotubes through both theoretical and experimental means.
Research is moving forward in the field of fabrication methods, but many hav
e said that it is difficult to produce long carbon nanotubes formed basicall
y from hexagonal graphenes, because in the process of generating these nanot
ubes, pentagonal and heptagonal graphenes are also created, resulting in tub
es with closed ends or with ends that spread out. Progress has been made in
technologies for creating long tubes, however; for example, in April 2003, A
merican researchers announced that they had created a carbon nanotube with a
length of six millimeters. Our group has set a target for the large-scale p
roduction of carbon nanohorns, and has already entered the implementation ph
ase.
There are still numerous issues to overcome, however. For example, we are as
yet unable to control the thickness of the tubes, or their spiral shape as
we expected. Also, some have asked whether it will be possible to use carbon
nanotubes in hydrogen storage materials; although methane is absorbed effec
tively, we have recently found that hydrogen storage is problematic.
In addition to applications in carbon nanotube transistors and fuel cells fo
r mobile devices discussed earlier, we are conducting research to determine
whether carbon nanotubes can be used in the field of nano-biotechnology. Car
bon itself has a high affinity with the human body, so we believe that carbo
n nanotubes are ideally suited to applications related to DNA and other mole
cular identification materials.
In the future, we will see the establishment of large-scale synthesis of car
bon nanotubes as well as an acceleration in research targeting their applica
tions. Without doubt, carbon nanotubes represent a material that offers grea
t potential, bringing with it the possibility of breakthroughs in a new gene
ration of devices, electric equipment and bio fields.
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可惜不是这个"财",也不是这个"才",
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