WASEDA UNIVERSITY |
Synthesis of long CNTs |
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Synthesizing apparatus for CNTs The diameter of CNTs is several nanometers, but its length varies greatly from several micrometers to several millimeters depending on its synthesize method. It is necessary to compose longer CNTs in large quantities to make use of its mechanical strength and high thermal conductivity to the big materials such as architectural materials. |
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The radical CVD apparatus (left figure) and its diagrammatic illustration (right figure) |
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Long CNTs It is possible to synthesize several millimeter long CNTs by using the radical CVD apparatus under proper synthesis condition. The CNTs at the SEM image below are about 5 millimeter long. That is one of the longest CNTs in the world. It is expected that these long CNTs can make several new materials or devices possible. |
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The SEM image of about 5 mm long CNTs |
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Refecence [1] T. Iwasaki, J. Robertson, H. Kawarada, "Mechanism Analysis of Interrupted Growth of Single-Walled Carbon Nanotube Arrays", Nano. Lett., 8, 886-890 (2008) |
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