| 摘要 |
PROBLEM TO BE SOLVED: To provide an alumina nano-tube and a bunch of alumina nano-tubes having highly controlled size and construction. SOLUTION: The alumina nano-tube formed of an alumina having a columnar shape of size 500 nm or less has a columnar slit 53 parallel to the columnar shape. The bunch of alumina nano-tubes consist of the plurality of alumina nano-tubes 51 arrayed and put together in bunch.
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