Method for shortening fiber like carbon nanohorn assembly and shortening fiber like carbon nanohorn assembly

摘要

The present invention provides a shortened fibrous carbon nanohorn aggregate having a length of 1 μm or more and a diameter in the lateral direction in the range of 30 to 100 nm. (CNB) is shortened by oxidation treatment-stirring in an acid solution-sonication in a liquid and cutting. The shortened CNB has at least one end in the longitudinal direction having an end face in which the tips of the plurality of single-layer carbon nanohorns are not arranged in the longitudinal direction, and the length is shortened to less than 1 μm. Therefore, it has excellent dispersibility.