| abstract |
The present invention uses an adsorbent material that contains a carbon nanohorn aggregate in which a plurality of single-walled carbon nanohorns aggregate in the form of fiber, and that also contains a spherical carbon nanohorn aggregate, and wherein some of the single-walled carbon nanohorns contained in the carbon nanohorn aggregate have openings. This adsorbent material which contains a fibrous carbon nanohorn aggregate is able to be produced by a method that comprises: a step for forming an atmosphere of an inert gas, a nitrogen gas or a mixture thereof within a container in which a catalyst-containing carbon target is arranged; and a step for obtaining a carbon nanohorn aggregate containing a fibrous carbon nanohorn aggregate, in which a plurality of single-walled carbon nanohorns aggregate in the form of fiber, by evaporating the target. |