The length of HNTs is about 1 micrometer but not more than 2 micrometers. The length of ChNTs cannot be estimated due to the state of bending and winding under the electron microscope.
The length of HNTs is distributed in about 1 micron but not more than 2 microns, and chNTs cannot be estimated due to the curved winding state under the electric mirror.
The length of HNTs is about 1 μ m, but not more than 2 μ M. the length of chnts can not be estimated because of its bending and winding under electron microscope.<br>