Table 3.

Separation of the external particle surface and the pore surface by isotherm evaluation with the t-plot method according to ISO 15901-3 (ISO 15901-3 2007) and to Lecloux (Lecloux 1981, 1986) on the NanoDefine materials (Lecloux A, personal communication; 2015). The total surface, the surface of the micropores and the external surface are compared for both methods and finally, the dmin_VSSA derived from both values for the external surface area are compared to the one obtained by conventional BET and the minimum Feret diameter from EM measurements (and the tube width for MWCNT). In case of a significant difference between BET and t-plot, the numbers are printed in italic and reliable (by comparison with EM) results are colored in green, questionable results in red