Nobody knows... since it depends on many factors like number of walls (if MWCNT), type of defects, extent of Fe filling etc.. read this paper: DOI: 10.1021/nl034028v
have you filled Fe after growth of CNTs or Fe was used as catalyst?
It is hard to say exact role of catalyst in electrical conductivity of CNTs. Catalyst play main role in growth of CNTs like as position, size, shape and diameter of CNTs, due to that we get different types of CNTs and different geometry of CNTs have different electrical conductivity.
Thank you all for your answers. @Shaman: Yes, I used Fe as catalyst.
In think in this case CNTs are grown on the Fe catalyst it will definitely affect the CNTs conductivity. Also the No of sheets affects the nature of CNTs. Ist you should look for the chirality of the CTNs, but it hard to find out. So its better to check the conductivity by using the method mention in literature.
Hello Lourdes. It is hard to say. It also depends on the level at which you are determining the electrical conductivity (as a porous powdered material, as individual filaments...) because resistivity can increase up to several orders of magnitude from the nanoscale to the macroscale. As a suggestion, you could measure the conductivity of your as-grown CNT by pressing the powder sample (see publications below), and you could remove Fe by a moderate treatment in acid and again measure the conductivity, so you could individuate the effect of Fe. You can find further info in the publications I attach.
Article On the importance of the structure in the electrical conduct...
Article The effect of the functionalization of carbon nanofibers on ...
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