Nanotechnology and nanomaterials

Electro-transport properties of CNT decorated by FeNi nanoparticles
Syvolozhskyi O.A.1, Matzui L.Yu.1, Ovsiienko I.V.1, Len T.A.1, Vovchenko L.L.1
1Taras Shevchenko National University of Kyiv, 01601, Kyiv, Volodymyrska st. 64/13, Department of Physics
E-mail: mail.olexiy@gmail.com

This work presents the study of segregated polymer composites based on ultra-high-molecular-weight polyethylene (UHMWPE) filed with hybrid filler - carbon nanotubes (CNTs) decorated by NiFe nanoparticles.
The main objective is to ascertain the influence of hybrid filler in segregated polyethylene composites on their electrical properties.
Electrical conductivity of the investigated composites was measured by standard two-probe method in DC mode at room temperature 
The electrical conductivity σDC of CNTs/UHMPE and (CNTs- NiFe)/UHMPE composites with segregated filler distribution was studied as function of fillers volume content φ; results are shown in Fig. 1
As one can see from the Fig. 1, the use of CNTs- NiFe as a filler leads to increase in conductivity at higher concentrations. The effect of decoration on the electrical transport properties of composites at low concentrations was not detected
The electrical conductivity of both systems demonstrates percolation behavior with a sharp magnitude increase when the percolation threshold is reached.

Fig. 1. Concentration dependences of conductivity for the segregated UHMPE-based composites filled with, CNTs(1) and CNTs-NiFe.(2)