Electromagnetic and microwave absorbing properties of magnetite nanoparticles decorated carbon nanotubes/polyaniline multiphase heterostructures

Abstract

Magnetite nanoparticles decorated CNTs/PANI multiphase heterostructures were prepared by polymerization of aniline monomer and an additional process of the

Controllable synthesis of leaflet-like poly (3,4-ethylenedioxythiophene)/single-walled carbon nanotube composites with microwave absorbing property

“…Recently, Zhang et al reported the electromagnetic and microwave absorbing properties of magnetite nanoparticles decorated carbon nanotubes/polyaniline multiphase heterostructures (CNTs/PANI/Fe 3 O 4 ). The results showed that under the optimum condition the largest reflection loss value of CNTs/PANI/Fe 3 O 4 multiphase heterostructures was À22.4 dB at 11.7 GHz with about 6.9 GHz bandwidth below À10 dB [51]. From the results what we discussed above, it can be seen that the leafletlike PEDOT/SWCNT composites possess good microwave absorbing property.…”

“…8a and b). These small peaks may be attributed to the interaction between PEDOT and SWCNTs [51]. Fig.…”

“…The phenomena may result from the interaction of microwave radiation with charge multi-poles at the three interfaces of PEDOT/SWCNTs and paraffin matrix, PEDOT shell and SWCNT core as well as PEDOT substructures and PEDOT shell. Due to the specific leaflet-like morphology, there could form more boundaries between these surfaces [50,51]. Thus, interfacial multi-poles formed on these interfaces, would possibly contribute to the microwave absorption.…”

“…It is worth noting that the r is thus taken as a critical factor in the imaginary permittivity e 00 . In the case of the composites based on CNTs, the literatures [51,[53][54][55][56] have already reported that the conductivity of these composites mainly originated from the electrically conductive network formed by CNT aggregations. In the case of the leaflet-like PEDOT/SWCNT here, as its mass fractions increase the PEDOT/ SWCNTs dispersed in the wax matrix could form network structures, which may lead to the formation of the electrical channels for improved conductivity.…”

Effective improvement in microwave absorption by uniform dispersion of nanodiamond in polyaniline through in-situ polymerization

“…The electrical loss of HCl-PANi mainly came from the eddy current loss at the frequency of 2-7 GHz. 24 Interestingly, a broad dielectric response peak could be found at 10-16 GHz for the PANi/ ND-1 (see the supplementary material, Fig. S2(a) (Ref.…”