Enhanced Microwave Absorption in Nickel-Filled Multiwall Carbon Nanotubes in the S Band

Nickel (Ni)-filled multiwall carbon nanotubes (MWCNTs) were synthesized by template-assisted electrochemical deposition of Ni in MWCNTs. Complex dielectric permittivity and magnetic permeability measurements of Ni nanowires (Ni NWs), MWCNTs, and Ni-filled MWCNTs were carried out in the S band. Ni-filled MWCNTs exhibited enhanced real (e 1 ) and imaginary (e 2 ) permittivity when compared to both Ni NWs and MWCNTs. This increase in e 1 and e 2 is attributed to the enhanced interfacial polarization, reduced eddy currents, and the presence of defects in MWCNTs. Ni-filled MWCNTs serve as an efficient microwave absorber in the S-band frequency regime.

[1]  P. Ajayan,et al.  Synthesis of High Coercivity Cobalt Nanotubes with Acetate Precursors and Elucidation of the Mechanism of Growth , 2008 .

[2]  Zeng-min Shen,et al.  Electromagnetic and microwave absorbing properties of multi-walled carbon nanotubes filled with Ag nanowires , 2008 .

[3]  Ji Liang,et al.  The effect of multi-wall carbon nanotubes on electromagnetic interference shielding of ceramic composites , 2008, Nanotechnology.

[4]  X. Ni,et al.  Novel composite of Co/carbon nanotubes: Synthesis, magnetism and microwave absorption properties , 2008 .

[5]  F. Wen,et al.  Analyses on double resonance behavior in microwave magnetic permeability of multiwalled carbon nanotube composites containing Ni catalyst , 2008 .

[6]  S. Lucyszyn.  Microwave Characterization of Nickel , 2008 .

[7]  R. Che,et al.  Electron energy-loss spectroscopy characterization and microwave absorption of iron-filled carbon-nitrogen nanotubes , 2007 .

[8]  Huolin Huang,et al.  Microstructure and microwave absorption properties of carbon-coated iron nanocapsules , 2007 .

[9]  Haiyan Lin,et al.  Investigation of the microwave-absorbing properties of Fe-filled carbon nanotubes , 2007 .

[10]  Xiaodong Chen,et al.  Microwave absorption properties of barium titanate/epoxide resin composites , 2007 .

[11]  Yang Liu,et al.  Microwave absorption properties of the carbon-coated nickel nanocapsules , 2006 .

[12]  David J. Singh,et al.  Room-temperature ferromagnetism in doped face-centered cubic fe nanoparticles. , 2006, Small.

[13]  Chunyi Zhi,et al.  Fabrication and microwave absorption of carbon nanotubes/CoFe2O4 spinel nanocomposite , 2006 .

[14]  V. Bregar,et al.  Advantages of ferromagnetic nanoparticle composites in microwave absorbers , 2004, IEEE Transactions on Magnetics.

[15]  Qing Chen,et al.  Microwave Absorption Enhancement and Complex Permittivity and Permeability of Fe Encapsulated within Carbon Nanotubes , 2004 .

[16]  A. Wadhawan,et al.  Nanoparticle-assisted microwave absorption by single-wall carbon nanotubes , 2003 .

[17]  I. Kinloch,et al.  Towards the production of large-scale aligned carbon nanotubes , 2003 .

[18]  P. Watts,et al.  High Permittivity from Defective Multiwalled Carbon Nanotubes in the X‐Band , 2003 .

[19]  M. Shaffer,et al.  Synthesis of high purity single-walled carbon nanotubes in high yield. , 2002, Chemical communications.

[20]  M. Nath,et al.  Metal nanowires and intercalated metal layers in single-walled carbon nanotube bundles , 2000 .

[21]  C. Kiang.  Electron irradiation induced dimensional change in bismuth filled carbon nanotubes , 2000 .

[22]  Mauricio Terrones,et al.  Enhanced magnetic coercivities in Fe nanowires , 1999 .

[23]  Takahiro Hayashi,et al.  Formation of carbon nanotubes and their filling with metallic fibers on ion-emitting field anodes , 1998 .

[24]  D. Ugarte,et al.  Nanocapillarity and Chemistry in Carbon Nanotubes , 1996, Science.

[25]  P. Colomban,et al.  Microwave absorbent: preparation, mechanical properties and r.f.-microwave conductivity of SiC (and/or mullite) fibre reinforced Nasicon matrix composites , 1996 .

[26]  Stephan,et al.  Growth of manganese filled carbon nanofibers in the vapor phase. , 1994, Physical review letters.

[27]  Jaehwan Kim,et al.  Dielectric measurements on substrate materials at microwave frequencies using a cavity perturbation technique , 1988 .

[28]  A. Hippel,et al.  DIELECTRIC SPECTROSCOPY OF FERROMAGNETIC SEMICONDUCTORS , 1957 .

[29]  C. G. Koops.  On the Dispersion of Resistivity and Dielectric Constant of Some Semiconductors at Audiofrequencies , 1951 .

[30]  J. L. Snoek.  Dispersion and absorption in magnetic ferrites at frequencies above one Mc/s , 1948 .