Add time:09/28/2019         Source:infona.pl

We report a one-step functionalization reaction of forests of vertically aligned multi-walled carbon nanotubes (MWCNTs) with Cu or Ni nanoparticles. The benzyl alcohol assisted deposition reaction reduces copper or nickel Acetyl acetonate (cas 17272-66-1) to metallic homogeneously distributed nanoparticles and a 1μm thick metallic capping layer normal to the MWCNT forests. Scanning electron microscopy and transmission electron microscopy images reveal a trimodal diameter regime for the Cu nanoparticles and a bimodal distribution for the Ni nanoparticles. Electron energy loss spectroscopy (EELS) and X-ray diffraction measurements confirm the metallic form of the particles and layers; however EELS reveals surface oxidation of the Cu particles. The metallic layer on top of the functionalized MWCNT forests can serve as a back contact and is deposited simultaneously with the nanoparticles. Field emission measurements reveal a lower contact resistance than for samples prepared by metal sputtering. Comparison with a sputtering process shows the uniqueness of this new Cu functionalization method for CNTs.

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