Nanoparticle

M A TE RI A L S CH A RACT ER IZ A TI O N 62 ( 20 1 1 ) 6 3 5 6 4 1 available at www.sciencedirect.com www.elsevier.com/ stick on/matchar Chemical changes in one C Nanotube-Nickel/Nickel Oxide philia/ nail nanoparticle heterostructures do by at high temperatures Nitin Chopraa,?, Hylton G. McWhinney b , Wenwu Shi a a Metallurgical and Materials Engineering, decoct for Materials for data Technology (MINT), Box 870202, The University of Alabama, Tuscaloosa, AL 35487 USA b Prairie ruling A&M University, TX 77446 USA AR TIC LE D ATA article history: Received 25 January 2011 Received in rewrite form 10 April 2011 accepted 15 April 2011 Keywords: Core/ overreach nanoparticles Carbon carbon nanotubes Heterostructures XPS negatron microscopy ABSTR ACT Heterostructures composed of carbon nanotube (CNT) coated with Ni/NiO magnetic summation/shell nanoparticles (denoted as CNC heterostructures) were synthesized in a wet-chemistry and single-step synthesis path involving direct nucleation of nanoparticles on CNT surface. dickens different aspects of CNC heterostructures were studied here. First, it was detect that the nanoparticle coatings were more uniform on the as-produced and non-purified CNTs compared to purified (or acid treated) CNTs.

These heterostructures were characterized using electron microscopy, Raman spectrographic analysis, and energy dispersive spectroscopy. Second, caloric stability of CNC heterostructures was studied by annealing them in N2-rich (O2-lean) purlieu among 125 and 750 °C for 1 h. A flesh come out of the closet X-ray photoelectron spectroscopy and Raman spectroscopy analysis was performed to evaluate the raise of annealing temperatures on chemic composition, phases, and stability of the heterostructures. It was observed that the CNTs come out in the heterostructures completely decomposed and core Ni nanoparticle oxidized significantly between 600 and 750 °C. © 2011 Elsevier Inc. All rights reserved. 1. Introduction owe to their high surface-to-volume ratio and...If you tender to get a plentiful essay, order it on our website: Ordercustompaper.com

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