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/ positioning/matchar Chemical changes in light speed Nanotube-Nickel/Nickel Oxide philia/ nail nanoparticle heterostructures hardened at high temperatures Nitin Chopraa,?, Hylton G. McWhinney b , Wenwu Shi a a Metallurgical and Materials Engineering, decoct for Materials for training Technology (MINT), Box 870202, The University of Alabama, Tuscaloosa, AL 35487 USA b Prairie realise A&M University, TX 77446 USA AR TIC LE D ATA word history: Received 25 January 2011 Received in rewrite form 10 April 2011 accredited 15 April 2011 Keywords: Core/ pillory nanoparticles Carbon carbon nanotubes Heterostructures XPS negatron microscopy ABSTR ACT Heterostructures composed of carbon nanotube (CNT) coated with Ni/NiO total/shell nanoparticles (denoted as CNC heterostructures) were synthesized in a wet-chemistry and single-step synthesis course involving direct nucleation of nanoparticles on CNT surface. 2 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 spectrometry, and energy dispersive spectroscopy. Second, thermal stability of CNC heterostructures was studied by annealing them in N2-rich (O2-lean) purlieu amidst 125 and 750 °C for 1 h. A flesh out(a) X-ray photoelectron spectroscopy and Raman spectroscopy analysis was performed to evaluate the ensnare of annealing temperatures on chemical composition, phases, and stability of the heterostructures. It was observed that the CNTs draw in the heterostructures completely decomposed and incumbrance 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 regard to get a wide-eyed essay, order it on our website: Orderessay

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