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Synthesis and Characterization of Carbon Nanotube-Nickel/Nickel Oxide Core/shell Nanoparticle Heterostructures Incorporated in Polyvinyl Alcohol Hydrogel

Published online by Cambridge University Press:  01 February 2011

Wenwu Shi ,
Kristy Crews  and
Nitin Chopra
Wenwu Shi
Affiliation:
nchopra@bama.ua.edu, The University of Alabama, Metallurgical and Materials Engineering, Center for Materials for Information Technology (MINT), Tuscaloosa, Alabama, United States
Kristy Crews
Affiliation:
nchopra@mint.ua.edu, The University of West Alabama, Department of Chemistry (NSF-REU Fellow 2009), Livingston, Alabama, United States
Nitin Chopra
Affiliation:
nchopra@eng.ua.edu, The University of Alabama, Metallurgical and Materials Engineering, Center for Materials for Information Technology (MINT), Tuscaloosa, Alabama, United States
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Abstract

Carbon nanotube (CNT)-nickel/nickel oxide (Ni/NiO) core/shell nanoparticles (CNC) heterostructures were prepared in a unique single-step synthetic route by direct chemical precipitation of nanoparticles on CNT surface. Chemical vapor deposition (CVD)-grown CNTs (average diameter ˜42.7±12.3 nm) allowed for direct nucleation and uniform coating of Ni/NiO core/shell nanoparticles (average diameter ˜11.8±1.7 nm). The crystal structure, morphology, and phases in CNC heterostructures were studied using high resolution transmission electron microscopy (TEM), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). Subsequently, the as-produced CNC heterostructures were incorporated into polyvinyl alcohol (PVA) hydrogel resulting in CNC heterostructure-PVA hydrogel with ˜ 75% water absorbing capability. These novel hydrogels were also characterized by SEM and showed actuation under 0.2 T magnet. They are promising for smart analytical devices and platform.

Keywords

nanostructureoxidepolymer
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1272: Symposia KK/LL/NN/OO/PP – Integrated Miniaturized Materials-From Self-Assembly to Device Integration , 2010 , 1272-PP06-20
Copyright
Copyright © Materials Research Society 2010

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