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FTIR characterization of the reactive interface of cobalt oxide nanoparticles embedded in polymeric matrices
Journal article   Peer reviewed

FTIR characterization of the reactive interface of cobalt oxide nanoparticles embedded in polymeric matrices

Rina Tannenbaum, Melissa Zubris, Kasi David, Dan Ciprari, Karl Jacob, Iwona Jasiuk and Nily Dan
The journal of physical chemistry. B, v 110(5), pp 2227-2232
09 Feb 2006
DOI: https://doi.org/10.1021/jp054469y
PMID: 16471808

Abstract

Fourier transform infrared spectroscopy (FTIR) was used as a novel characterization method to determine the properties of the interface that developed when cobalt oxide nanoparticles were self-assembled in a poly(methyl methacrylate) (PMMA) matrix. The method employed the distinct changes that were observed in the infrared spectra of the polymer upon adsorption onto the cobalt oxide nanoparticles, allowing a quantitative determination of the average number of contact points that the average polymer chain formed with the surface of a cobalt oxide nanoparticle of average size. The results obtained with this method compared favorably to those obtained by the coupling of transmission electron microscopy (TEM) experiments with thermogravimetric analysis (TGA). On the basis of both methods, we concluded that the interfacial region created between the cobalt oxide nanoparticles and PMMA is extremely sensitive to the chain length, i.e., the number of anchor points and the density of the polymer layer increase with chain molecular weight. At molecular weights of approximately 250,000, the density of the polymer layer saturates at a value that correspond to that of very thin PMMA films.

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Domestic collaboration
International collaboration
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Chemistry, Physical
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