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Issue 17, 2015
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Efficient size control of copper nanoparticles generated in irradiated aqueous solutions of star-shaped polyelectrolyte containers

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Abstract

The formation of copper nanoparticles (Cu-NPs) in irradiated aqueous solutions of star-shaped poly(acrylic acid) (PAA) were studied at two pH values. Transmission electron microscopy (TEM) demonstrates that the star-shaped macromolecules loaded with Cu2+ ions can act as individual nanosized containers providing a perfect control over the size and size distribution of Cu-NPs. Electron paramagnetic resonance (EPR) and optical spectroscopy show a transformation of mechanisms controlling the reduction of Cu2+ ions and the further formation of Cu-NPs. At pH 2.9, Cu-NPs are formed from the aquacomplexes of Cu2+ ions through homogeneous nucleation. At pH 4.3, the formation of Cu-NPs occurs inside macromolecular containers loaded with Cu2+ ions, which are bound to carboxylic groups of the polyelectrolyte. In the latter case, Cu-NPs apparently ripen from preformed hydrated Cu2O seeds, which are thought to result from the ultrasmall (Cu2+)m(OH)k(COO)n species, thus implying a heterogeneous nucleation.

Graphical abstract: Efficient size control of copper nanoparticles generated in irradiated aqueous solutions of star-shaped polyelectrolyte containers

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Publication details

The article was received on 16 Jan 2015, accepted on 27 Mar 2015 and first published on 27 Mar 2015


Article type: Paper
DOI: 10.1039/C5CP00269A
Citation: Phys. Chem. Chem. Phys., 2015,17, 11490-11498
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    Efficient size control of copper nanoparticles generated in irradiated aqueous solutions of star-shaped polyelectrolyte containers

    A. A. Zezin, V. I. Feldman, S. S. Abramchuk, G. V. Danelyan, V. V. Dyo, F. A. Plamper, A. H. E. Müller and D. V. Pergushov, Phys. Chem. Chem. Phys., 2015, 17, 11490
    DOI: 10.1039/C5CP00269A

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