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Preparation, morphology and sonication time dependence of silver nanoparticles in amphiphilic block copolymers of PEO with polystyrene or PMMA

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Abstract

Composite materials comprising arrays of silver nanoparticles in amphiphilic copolymers have been prepared by sonochemically enhanced borohydride reduction of precursor silver nitrate (AgNO3). The precursor was incorporated into the cores of polymeric micelles formed from block copolymers of polystyrene (PS) or poly(methyl methacrylate) (PMMA) with poly(ethylene oxide) (PEO). The copolymers were synthesised with varying hydrophobic block lengths from a PEO macroinitiator by atom transfer radical polymerization (ATRP). UV/visible spectroscopy was used to confirm the formation of elemental silver and the effect of sonication time on the appearance of the silver nanoparticles was determined. The growth was faster than when gold nanoparticles are formed in comparable block copolymers. Nanoparticles formed in copolymers with PMMA blocks were more stable to agglomeration than when polystyrene was used. Electron microscopy revealed the morphology of the nanocomposites which confirmed that both block copolymers are vehicles for the formation of well-defined films containing nanoparticulate silver. However, AgNP formation shows some significant differences from previous reports of gold NP containing materials formed under similar conditions.

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Acknowledgements

One of the authors (I. Din) is highly thankful to the Higher Education Commission, Pakistan for their financial support. The authors are also grateful to the Center for Electron Optical Studies (Dr U. Potter) and the Department of Chemistry, University of Bath, for assistance with the electron microscopy and for providing laboratory facilities respectively.

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Authors and Affiliations

  1. Institute of Chemical Sciences, Gomal University, Dera Ismail Khan, Pakistan

    Imad-Ud-Din, Musa Kaleem Baloch & Saeed Ahmad

  2. Department of Chemistry, Hazara University, Mansehra, 21300, Pakistan

    Mohsan Nawaz, Masroor Ahmad Bangesh, Wajid Rehman & Hameed Ullah

  3. Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK

    Gareth J. Price

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  1. Imad-Ud-Din
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  2. Mohsan Nawaz
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  4. Musa Kaleem Baloch
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  5. Masroor Ahmad Bangesh
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Correspondence to Mohsan Nawaz.

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Imad-Ud-Din, Nawaz, M., Price, G.J. et al. Preparation, morphology and sonication time dependence of silver nanoparticles in amphiphilic block copolymers of PEO with polystyrene or PMMA. J Polym Res 24, 137 (2017). https://doi.org/10.1007/s10965-017-1295-3

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  • DOI: https://doi.org/10.1007/s10965-017-1295-3

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