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Issue 41, 2012
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Molecular-mediated assembly of silver nanoparticles with controlled interparticle spacing and chain length

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Abstract

In the present work, we report on a one-pot method for the assembly of noble metal nanoparticles with tunable optical properties, assembly length and interparticle spacing. The synthetic colloidal route is based on the covalent binding among OH-terminated silver nanoparticles by means of dicarboxylic acids with a defined molecular length. As a result, the initially symmetric plasmon band of silver nanoparticles splits into two plasmonic modes when nanoparticles are assembled due to the strong near-field plasmon coupling. We noticed a very good correlation between the plasmon wavelength shift and the interparticle spacing that is represented by the universal scaling law of the surface plasmon resonance in metal nanoparticle dimers. A relationship between the plasmon coupling and the assembly size (represented by the number of nanoparticles) for two different interparticle distances has been experimentally found. Such a correlation has revealed the additional effect of the electronic polarizability of the linker on the propagation of the plasmon coupling between NPs.

Graphical abstract: Molecular-mediated assembly of silver nanoparticles with controlled interparticle spacing and chain length

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Publication details

The article was received on 17 Jul 2012, accepted on 06 Sep 2012 and first published on 06 Sep 2012


Article type: Paper
DOI: 10.1039/C2JM34707E
Citation: J. Mater. Chem., 2012,22, 22204-22211
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    Molecular-mediated assembly of silver nanoparticles with controlled interparticle spacing and chain length

    R. Abargues, S. Albert, J. L. Valdés, K. Abderrafi and J. P. Martínez-Pastor, J. Mater. Chem., 2012, 22, 22204
    DOI: 10.1039/C2JM34707E

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