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An integrated experimental and theoretical study on the optical properties of uniform hairy noble metal nanoparticles

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Abstract

We report a viable route to plasmonic nanoparticles with well-controlled sizes, shapes, and compositions. A series of monodisperse Ag and Au nanoparticles capped with polystyrene chains (i.e., “hairy” nanoparticles) are crafted by capitalizing on star-like diblock copolymers as nanoreactors. Such monodisperse nanoparticles render an accurate absorption spectrum, providing a strong basis for theoretical investigation into their optical properties. By combining the experimental study with the three-dimensional finite element calculation of electromagnetic field distributions, the contributions of both intra-band and inter-band transitions to plasmonic absorption are revealed. The calculated absorption spectra perfectly reproduce the experimental observations, including the peak positions, shapes, and trends of peak shifting or broadening as a function of nanoparticle sizes. The influences of nanoparticle dimensions and surface ligands on plasmonic absorption of metallic nanoparticles are also systematically explored.

Graphical abstract: An integrated experimental and theoretical study on the optical properties of uniform hairy noble metal nanoparticles

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Publication details

The article was received on 01 Sep 2018, accepted on 01 Oct 2018 and first published on 01 Oct 2018


Article type: Paper
DOI: 10.1039/C8NR07115B
Citation: Nanoscale, 2018, Advance Article
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    An integrated experimental and theoretical study on the optical properties of uniform hairy noble metal nanoparticles

    D. Yang, Y. Chen, H. Peng, G. Chen and Z. Lin, Nanoscale, 2018, Advance Article , DOI: 10.1039/C8NR07115B

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