Issue 48, 2018

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

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

Supplementary files

Article information

Article type
Paper
Submitted
01 Sept. 2018
Accepted
01 Okt. 2018
First published
01 Okt. 2018

Nanoscale, 2018,10, 22750-22757

Author version available

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, 10, 22750 DOI: 10.1039/C8NR07115B

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