Self-Assembled Plasmonic Nanoparticle Clusters

By Jonathan A. Fan, Chihhui Wu, Kui Bao, Jiming Bao, Rizia Bardhan, Naomi J. Halas, V. Manoharan, P. Nordlander, G. Shvets, F. Capasso. Science, 2010

1,386 citations recorded by the source corpus.

Optical Nanoengineering Optics and electronics operate at very different length scales. Surface plasmons are light-induced electronic excitations that are being pursued as a route to bridge the length scales and bring the processing speed offered by optical communication down to the size scales of electronic chip circuitry. Now, Fan et al. (p. 1135) describe the self-assembly of nanoscale dielectric particles coated with gold. Functionalization of the gold surface with polymer ligands allowed controlled production of clusters of nanoparticles. The optical properties of the self-assembled nanostructures depended on the number of components within the cluster and each structure could be selected for its unique optical properties. Such a bottom-up approach should help in fabricating designed optical circuits on the nanoscale. A hierarchy of nanoscale optical structures is created from nanoparticles that have metal shells and dielectric cores. The self-assembly of colloids is an alternative to top-down processing that enables the fabrication of nanostructures. We show that self-assembled clusters of metal-dielectric spheres are the basis for nanophotonic structures. By tailoring the number and position of spheres in close-packed clusters, plasmon modes exhibiting strong magnetic and Fano-like resonances emerge. The use of identical spheres simplifies cluster assembly and facilitates the fabrication of highly symmetric structures. Dielectric spacers are used to tailor the interparticle spacing in these clusters to be approximately 2 nanometers. These types of chemically synthesized nanoparticle clusters can be generalized to other two- and three-dimensional structures and can serve as building blocks for new metamaterials.

Subfields: Atomic and Molecular Physics, and Optics, Biomedical Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/da92e615b6b9731d74b2ba64978f4f293d23fe97

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Citations in the corpus

Light scattering and surface plasmons on small spherical particles (2014, background): “The particle size for this A short review of light scattering on small particles XF Fan et al 10 Light: Science & Applications doi:10.1038/lsa.2014.60 can be estimated from the skin depth given by44 Ds~ l 2p Re {e2p epzem !”