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Plasmon-induced polymerization can facilitate the site-selectivity and orientation of polymer growth, which enriches the toolbox of polymerization and nanofabrication. Here, we demonstrate plasmon-induced polymerization, accomplished by low-power laser excitation of gold nanoparticles (NPs). We selectively control the growth of polymers around single plasmonic NPs while monitoring the polymerization...
Plasmonic nano-cavities have the ability to confine light in sub-wavelength gaps. The smallest possible plasmonic nano-cavities are achieved with the nanoparticle on mirror (NPoM) configuration [1], where a flat metal substrate is separated from a nanoparticle with a thin molecular spacer, typically of 1–1.5nm thick (Fig.1a). The massive field enhancement facilitates the strong-coupling of a single...
Longitudinal antenna and transverse cavity modes can be excited when bringing a faceted plasmonic nanoparticle close to a metallic substrate. Their interaction leads to a rich optical response, understandable in terms of the modal symmetry.
The optical response of plasmonic cavities formed by metallic nanoparticles deposited on a metallic substrate separated by self-assembled monolayers of conductive organic molecules can be precisely controlled by the exact chemical composition of the monolayers.
Within the framework of a method-of-moments algorithm, the natural frequencies and natural modes of a scatterer/antenna can be found by looking for the complex frequencies where the determinant of the impedance matrix becomes zero. However, for nanotopologies, the value of this determinant can easily go beyond the resolution or representation limits available on present-day computers. In this work,...
Tuneable plasmonic devices assembled from a combination of plasmonic metals and soft polymers possess optical resonances across the visible and infrared. We demonstrate through SERS such nanostructures sequester molecules, enabling a wide variety of applications.
Novel 3D plasmonic rolls are fabricated through strain-induced self-rolling of metallic nanopore sheets attached to elastomeric thin films, with optical properties tunable by varying the size and thickness of nanopores, and dynamically by light irradiation.
SERS of sub-monolayers of benzenethiol and quantum dots are studied over a wide temperature range on plasmonic nanostructures. Unusual changes are observed in the background shape and intensity as well as the vibrational signals.
Carbon dioxide snow jets are used to eject and rearrange molecules attached to nanostructured plasmonic surfaces. Tracking the dynamics of such perturbations provides strong insight into the origin of different contributions to SERS.
Metallic nanoparticles inside metal cavities show extremely strong plasmonic field enhancement both theoretically and experimentally. Plasmonic coupling gives a universal power-law dependence on particle-surface gap, both for field enhancement and resonant wavelength shift.
Aggregation of gold nanoparticles with rigid cucurbit[5]uril molecules generates fixed inter-particle separations of 0.91 nm. These nanoparticle assemblies possess discrete plasmonic modes which elucidate nanoscale growth and serve as molecular-recognition based SERS substrates.
Nanostructured gold surfaces with localised surface plasmon resonances are shown to produce surface-enhanced Raman scattering (SERS) of sub-monolayers of semiconducting quantum dots. These results pave the way for quantum dots use as markers.
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