Blueshift of the surface plasmon resonance in silver nanoparticles studied with EELS

By S. Raza, N. Stenger, S. Kadkhodazadeh, S. Fischer, N. Kostesha, A. Jauho, Andrew Burrows, M. Wubs, N. A. Mortensen. 2012

199 citations recorded by the source corpus.

Abstract We study the surface plasmon (SP) resonance energy of isolated spherical Ag nanoparticles dispersed on a silicon nitride substrate in the diameter range 3.5–26 nm with monochromated electron energy-loss spectroscopy. A significant blueshift of the SP resonance energy of 0.5 eV is measured when the particle size decreases from 26 down to 3.5 nm. We interpret the observed blueshift using three models for a metallic sphere embedded in homogeneous background material: a classical Drude model with a homogeneous electron density profile in the metal, a semiclassical model corrected for an inhomogeneous electron density associated with quantum confinement, and a semiclassical nonlocal hydrodynamic description of the electron density. We find that the latter two models provide a qualitative explanation for the observed blueshift, but the theoretical predictions show smaller blueshifts than observed experimentally.

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

View Paper: https://www.semanticscholar.org/paper/091b9e7cb7007eae024b8bfb1c5adb75740f0e04

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Atomic and Molecular Physics, and Optics

In Biomedical Engineering

In Electronic, Optical and Magnetic Materials

Citations in the corpus

Quantum Plasmonics (2016, background): “Examples of where the local response fails are resonance shifts in small MNPs [14], [25], [33], [56], [108], [118], [120], [121], [132]–[134], [142], [149], linewidth broadening [7], [78], [84], [160], longitudinal excitations above the plasma frequency (in both thin films [3], [87] and NPs [4], [12”