Optical studies of single metal nanoparticles
This part-themed issue presents an exciting collection of articles on the optical studies of single metal nanoparticles.
Near-field and far-field approaches provide complementary information on the plasmonic response of single nanoparticles. Adapted with permission from ref. 114, 120, 147 and 160.
Optical properties of single coupled plasmonic
This article reviews the electromagnetic (EM) coupling in different forms of metal nanoparticles clusters and prospects the corresponding future directions.
Spectral properties and electromagnetic field enhancement effects on nano-engineered metallic
A perspective review describing the study on spectral properties of nano-engineered metallic particles and its electromagnetic field enhancement effect.
Uniform gold spherical particles for single-particle surface-enhanced Raman spectroscopy
Single particle SERS signals were successfully obtained for a non-resonant aromatic molecule on Au spheres with tunable size and surface roughness.
Surface plasmon coupling in end-to-end linked gold
nanorod dimers and trimers
Red-shift in the longitudinal surface plasmon resonance of end-to-end assembled nanostructures was observed, which exhibited polarization-dependent scattering properties, due to selective excitation of collective bonding and anti-bonding modes.
Local thermal elevation probing of metal
nanostructures during laser illumination utilizing surface-enhanced Raman scattering from a single-walled carbon nanotube
Laser-induced heating of an individual Au nano-dimer was evaluated from the shift of the G-mode Raman spectra of an isolated SWNT under distinct light intensities.
Revealing local, enhanced optical field characteristics of Au
nanoparticle arrays with 10 nm gap using scattering-type scanning near-field optical microscopy
The local, enhanced optical field induced by plasmonic coupling of a gold nanoparticle array is revealed by scattering-type scanning near-field microscopy.
Photothermal signal distribution analysis (PhoSDA)
A novel histogram analysis framework, the photothermal signal distribution analysis (PhoSDA), complements absorption correlation methods of non-fluorescent and non-bleaching ultra-stable metal nanoparticles. It is hereby possible to extract absorbent tracer concentrations, size dispersions, heterogeneous populations and focal geometry parameters which are otherwise inaccessible by correlation analysis.
Simple accurate approximations for the optical properties of metallic nanospheres and nanoshells
New simple analytical expressions provide accurate approximations to describe the plasmonic optical properties of metallic nanospheres and nanoshells.
High-precision measurement-based correlation studies among
atomic force microscopy, Rayleigh scattering, and surface-enhanced Raman scattering at the single-molecule level
We investigated the correlations among the structure, Rayleigh scattering, and single-molecule surface-enhanced Raman scattering (SERS) of DNA-tethered Au–Ag core–shell nanoparticles, especially in dimer and trimer forms.
From patterned optical near-fields to high symmetry acoustic vibrations in gold crystalline platelets
The patterned optical near-field distribution and the mechanical thickness vibrations of individual gold platelets are investigated by Two-Photon Luminescence and femtosecond transient absorption spectroscopy, respectively.
Polarization-resolved ultrafast dynamics of the complex polarizability in single
Using polarization-resolved resonant four-wave mixing in single gold nanoparticles coherent plasmons are distinguished from thermally induced nonlinearities.
Detailed mechanism for the orthogonal polarization switching of gold
Active, orthogonal switching of a gold nanorod’s scattering polarization, achieved by reversible realignment of a liquid crystal medium, is minimally dependent on sample parameters.
Theory for self-consistent interplay between light and nanomaterials strongly modified by metallic
The interplay between the light field and the nanomaterials is designed by localized surface plasmons in metallic nanostructures.
Localized plasmon resonances of bimetallic AgAuAg nanorods
We observe that bimetallic AgAuAg nanorods support plasmons oscillating along the entire length of the nanorod without significant damping at the bimetallic interfaces.
Nanoparticle surface electromagnetic fields studied by single-particle nonlinear optical spectroscopy
Nanoparticle surface electromagnetic fields are studied using single-particle nonlinear optical spectroscopy.
Chemometric analysis of spectroscopic data on shape evolution of
silver nanoparticles induced by hydrogen peroxide
Investigation of shape evolution of silver nanospheres to nanoplates using multivariate curve resolution–alternative least squares is demonstrated.
Strong optical coupling between mutually orthogonal plasmon oscillations in a silver nanosphere–
nanowire joined system
Longitudinal plasmon mode of nanowire couples with dipolar plasmon of nanospheres in a perpendicular direction to the longitudinal mode.
Damping of the acoustic vibrations of a suspended gold
nanowire in air and water environments
The lifetimes of the acoustic vibrations of metal nanostructures depend sensitively on the properties of the environment, such as the acoustic impedance and viscosity.
darkfield microscopy of single hollow gold nanoparticles for biomedical applications
A hyperspectral darkfield imaging microscope is presented capable of detecting single 50-nm diameter hollow gold nanoparticles at illumination intensities compatible with live cell imaging.
Spatial distribution of enhanced optical fields in one-dimensional linear arrays of
gold nanoparticles studied by scanning near-field optical microscopy
We visualized the enhanced optical field distributions in one-dimensional linear array structures of gold nanospheres by using scanning near-field optical microscopy.
Ground state depletion
microscopy for imaging interactions between gold nanowires and fluorophore-labeled ligands
Ground state depletion microscopy of TAMRA-labeled DNA on gold nanowires is used to determine nanowire dimensions and demonstrate fluorescence coupling to surface plasmon polaritons.
photon excited luminescence of single gold particles diffusing in solution under pulsed illumination
Evolution of the diffusion time of gold beads diffusing in water with respect to the pulsed laser irradiance.
About this collection
This themed collection in PCCP, guest edited by Greg Hartland, Hiromi Okamoto, Michel Orrit and Peter Zijlstra, brings together a number of papers on optical studies of single metal nanoparticles.