Nanoparticles optics: the importance of radiative dipole coupling in two- dimensional nanoparticle arrays

Article Abstract:

The electromagnetic interactions between noble metal nanoparticles are studied by measuring the extinction spectra of two-dimensional arrays of Au and Ag cylinders and trigonal prisms that have been fabricated with electron beam lithography. The results demonstrate that Au and Ag have similar dielectric properties for localized surface plasmon resonance (LSPR) in the far- red and near- infrared although they have significant differences in behavior below 700nm.

Spectra, Optical properties, Particle physics

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The extinction spectra of silver nanoparticle arrays: influence of array structure on plasmon resonance wavelength and width

Article Abstract:

The extinction spectra of one-dimensional linear chains and two-dimensional planar arrays of spherical silver nanoparticles are studied by using high- quality electrodynamics methods. Results for one-dimensional chains show that as the spacing decreases, the plasmon width broadens under both parallel and perpendicular polarization but the wavelength mostly red shifts under parallel polarization and blue shifts under perpendicular polarization.

Resonance, Resonance (Physics)

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Atomic-scale roughness effect on capillary force in atomic force microscopy

Article Abstract:

The capillary force in atomic force microscopy is studied using Monte Carlo simulations. The meniscus at the nanoscale gives rise to a capillary force that responds sensitively to the tip roughness and with only a slight change in tip shape, the pull-off force significantly changes its qualitative variation with humidity.

Analysis, Atomic force microscopy, Capillarity

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