Near-field infrared nanoscopy of phonon resonant silica and silica-coated goldnoparticles
Single silica capped and uncapped gold nanoparticles are imaged using apertureless near-field optical microscopy (ANSOM) in the visible (λ=632 nm) and infrared frequencies (λ=10.7 µm). Identification of capped and uncapped particles with nanoscale spatial resolution [...]