Fabrication of Hollow Metal Nanocaps and Their Red-Shifted Optical Absorption Spectra

Abstract

Cap-shaped metal nanoparticles have optical spectra with significant absorption in the infrared. Such shapes, produced by physical vapor deposition onto a polymer particle template, can be readily separated from one another provided that deposition is carried out an inclination to the plane of the template. The effect of composition, angle of deposition and thickness on the properties of the cap-shaped particles is discussed.