Highly Ordered Arrays of Metal/Semiconductor Core-Shell Nanoparticles with Tunable Nanostructures and Photoluminescence

摘要

Most of the approaches so far in fabricating core-shell nanoparticles(CSNs)are based on wet-chemical methods.It is usually difficult to achieve highly ordered CSN arrays on substrates from such a wet-chemical method.In this work,highly ordered indium oxide coated indium CSNs,with a structure-dependence photoluminescence,are fabricated on Si substrates using a three-step oxidation process.By controlling the three-step oxidation process,the volume ratio of the oxide shell to the whole CSN can be adjusted continuously from 0 to 1,which results in fine-tuning of the intensity and peak-shift of the photoluminescence from the CSNs.Our work is based on a dry oxidation method for fabricating CSNs,which is capable of achieving highly ordered CSN arrays with tunable nanostructures and optical properties.