Theoretical Study Of AIREs On Nanostructured Pt Surface

Nanomaterials has many unusual properties. An anomalous IR effects for CO adsorbed on nanoparticles was observed by experiments.We proposed a mechanism of interaction and electron-hole damping to interpret the anomalous IR effects and the spectral features. Simulation shows that the nanostructured surfaces, which give rise to particles interaction, coupling with electron-hole mechanism, may contribute to the origins of the change of spectral features observed on the nanomaterials.The local field distribution and the configuration of CO molecules adsorbed on a nanostructured metal surface using numerical Monte Carlo computation are obtained. It is found that the local field produced either by surface growth or nanoparticle agglomeration influences the configuration of carbon monoxide (CO) molecules through a force dragging the adsorbtions to the poles of the nanoparticles. The agglomeration of the adsorbtions, together with the results obtained before, may explain the experimental results that both nanoparticle agglomeration and surface growth of nanostructure lead to some abnormal phenomena such as abnormal IR effects.The investigation we have made may serve as a starting point to explain the abnormal IR effects.