Effect of surface chemistry on the stability of gold nanostructures.

摘要: Understanding the role of surface chemistry in stability nanostructured noble-metal materials is important for many technological applications but experimentally difficult to access and thus little understood. To develop a fundamental understanding effect on both formation stabilization self-organized gold nanostructures, we performed series controlled-environment annealing experiments nanoporous (np-Au) ion-bombarded Au(111) single-crystal surfaces. The np-Au ambient ozone were carried out study adsorbed oxygen under dynamic conditions, whereas Au surfaces used as model system obtain atomic-scale information. Our results show that stabilizes nanoscale structures at low temperatures oxygen-induced mobilization atoms seems accelerate coarsening equilibrium conditions higher temperatures.