· Synthesis, self-assembly (including crystallization) and inter-cluster chemistry of molecularly pure noble metal nanoclusters. · Reaction kinetics, dynamics and mechanisms of formation, self-assembly and inter-cluster reactions of noble metal nanoclusters at molecular and atomic levels. · Developing tandem mass spectrometry (MS/MS) as an alternative to X-ray crystallography technique for unraveling the structure and reaction dynamics of noble metal nanoclusters.