Reactions of transition metals with acetonitrile clusters in the gas phase are studied using laser ablation-molecule beam technique.

Its structure and character were reviewed, and the synthetic methods, including CVD, ion beam sputtering, laser ablation, ion plating and ion irradiation et al., were completely introduced.

The invention discloses a multi-channel optical-fiber laser coherence beam combination device and a coherence beam combination method based on overlapped body grating.