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通过更换基底材料 ,证实了稀土镧对Ag BaO薄膜中银纳米粒子的细化作用 .用Lewis Campbell的薄膜理论分析表明 ,稀土镧对银纳米粒子的细化作用机理是 ,基底吸附稀土镧增强了基底对银原子的等效吸附能和基底表面徙动激活能 ,使镧和银结合形成的复合小银粒子在基底表面的徙动扩散运动受到削弱 ,进而减少了相互团聚所致 .基底表面徙动激活能增量在 0 .0 4— 0 .0 7eV之间 ,相应的基底对银原子的等效吸附能增量在 0 .0 8— 0 .42eV之间
The thinning effect of rare earth lanthanum on the silver nanoparticles in Ag BaO films was confirmed by the replacement of the substrate materials.The theoretical analysis of films by Lewis Campbell showed that the mechanism of thinning of silver nanoparticles by the lanthanum lanthanum is that the substrate lanthanum enhanced the substrate The equivalent adsorption energy of silver atoms and the migration activation energy of the substrate surface make the movement and diffusion of composite small silver particles formed by the combination of lanthanum and silver weakened on the surface of the substrate, thereby reducing the mutual reunion. The increment of activation energy is between 0. 0 4 0 0 0 0 0 eV and the corresponding substrate can increase the equivalent adsorption energy of silver atoms between 0. 0 8- 0 .42 eV