Characterization of co-deposition behavior of ultrafine particles with plated films for fabrication of highly functional composite materials

1. 超声波是分散纳米/微米级金刚石颗粒的有效手段。采用混合酸热处理精制工艺，获得了纳米金刚石共沉积量恒定、可重复的结果。用蒸发碳薄膜支撑样品，适合于镀膜的显微观察。络合剂对化学镀镍过程中纳米粒子的共沉积行为有显著影响。其中，柠檬酸盐对大量共沉积效果较好。采用混合酸精制工艺制备了高亲水性纳米金刚石表面。这导致了大量的共沉积。金属离子与镀层之间的相互作用是导致大量共沉积的重要因素。这是通过粒子和镀膜之间的相互作用以及金属离子和粒子之间的相互作用来实现的。在纳米粒子复合镀中，粒子表面和镀层边界（表面）的作用变得非常重要。为了制备大颗粒共沉积的纳米复合镀层材料，应适当保持颗粒表面、镀层边界和金属配合物之间的相互作用。它是纳米复合镀层成功的关键。

1. Application of ultrasonic wave is effective in order to disperse the nano/micron-sized diamond particles2. Constant and reproducible results of codeposition amount of nanodiamond was achieved by the refinement process which was processed by the heat treatment in mixed acid.3. To support the sample by an evaporated carbon thin film was suitable for microscopic observation of the plated films.4. Complexing agents had significant effects on the co-deposition behavior of the nano-particles in electroless nickel plating. Especially, citrate was very effective on large amount co-deposition.5. A highly hydrophilic surface of nanodiamond was made by the refinement process in mixed acid. It resulted in the large amount co-deposition.6. The interaction between metal ion and a plated film was most important for the large amount co-deposition. It was realized by the presence of both the interactions, the interaction between a particle and a plated film, and the interaction between metal ion and a particle.7. The role of the particle surface and the role of the plating frontier (surface) becomes much important in the composite plating of nanoparticles. The interactions among the particle surface, the plating frontier and the metal complex should be appropriately maintained in order to fabricate the nano-composite plated materials of large-amount-particle co-deposition. It is the essential of the successful nano-composite plating.