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采用乙酰丙酮铜为原料,通过化学气相沉积大批量制备出Cu/C核/壳纳米颗粒和纳米线.研究结果表明,通过控制沉积温度可对Cu/C核/壳纳米材料的形貌和结构进行很好的控制.比如,沉积温度为400℃时可获得直径约200nm的Cu/C核/壳纳米线,沉积温度为450℃时可获得直径约200nm的Cu/C核/壳纳米颗粒和纳米棒的混合产物,沉积温度为600℃时可获得直径约22nm的Cu/C核/壳纳米颗粒.获得的Cu/C核/壳纳米结构是由一个新颖的凝聚机理形成的,而这种机理不同于著名的溶解-析出机理.紫外-可见光谱和荧光光谱分析结果表明:Cu/C核/壳纳米线和纳米颗粒均在225nm处出现Cu的吸收峰,同时在620和616nm处分别出现了纳米线和纳米颗粒的表面等离子共振吸收峰.Cu/C核/壳纳米线在312和348nm处、Cu/C核/壳纳米颗粒在304和345nm处出现荧光发射谱峰.
Cu / C core / shell nanoparticles and nanowires were prepared in large quantities by chemical vapor deposition using copper acetylacetonate as raw material.The results show that the morphology and structure of Cu / C core / shell nanomaterials can be controlled by controlling the deposition temperature For example, Cu / C core / shell nanowires with a diameter of about 200 nm can be obtained when the deposition temperature is 400 ° C. Cu / C core / shell nanoparticles with a diameter of about 200 nm can be obtained when the deposition temperature is 450 ° C. and Nanorods, Cu / C core / shell nanoparticles with a diameter of about 22 nm can be obtained at a deposition temperature of 600 ° C. The obtained Cu / C core / shell nanostructures are formed by a novel coacervation mechanism, The mechanism is different from the well-known dissolution-precipitation mechanism. The results of UV-Vis and fluorescence spectroscopy show that Cu / C core / shell nanowires and nanoparticles all show the absorption peak of Cu at 225nm, and appear at 620 and 616nm respectively The surface plasmon resonance absorption peaks of nanowires and nanoparticles were observed at 312 and 348 nm for Cu / C core / shell nanowires, and the fluorescence emission peak appeared at 304 and 345 nm for Cu / C core / shell nanoparticles.