中文摘要：

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.

英文摘要：

Copper/carbon core/shell structure nanoparticles and nanowires are successfully synthesized by using a one-step low-temperature metal-organic chemical vapor with copper（II）acetylacetonate powders as precursor.Morphology and structure of copper/carbon core/shell nanomaterial can be well controlled by deposition temperature For instance,copper/carbon core/shell nanowires about 200 nm in diameter can be produced at 400℃.The mixture of nanowires and nanoparticles can be produced at 450℃.At 600℃ the production is the copper/carbon core/shell nanoparticles about 22 nm in diameter.The obtained copper/carbon core/shell nanostucture is found to be formed by a novel coalescence mechanism that is quite different from the well-known dissolution-precipitation mechanism The optical property of copper/carbon core/shell nanostructure is investigated Uv-vis spectrometer and the fluorescence spectrometer（PL）.The results show that the surface plasma resonance peaks of copper/carbon core/shell nanowire and nanoparticle are located at 620 nm and 616 nm respectively.At 225 nm,copper absorbing peak can be found.The PL peaks of copper/carbon core/shell nanowires are located at 312 nm and 348 nm,and the PL peaks of copper/carbon core/shell nanoparticles are observed at 304 nm and 345 nm.