CAJ | 학술논문

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?C时可获得直径约200 nm的Cu/C核/壳纳米线,沉积温度为450?C时可获得直径约200 nm的Cu/C核/壳纳米颗粒和纳米棒的混合产物,沉积温度为600?C时可获得直径约22 nm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225 nm处出现Cu的吸收峰,同时在620和616 nm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348 nm处、Cu/C核/壳纳米颗粒在304和345 nm处出现荧光发射谱峰.
채용을선병동동위원료,통과화학기상침적대비량제비출Cu/C핵/각납미과립화납미선.연구결과표명,통과공제침적온도가대Cu/C핵/각납미재료적형모화결구진행흔호적공제.비여,침적온도위400?C시가획득직경약200 nm적Cu/C핵/각납미선,침적온도위450?C시가획득직경약200 nm적Cu/C핵/각납미과립화납미봉적혼합산물,침적온도위600?C시가획득직경약22 nm적Cu/C핵/각납미과립.획득적Cu/C핵/각납미결구시유일개신영적응취궤리형성적,이저충궤리불동우저명적용해-석출궤리.자외-가견광보화형광광보분석결과표명: Cu/C핵/각납미선화납미과립균재225 nm처출현Cu적흡수봉,동시재620화616 nm처분별출현료납미선화납미과립적표면등리자공진흡수봉. Cu/C핵/각납미선재312화348 nm처、Cu/C핵/각납미과립재304화345 nm처출현형광발사보봉.
@@@@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 ?C. The mixture of nanowires and nanoparticles can be produced at 450 ?C. At 600 ?C the production is the copper/carbon core/shell nanoparticles about 22 nm in diameter. The obtained copper/carbon core/shell nanos-tucture 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.