【摘要】 应用透射电子显微镜中电子能量损失谱仪(TEM-EELS),对电子束激发的单晶Au纳米线耦合结构及单晶/多晶纳米薄膜的表面等离激元(SPs)特征进行分析.结果表明:直径约为10nm的两单晶Au纳米线平行耦合时,单根纳米线和耦合结构中均存在位于2.4eV的SPs共振,耦合结构中SPs的纵模数增加;单晶及多晶Au纳米薄膜在1.4eV附近存在SPs模式,相较于单晶薄膜,多晶Au纳米薄膜的SPs共振峰位出现明显红移.更多还原

【Abstract】 We demonstrate the characteristics of surface plasmons(SPs)of the Au monocrystal nanowires couple structure and monocrystal/polycrystal Au nanofilms in a transmission electron microscope(TEM)with electron energy-loss spectroscopy(EELS).We found that the plasmonic resonant modes,which are 2.4eV in EELS,can be found both in a single 10-nm-diameter nanowire and tow coupled nanowires.In the parallel-coupling nanowires,more longitudinal modes are observed than that in single nanowire.In monocrystal and polycrystal Au nanofilms,the plasmonic modes at 1.4eV are observed,while SPs resonance peak is red-shifted in polycrystalline Au nanofilm.更多还原