Laboratorio de Microscopias Avanzadas, Instituto de Nanociencia de Aragon (INA), Universidad de Zaragoza, Mariano Esquillor, Edificio I+D, 50018, Zaragoza, Spain.
Chem Commun (Camb). 2012 Sep 7;48(69):8667-9. doi: 10.1039/c2cc34177h. Epub 2012 Jul 23.
The optical response of multibranched gold nanoparticles is studied by means of electron energy-loss spectroscopy (EELS) in aberration corrected STEM mode. In every case the plasmon response is constant and variations in the maxima positions were found to be dependent on the branches aspect ratio. The good spatial resolution combined with the high energy resolution (0.18 eV) of the monochromated electron beam allows mapping the different plasmonic modes along the entire nanoparticles ranging from 0.7 eV up to 2.25 eV.
采用像差校正扫描透射电子显微镜中的电子能量损失谱（EELS）研究了多分支金纳米粒子的光学响应。在每种情况下，等离子体响应都是恒定的，而最大值位置的变化被发现取决于支的纵横比。单色电子束的高空间分辨率（0.18 eV）与高能量分辨率（0.18 eV）相结合，允许沿整个纳米粒子映射从 0.7 eV 到 2.25 eV 的不同等离子体模式。
