Particle size dependence of the volume plasmon energy in cadmium sulphide quantum dots by electron energy loss spectroscopy
Particle size dependence of the volume plasmon energy in cadmium sulphide quantum dots by electron energy loss spectroscopy
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DOI：
10.1063/1.369337
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发表时间：
1999-01
影响因子：
3.2
通讯作者：
P. Nakashima;T. Tsuzuki;Andrew W S Johnson
中科院分区：
文献类型：
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作者：
P. Nakashima;T. Tsuzuki;Andrew W S Johnson
通过能量过滤透射电子显微镜检查了硫化镉纳米颗粒中体积等离子体能量随颗粒尺寸的变化。这项技术可以测量单个、分离良好的粒子的等离激元能量。发现测量的等离子体激元能量随着颗粒尺寸的减小而增加，这与由于量子尺寸效应引起的等离子体激元位移的理论近似一致。纳米颗粒直径范围在1.5至3.8 nm之间，通过机械化学处理技术制备，然后电泳沉积在透射电子显微镜样品网格上。
The shift of the volume plasmon energy with particle size in cadmium sulphide nanoparticles was examined by energy filtered transmission electron microscopy. This technique allowed the plasmon energy of individual, well-separated particles to be measured. The measured plasmon energy was found to increase with decreasing particle size, in general agreement with the theoretical approximation for plasmon shifting due to the quantum size effect. The nanoparticle diameters ranged between 1.5 and 3.8 nm and they were prepared by mechanochemical processing techniques and then electrophoretically deposited on the transmission electron microscope specimen grids.