CdSe纳米颗粒的大小分布

CdSe 合金是一种流行化合物半导体材料。粒子提供高荧光强度、 稳定性和单色的属性。因此,它们作为可见紫外发光材料,显示材料,以及医疗/生化荧光标记或示踪剂被积极研究。

CdSe 纳米粒子的荧光发射谱根据它们的大小会有所不同。使用小角 x 射线散射 (SAXS) 方法,可以确定大小差异几纳米的粒子。

下图为使用微反应器和它们的荧光光谱合成的五种样品的照片。

sample synthesized
fluorescence emission spectra

下图显示了SAXS数据和SAXS粒度分布测量结果。该图显示了根据粒子大小和对应粒子大小分布范围的发射光谱宽度而改变的发射波长的变化。

SAXS dataresults of a SAXS particle size distribution measurement

样品由大阪大学研究生工学院的Takahisa Omata副教授,现代工业科学技术国家研究所微空间科学实验室的Hideaki Maeda 博士和Hiroyuki Nakanura博士提供。


The S-MAX3000 pinhole SAXS camera design is available with a choice of conventional or high brilliance X-ray sources. A 3-meter, fully evacuated camera length provides both high intensity and high resolution. Coupled with a fully integrated 2-dimensional multi-wire proportional counter, the system is capable of making highly sensitive measurements from both isotropic and anisotropic materials. A wide range of sample stage attachments provide maximum flexibility in controlling environmental sample conditions during measurement. Read more...