对纳米微粒制备教学实验中微粒尺寸表征的探讨

Discussions on the characteristics of particle size in the pedagogical experiments of nanoparticle preparation experiment

讨论了纳米微粒制备教学实验的尺寸表征方法.用称重法得出纳米微粒的视比重,TEM法观测纳米微粒的粒径分布.发现视比重与粒径分布之间有定量的依存关系,可以将视比重换算成微粒尺寸,并对不同制备条件下的Cu纳米粉的物理参量与微粒尺寸之间的关系进行了探讨.

A method measuring the size of nanoparticles attribute to pedagogical experiments is investigated. By comparing the apparent gravity of nanoparticles from weighing method with the particle size distribution from TEM imaging, a strong correlation between the apparent gravity and particle size distribution of nanoparticles is gotten. Using the correlation, the apparent gravity can be converted into the particle size. The dependence of preparation parameters and the nanoparticles size is also investigated.