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纳米材料由于其中粒子直径与晶体中电子的德布罗意波长相当,显现许多特异的物理和化学性质,引起了许多科学工作者的浓厚兴趣。由于纳米材料中既有由约50％的原子组成的长短程均有序的晶粒,又有由约50％原子组成的既无长程秩序又无短程秩序的界面,可以预料这种材料会有其它固体材料所没有的独特的体相和界面性质。由于纳米材料是由纳米尺度粒子经加压后制得,因此开展纳米粒子的性质研究是纳米材料研究的基础而又重要的一个环节。为此我们进行了半导体纳米微粉α-Fe_2O_3的光声谱测量和研究。
Nanomaterials have attracted a great deal of interest from many scientists due to their many specific physical and chemical properties, due to the fact that the particle diameter corresponds to the de Broglie wavelength of electrons in the crystal. Because nanomaterials have both long and short orderly ordered grains composed of about 50% of the atoms and an interface of about 50% of atoms that has neither long-range nor short-range order, it is expected that such materials will have Other solid materials do not have unique bulk and interface properties. Since nanomaterials are prepared by pressing nanoscale particles, the study of the properties of nanostructured nanoparticles is an important and important part of nanomaterials research. To this end, we carried out the photoelectron spectroscopy measurement and research of semiconductor nano-powder α-Fe_2O_3.