非晶氮化硅纳米粒子的制备及量子限制效应  

Preparation and Quantum Confinement Effects of Amorphous Si_3N_4 nanoparticles

作　　者：左都罗[1] 李道火[1] 夏宇兴[1] 刘宗才[1] 詹合英[1] 郑兆佳[1] 王柱[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所,武汉工业大学

出　　处：《无机材料学报》1994年第3期351-358,共8页Journal of Inorganic Materials

基　　金：863青年基金

摘　　要：本文报道了非晶氨化硅纳米粒子的制备及量子限制效应．原始纳米粒子由激光制粉方法获得．采用有机溶剂收集保存，使团聚大幅度减弱，ＳＴＭ发现，这种样品在ＨＯＰＧ上形成平面有序六方密排结构．用ＨＦ酸处理的方法获得了更小尺寸的纳米粒于，硬团聚基本消失．非晶氮化硅纳米粒子在高ＨＦ酸浓度酒精电解质中出现晶化．我们还研究了未经ＨＦ处理的、不同尺寸样品及ＨＦ酸处理前后同一样品的吸收光谱。谱图上有吸收峰，吸收峰随粒径减少蓝移．这证明非晶氮化硅纳米粒子具有量子限制效应．The preparation and the quantum confinement effects of amorphous St3N4 nanoparticles are reported in this paper. The initial particles are prepared by laser synthesis. When the particles are collected and preserved in organic solvent, the agglomeration between them are largely reduced, and a hexagonal closepacked structure can be found on HOPG in STM experiment with this kind of samples. The particles with even smaller size are prepaied by etching with HF acid. After erosion, the hard agglomeration is destroyed. And it is found that the amorphous show a crystallizing tendency in alcohol electrolyte with high HF acid concentration. The absorption spectra of several kinds of particles, which include as-synthesized particles with different size and the same kind of particles before and after etching, are also studied in the paper. Several peaks can be found in the spectra and the positions of the peaks shift to blue with the decrease of particle size. This shows that amorphous Si3N4 nanoparticles possess quantum confinement effects.

关 键 词：氮化硅 纳米 非晶态 量子限制效应 

分 类 号：O613.72[理学—无机化学]