C_(60)-PMMA复合膜的纳米结构研究  

Nano-Structural Studies on C_(60)/PMMA Composite Films

作　　者：李英兰[1] 陈光华[2] 邹云娟[2] 王波[2] 严辉[2] 

机构地区：[1]兰州大学物理科学与技术学院,甘肃兰州730000 [2]北京工业大学材料学院,北京100022

出　　处：《无机材料学报》2002年第1期167-171,共5页Journal of Inorganic Materials

摘　　要：采用化学有机沉积法，在Ｓｉ（１００）、ＫＢｒ压片及微栅衬底上分别制备了 Ｃ６０／ＰＭＭＡ重量比不同的Ｃ６０－ＰＭＭＡ复合膜．红外光谱分析表明，Ｃ６０分子已均匀地分布在Ｃ６０－ＰＭＭＡ复合膜中．利用Ｘ射线衍射（ＸＲＤ）谱和透射电子显微镜（ＴＥＭ）研究了该复合膜的结构，结果显示原来均匀分布在ＰＭＭＡ中的Ｃ６０分子经过扩散趋向于形成非晶或晶化的Ｃ６０颗粒．经过退火，以面心立方结构单晶形式存在的Ｃ６０颗粒的尺寸为３０～１００ｎｍ，且以规则的几何形体分散在ＰＭＭＡ连续相中．玻耳兹曼能量分布规律能够较好地解释，提高Ｃ６０含量或退火温度，晶化Ｃ６０颗粒尺寸增大的现象．C-60-polymethyl methacylate (PMMA) composite films were prepared by the chemical organic deposition method with the different weight ratios C-60 to PMMA. The measurements of Fourier transform infrared (FTIR) spectra for the as-prepared films show that C-60 molecules are embedded into PMMA. X-ray diffraction (XRD) and transmission electron microscope (TEM) were employed to study the structures of the films. The measurement results suggest that C-60 molecules in the films tend to aggregate each other and to form some tiny C-60 crystallites due to the increase in the C-60 content. TEM observition shows that regular C-60 crystallites of about 30similar to100nm are distributed homogeneously in the PMMA film. The selective area diffraction indicates that the crystallized particles in the films are single crystal ones with fcc structure. The theory of Boltzmann distribution well explains the phenomenon that C-60 crystallite size increases with increasing C-60 content or annealed at enhanced temperature.

关 键 词：纳米结构 C60-PMMA复合膜 复合材料 退火 化学有机沉积 富勒烯 碳60 聚甲基丙烯酸甲酯 制备 

分 类 号：TB383[一般工业技术—材料科学与工程] TB332