文献类型：期刊文献

中文题名：用LB膜技术组装α-Fe_2O_3超微粒的研究

英文题名：Study of Fabricating α-Fe_2O_3 Ultrafine Particles by Langmuir-Blodgett Film Technology

作者：刘成林[1];李远光[2];钟菊花[2];刘百祥[2];张兆奎[2];顾建华[3];陆祖宏[3]

机构：[1]江苏省盐城师范专科学校物理系;[2]华东理工大学物理系;[3]东南大学分子电子学实验室

年份：1998

卷号：11

期号：2

起止页码：156

中文期刊名：Chinese Journal of Chemical Physics

外文期刊名：化学物理学报（英文）

收录：CSTPCD;;Scopus;CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：α-Fe2O3;超微粒;LB膜;组装;氧化铁;磁记录材料

外文关键词：α-Fe_2O_3 ultrafine particles\ Ultrasonic dispersion\ LB film technology\ Fabrication Lamellar-structure\ Ordered-alignment

摘要：用超声分散的方法将α－Ｆｅ２Ｏ３超微粒分散于硬脂酸／正已烷／氯仿溶液中，用ＬＢ膜技术进行有序组装。结果显示：α－Ｆｅ２Ｏ３超微粒能均匀地分散在有机溶剂中，α－Ｆｅ２Ｏ３超微粒／硬脂酸单分子膜的成膜性能良好，复合膜中的α－Ｆｅ２Ｏ３超微粒有一定的有序性，α－Ｆｅ２Ｏ３超微粒硬脂酸复合ＬＢ膜具有层状结构。
The α-Fe_2O_3 ultrafine particles were dispersed in the solutions of stearic acid/n-hexand/chloroform by the ultrasonic method,and fabricated by the Langmuir-Blodgett film technology.They were investigated by mearsof π-A isotherms,UV-visible absorption,IR spectrum,Small-angle X-ray diffraction,TEM and electron diffraction.The results showed:The single molecular area of α-Fe_2O_3 ultrafine partiches/stearic acid composite monolager is bigger than that of stearic acid.It is found that the absorption band edges of α-Fe_2O_3 ultrafine particles modificated by stearic acid significantly shift to the red,which is in contrast with that of bulk Fe_2O_3.This is caused by the influence of dielectric confinement effect.There are two grades Brag-peak appeared in the small-angle X-ray diffraction spectra indicated that the α-Fe_2O_3 ultrafine particles/stearic acid composite film had lamellar-structure.The littler orientation can be induced when there are lattic matching relations between stearic acid monolager and α-Fe_2O_3 ultrafine particles.