摘要
在用琥珀酸二异辛酯磺酸钠(AOT)构建的具有长程有序结构的层状溶致液晶内,用不同方式导入预制的亲油或亲水贵金属纳米粒子,可得到纳米粒子分布在不同介观空间内的无机/有机杂合体.依据小角X射线散射和偏光显微镜结果,通过分析掺杂纳米粒子与液晶模板的相互作用,对掺杂前后体系结构的变化及制得杂合体的稳定性进行了表征.结果表明,除考虑掺杂粒子与层状模板空间的匹配外,体系中静电斥力、范德华引力和Helfrich涨落力之间的平衡是维持液晶结构稳定的基本条件.
The hydrophilic silver and hydrophobic gold nanoparticles are doped simultaneously or seperately into different regions of a lyotropic liquid crystal （LLC） with long-range structural order built with the AOT/isooctane/water ternary system. A stable lamellar hybrid is produced under suitable conditions. Polarized optical microscopy and small angle X-ray scattering are used to compare the phase changes upon various doping manners. The interactions between doped particles and surfactant bilayers are analyzed and compared in detail. Factors affecting the stability of inorganic/ organic hybrids are also discussed. The doped hydrophobie particles affect the equilibrium of van der Waals and Helfrich interactions between them and the membranes. When hydrophilic particles are incorporated into LLC aqueous region, electrostatic force will be dominant, The results suggest that it is the balance of electrostatic, van der Waals, and Helfrich forces in the lyotropic liquid crystal that determine the hybrid structure.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2006年第6期737-743,共7页
Acta Physico-Chimica Sinica
基金
国家自然科学基金(20073025
20373035
20573066)资助项目
关键词
溶致液晶
层状相
纳米粒子
小角X射线散射
Lyotropic liquid crystal, Lamellar phase, Nanoparticles, Small angle X-ray scattering
