Freeze-fracture transmission electron microscopy studies on the self-assemblies of amphiphilic solutions  

作　　者：郝京诚 黄建滨 徐桂英 郑利强 刘维民 H.Hoffmann 

机构地区：[1]Key Laboratory for Colloid and Interface Chemistry,Shandong University,Ministry of Education,Jinan 250100 China Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000 China [2]College of Chemistry,Peking University,Beijing 100871 China [3]Key LaboratOry for Colloid and Interface Chemistry,Shandong University,Ministry of Education,Jinan 250100 China [4]Key Laboratory for Colloid and Interface Chemistry,Shandong University,Ministry of Edcation,Jinan 250100 China [5]Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000 China [6]Physical Chemistryl,Bayreuth University,Bayreuth 95440 Germany

出　　处：《Science China Chemistry》2003年第6期567-576,共10页中国科学（化学英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Grant No.20243007);the Alexander von Humboldt Foundation;the Program of Hundreds Talent of the Chinese Academy of Sciences;Shandong University(Hao Jingcheng); by the National Natural Science Foundation of China(Grant No.50275142); the Minis try of Science;Technology ofChina(Grant No.2202AA302609)(LiuWeimin).

摘　　要：Self-assemblies of amphiphiles in solutions were investigated by using freeze-fracture transmission electron microscopy(FF-TEM). Especially, vesicles were characterized by FF-TEM and the transition of self-assemblies was determined. The stacked lamellar Lα-phase was prepared without shear forces by a chemical reaction. The stacked lamellar Lα-phase can be transformed into multilamellar vesicles by the shearing forces that occur when the stacked lamellar Lα-phase sample is turned upside down a few times. The multilamellar vesicles can also be transformed into unilamellar vesicles by high shearing forces. These transitions were demonstrated by FF-TEM measurements. Zn2+-induced vesicle formation in the single-chain surfactant solutions was first achieved.Self-assemblies of amphiphiles in solutions were investigated by using freeze-fracture transmission electron microscopy (FF-TEM). Especially, vesicles were characterized by FF-TEM and the transition of self-assemblies was determined. The stacked lamellar Lα-phase was prepared without shear forces by a chemical reaction. The stacked lamellar Lα-phase can be transformed into multilamellar vesicles by the shearing forces that occur when the stacked lamellar Lα-phase sample is turned upside down a few times. The multilamellar vesicles can also be transformed into unilamellar vesicles by high shearing forces. These transitions were demonstrated by FF-TEM measurements. Zn2+-induced vesicle formation in the single-chain surfactant solutions was first achieved.

关 键 词：FREEZE-FRACTURE transmission ELECTRON microscopy  amphiphiles  vesicles  SHEAR force. 

分 类 号：O645[理学—物理化学]