高等学校化学学报 ›› 1997, Vol. 18 ›› Issue (5): 791.

• 论文 • 上一篇    下一篇

用原子力显微镜研究磷脂酸Langmuir-Blodgett双层膜中超分子结构

袁春波, 丁德胜, 顾宁, 陆祖宏, 刘举正   

  1. 东南大学化学系, 南京, 210096
  • 收稿日期:1996-06-27 出版日期:1997-05-24 发布日期:1997-05-24
  • 通讯作者: 袁春波, 男, 28岁, 博士研究生.
  • 作者简介:袁春波, 男, 28岁, 博士研究生.
  • 基金资助:

    国家自然科学基金

Atomic Force Microscopic Observation of Local Supramolecular Structure in Phosphatidic Acid Langmuir-Blodgett Films

YUAN Chun-Bo, DING De-Sheng, GU Ning, LU Zu-Hong, LIU Ju-Zheng   

  1. National Laboratory of Molecular and Biomolecular Electronics, Department of Chemistry, Southeast University, Nanjing, 210096
  • Received:1996-06-27 Online:1997-05-24 Published:1997-05-24

摘要: 用原子力显微镜研究了二棕榈酰磷脂酸(DPPA)双层LB膜的分子排列结构,发现DPPA双层膜的分子排列具有长程的位置和取向有序,为有序六方结构;同时,在DPPA双层膜的极性区磷酸基团间存在局域超分子结构.

关键词: 超分子, 磷脂酸, Langmuir-Blodgett膜, 原子力显微镜

Abstract: The Langmuir-Blodgett bilayer films of phosphatidic acid(DPPA) have been in vestigated by using atomic force microscopy in both large and nano-scale.Large scale AFMimage shows that the bilayer of DPPAis a plane film with some defects which enable us to detect the thickness of bilayer by a trace of section analysis across the defects structure.Molecularly resolved images show that the polar head groups (phosphate groups) are packed in an ordered hexagonal organization with a long range orientational and positional ordering.Intermolecular hydrogen bonding interactions between adjacent phosphate groups are first visualized and local supramolecular structures are first observed in polar region of DPPAbilayer.Some phosphate groups in polar region linked with each other through intermolecular hydrogen bonding interaction to form local supramolecular structure with a diameter of 1.5 nm in size.

Key words: Supramolecule, Phosphatidic acid, Langmuir-Blodgett film, Atomic force microscope(AFM)

TrendMD: