中国物理B ›› 2014, Vol. 23 ›› Issue (3): 38202-038202.doi: 10.1088/1674-1056/23/3/038202

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Self-consistent field theory of adsorption of flexible polyelectrolytes onto an oppositely charged sphere

童朝阳a, 诸跃进b, 童朝晖b   

  1. a Department of Physics, Hunan Normal University, Changsha 415001, China;
    b Department of Physics, Ningbo University, Ningbo 315211, China
  • 收稿日期:2013-06-10 修回日期:2013-09-03 出版日期:2014-03-15 发布日期:2014-03-15
  • 基金资助:
    Project supports by the National Natural Science Foundation of China (Grant Nos. 21074062 and 11174163), the Scientific Research Foundation for the Returned Overseas Chinese Scholars, Ministry of Education of China, and the Scientific Research Fund of Zhejiang Provincial Educational Department, China (Grant No. Y200907455).

Self-consistent field theory of adsorption of flexible polyelectrolytes onto an oppositely charged sphere

Tong Zhao-Yang (童朝阳)a, Zhu Yue-Jin (诸跃进)b, Tong Chao-Hui (童朝晖)b   

  1. a Department of Physics, Hunan Normal University, Changsha 415001, China;
    b Department of Physics, Ningbo University, Ningbo 315211, China
  • Received:2013-06-10 Revised:2013-09-03 Online:2014-03-15 Published:2014-03-15
  • Contact: Tong Chao-Hui E-mail:tongchaohui@nbu.edu.cn
  • Supported by:
    Project supports by the National Natural Science Foundation of China (Grant Nos. 21074062 and 11174163), the Scientific Research Foundation for the Returned Overseas Chinese Scholars, Ministry of Education of China, and the Scientific Research Fund of Zhejiang Provincial Educational Department, China (Grant No. Y200907455).

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摘要： The adsorption of flexible polyelectrolyte (PE) with the smeared charge distribution onto an oppositely charged sphere immersed in a PE solution is studied numerically with the continuum self-consistent field theory. The power law scaling relationships between the boundary layer thickness and the surface charge density and the charge fraction of PE chains revealed in the study are in good agreement with the existing analytical result. The curvature effect on the degree of charge compensation of the total amount of charges on the adsorbed PE chains over the surface charges is examined, and a clear understanding of it based on the dependences of the degree of charge compensation on the surface charge density and the charge fraction of PE chains is established.

关键词: polyelectrolyte, adsorption, self-consistent field theory

Abstract: The adsorption of flexible polyelectrolyte (PE) with the smeared charge distribution onto an oppositely charged sphere immersed in a PE solution is studied numerically with the continuum self-consistent field theory. The power law scaling relationships between the boundary layer thickness and the surface charge density and the charge fraction of PE chains revealed in the study are in good agreement with the existing analytical result. The curvature effect on the degree of charge compensation of the total amount of charges on the adsorbed PE chains over the surface charges is examined, and a clear understanding of it based on the dependences of the degree of charge compensation on the surface charge density and the charge fraction of PE chains is established.

Key words: polyelectrolyte, adsorption, self-consistent field theory

中图分类号:  (Polyelectrolytes)

  • 82.35.Rs
68.47.Pe (Langmuir-Blodgett films on solids; polymers on surfaces; biological molecules on surfaces) 41.20.Cv (Electrostatics; Poisson and Laplace equations, boundary-value problems)