Adsorption and depletion of polyelectrolytes in charged cylindrical system within self-consistent field theory
文献类型：期刊论文
| 作者 | Man, Xingkun1; Yang, Shuang1; Yan, Dadong1; Shi, An-Chang2 |
| 刊名 | MACROMOLECULES
 |
| 出版日期 | 2008-07-22 |
| 卷号 | 41期号:14页码:5451-5456 |
| ISSN号 | 0024-9297 |
| DOI | 10.1021/ma8003482 |
| 英文摘要 | Self-consistent field theory (SCFT) is presented to study the adsorption of flexible polyelectrolytes (PE) onto uniformly oppositely charged cylinders. We focus on the curvature effect of adsorbing surface on the adsorption-depletion phase-transition-like behavior. Numerical solutions for SCFT functions are derived. In terms of the scaling expression (C-salt* similar to p(alpha)sigma(beta)) of the critical quantities, i.e., the salt concentration C-salt*, the charge fraction p of PE chain and the area density of surface charge a, at the adsorption-depletion transition point, we divide the whole curvature dimension into two regimes, i.e., the planar regime and the cylindrical regime. In particular, we have numerically determined the crossover point of the two regimes at which the cylinder radius r(0) approximately equates to 2 times the gyration radius R-g of PE chain, or, r(0) similar to 2R(g). In the planar regime (r(0) > 2Rg), the scaling expression is invariable with surface curvature and is reduced to the planar case, or C-salt* similar to (p sigma)(2/3). In the cylindrical regime (r(0) < 2R(g)), the exponents in the scaling expression increase as r(0) decreases and - C-salt* similar to p(0.78)sigma(0.86) for a large surface curvature r(0) = 0.1R(g). Moreover, we find a critical line for the dependence of the critical radius of cylinder on the salt concentration, which separates the adsorption and depletion states. The theoretical results are in good agreement with the Monte Carlo simulations and the experimental results. |
| 语种 | 英语 |
| WOS记录号 | WOS:000257665900051 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/63895]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Yan, Dadong |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, Joint Lab Polymer Sci & Mat, BNLMS, Beijing 100080, Peoples R China 2.McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada |
| 推荐引用方式 GB/T 7714 | Man, Xingkun,Yang, Shuang,Yan, Dadong,et al. Adsorption and depletion of polyelectrolytes in charged cylindrical system within self-consistent field theory[J]. MACROMOLECULES,2008,41(14):5451-5456. |
| APA | Man, Xingkun,Yang, Shuang,Yan, Dadong,&Shi, An-Chang.(2008).Adsorption and depletion of polyelectrolytes in charged cylindrical system within self-consistent field theory.MACROMOLECULES,41(14),5451-5456. |
| MLA | Man, Xingkun,et al."Adsorption and depletion of polyelectrolytes in charged cylindrical system within self-consistent field theory".MACROMOLECULES 41.14(2008):5451-5456. |
入库方式： OAI收割
来源：化学研究所
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