Single chain contraction and re-expansion of polystyrene sulfonate: a study on its re-entrant condensation at single molecular level
文献类型：期刊论文
| 作者 | Jia, Pengxiang1; Zhao, Jiang1,2 |
| 刊名 | Journal of chemical physics
 |
| 出版日期 | 2009-12-21 |
| 卷号 | 131期号:23页码:4 |
| 关键词 | Aggregation Dissolving Fluorescence Liquid structure Polymer electrolytes Polymer solutions Precipitation |
| ISSN号 | 0021-9606 |
| DOI | 10.1063/1.3276278 |
| 通讯作者 | Zhao, jiang(jzhao@iccas.ac.cn) |
| 英文摘要 | Single chain conformation of a polyelectrolyte (polystyrene sulfonate, pss(-)na(+)) during its re-entrant condensation was studied by fluorescence correlation spectroscopy (fcs) with single molecule sensitivity. the contraction and re-expansion of pss(-)na(+) chain were observed with the addition of counterions of different valencies. the formation of aggregation and precipitation of pss(-)na(+) and its redissolution were observed in accordance with the chain contraction and re-expansion process for the pss(-)na(+) chain upon the addition of trivalent la(3+) ion. chain contraction and re-expansion of the pss(-)na(+) chain were also observed with the addition of monovalent cs(+) and divalent ca(2+) ions, under which condition, the re-entrant condensation was not observed. the results demonstrate that the high sensitivity of fcs can really study single pss(-)na(+) chain under extremely dilute situation. |
| WOS关键词 | CHARGED POLYELECTROLYTE SOLUTIONS ; MULTIVALENT SALT-SOLUTIONS ; ANGLE NEUTRON-SCATTERING ; FLEXIBLE POLYELECTROLYTES ; DNA CONDENSATION ; LIGHT-SCATTERING ; COLLAPSE ; ION ; COUNTERIONS ; PRECIPITATION |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Atomic, Molecular & Chemical |
| 语种 | 英语 |
| WOS记录号 | WOS:000273036300003 |
| 出版者 | AMER INST PHYSICS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2396051 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Zhao, Jiang |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Joint Lab Polymer Sci & Mat, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jia, Pengxiang,Zhao, Jiang. Single chain contraction and re-expansion of polystyrene sulfonate: a study on its re-entrant condensation at single molecular level[J]. Journal of chemical physics,2009,131(23):4. |
| APA | Jia, Pengxiang,&Zhao, Jiang.(2009).Single chain contraction and re-expansion of polystyrene sulfonate: a study on its re-entrant condensation at single molecular level.Journal of chemical physics,131(23),4. |
| MLA | Jia, Pengxiang,et al."Single chain contraction and re-expansion of polystyrene sulfonate: a study on its re-entrant condensation at single molecular level".Journal of chemical physics 131.23(2009):4. |
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来源：中国科学院大学
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