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	Single chain contraction and re-expansion of polystyrene sulfonate: a study on its re-entrant condensation at single molecular level
	Jia, Pengxiang1; Zhao, Jiang1,2
刊名	Journal of chemical physics
	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
出版者	AMER INST PHYSICS
WOS记录号	WOS:000273036300003
内容类型	期刊论文
URI标识	http://www.corc.org.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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