Diffusion of Ionic Fluorescent Probes atop Polyelectrolyte Brushes

doi:10.1021/jp204612u

CORC > 化学研究所 > 中国科学院化学研究所

	Diffusion of Ionic Fluorescent Probes atop Polyelectrolyte Brushes
	Zhang, Cunfu 1,2; Chu, Xiao 1,2; Zheng, Zhongli 1,2; Jia, Pengxiang 1,2; Zhao, Jiang 1
刊名	JOURNAL OF PHYSICAL CHEMISTRY B
	2011-12-29
卷号	115 期号:51 页码:15167-15173
ISSN号	1520-6106
DOI	10.1021/jp204612u
英文摘要	The lateral diffusion of ionic fluorescent molecules atop polyelectrolyte brushes was adopted to probe the distribution of counterions of the polyelectrolyte brushes. With a combination of single molecule fluorescence techniques, fluorescence correlation spectroscopy and single molecule fluorescence imaging, the lateral diffusion of the ionic probes (sulforhodamine B, rhodamine 6G) at the top of the model polyelectrolyte brushes with the opposite charges, poly ([2-(methylacryloyloxyl)ethyl] trimethylammonium chloride) (PMETAC) and polystyrene sulfonate (PSS), was studied with different external salt concentrations. A huge decrease of the diffusion rate of the probes was observed at salt concentrations 2-3 orders of magnitude lower than that for any detectable change of brushes thickness could be observed. The results reflect the early collapse of the top portion of the polyelectrolyte brushes and also the penetration of the probes into the brushes due to the increase of osmotic pressure by the salt level in the solution. The diffusion of the fluorescent counterion can serve as a very sensitive probe of the structure atop the polyelectrolyte brushes.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000298214700003
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/71869]
专题	中国科学院化学研究所
通讯作者	Zhao, Jiang
作者单位	1.Chinese Acad Sci, Inst Chem, Beijing Lab Mol Sci, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Cunfu,Chu, Xiao,Zheng, Zhongli,et al. Diffusion of Ionic Fluorescent Probes atop Polyelectrolyte Brushes[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2011,115(51):15167-15173.
APA	Zhang, Cunfu,Chu, Xiao,Zheng, Zhongli,Jia, Pengxiang,&Zhao, Jiang.(2011).Diffusion of Ionic Fluorescent Probes atop Polyelectrolyte Brushes.JOURNAL OF PHYSICAL CHEMISTRY B,115(51),15167-15173.
MLA	Zhang, Cunfu,et al."Diffusion of Ionic Fluorescent Probes atop Polyelectrolyte Brushes".JOURNAL OF PHYSICAL CHEMISTRY B 115.51(2011):15167-15173.