ICCAS OpenIR
Diffusion of Ionic Fluorescent Probes atop Polyelectrolyte Brushes
Zhang, Cunfu1,2; Chu, Xiao1,2; Zheng, Zhongli1,2; Jia, Pengxiang1,2; Zhao, Jiang1
2011-12-29
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY B
ISSN1520-6106
Volume115Issue:51Pages:15167-15173
AbstractThe 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.
DOI10.1021/jp204612u
Indexed BySCI
Language英语
WOS IDWOS:000298214700003
PublisherAMER CHEMICAL SOC
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Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/71870
Collection中国科学院化学研究所
Corresponding AuthorZhao, Jiang
Affiliation1.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
Recommended Citation
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.
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