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Controlling the adsorption of single poly(styrenesulfonate) sodium on NH3+-modified gold surfaces on a molecular scale

Title data

Zhu, M. ; Schneider, M. ; Papastavrou, Georg ; Akari, S. ; Möhwald, Helmuth:
Controlling the adsorption of single poly(styrenesulfonate) sodium on NH3+-modified gold surfaces on a molecular scale.
In: Langmuir. Vol. 17 (September 2001) Issue 21 . - pp. 6471-6476.
ISSN 1520-5827
DOI: https://doi.org/10.1021/la001605b

Official URL: Volltext

Abstract in another language

Densely packed amino-terminated monolayers of high degree of order were formed by self-assembly of amino-terminated alkanethiols. Negatively charged poly(styrenesulfonate) (PSS) molecules were electrostatically adsorbed on the NH3+ surface. The density of single PSS molecules on the surface was regulated by carefully controlling its concentration as well as adjusting the time in the dilute solution. Dynamic force microscopy in "tapping mode" was applied to map PSS polymers with molecular resolution. The lateral dimensions (15-25 nm) and heights (0.5-1.0 nm) of the adsorbed PSS macromolecules are in fair agreement with the theoretical diameters and the experimental estimations. The average area, volume, and charge density of single PSS patches absorbed on a positively charged surface is 378 nm(2), 122 nm(3), and 0.90e(-)/nm(2), respectively. The structure of adsorbed PSS polymers was discussed down to the molecular scale. The observations support the patch charge model of flocculants.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry II
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors > Chair Physical Chemistry II - Univ.-Prof. Dr. Andreas Fery
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry II
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors
Result of work at the UBT: No
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 13 Sep 2017 09:23
Last Modified: 13 Sep 2017 09:23
URI: https://eref.uni-bayreuth.de/id/eprint/39594