Literature by the same author
plus at Google Scholar

Bibliografische Daten exportieren
 

Electrogelation: Controlled Fast Formation of Micrometer-Thick Films from Low-Molecular Weight Hydrogelators

Title data

Raßmann, Nadine ; Weber, Melina ; Glaß, Roman E. J. ; Kreger, Klaus ; Helfricht, Nicolas ; Schmidt, Hans-Werner ; Papastavrou, Georg:
Electrogelation: Controlled Fast Formation of Micrometer-Thick Films from Low-Molecular Weight Hydrogelators.
In: Langmuir. Vol. 39 (2023) Issue 48 . - pp. 17190-17200.
ISSN 1520-5827
DOI: https://doi.org/10.1021/acs.langmuir.3c02270

Official URL: Volltext

Project information

Project financing: Andere

Abstract in another language

The controlled electrochemical deposition of hydrogels from low-molecular weight hydrogelators (LMWHGs) allows for the defined formation of thin films on electrodes. Here, the deposition of fibrillar networks consisting of N,N′,N″-tris(4-carboxyphenylene)-1,3,5-benzenetricarboxamide (BTA) onto ultraflat gold electrodes has been studied. This process, also termed electrogelation, is based on a local change in the pH due to electrolysis of water at the electrode. The protonation of the BTA sodium salt leads to self-assembly into supramolecular fibrillar structures mainly via hydrogen bonding of the uncharged molecules. The resulting hydrogel film was characterized in terms of its thickness by atomic force microscopy (AFM). Two different AFM-based techniques have been used: ex situ imaging of dried films and in situ nanoindentation of the hydrated hydrogel films. The deposition process was studied as a function of gelator concentration, applied potential, and gelation time. These parameters allow control of the film thickness to a high degree of accuracy within a few tenths of nanometers. Film formation takes place in a few seconds at moderate applied potentials, which is beneficial for biomedical applications. The results obtained for the BTA presented here can be transferred to any type of pH-responsive LMWHG and many reversibly formed hydrogel films.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Electrodes; Gelation; Gold; Hydrogels; Thickness
Institutions of the University: 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 > Chair Physical Chemistry II > Chair Physical Chemistry II - Univ.-Prof. Dr. Georg Papastavrou
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry I
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry I > Chair Macromolecular Chemistry I - Univ.-Prof. Dr. Hans-Werner Schmidt
Research Institutions > Affiliated Institutes > Bavarian Polymer Institute (BPI)
Graduate Schools > University of Bayreuth Graduate School
Graduate Schools > Elite Network Bavaria
Graduate Schools > Elite Network Bavaria > Macromolecular Science
Result of work at the UBT: Yes
DDC Subjects: 500 Science
500 Science > 540 Chemistry
Date Deposited: 07 Dec 2023 06:39
Last Modified: 07 Dec 2023 06:39
URI: https://eref.uni-bayreuth.de/id/eprint/87898