Issue 2, 2024

1H-NMR studies on the volume phase transition of DNA-modified pNipmam microgels

Abstract

DNA functionalized pNipmam microgels, which have recently been introduced, are examined at different concentrations of sodium chloride and in PBS solutions via temperature dependent 1H-NMR measurements and are compared to pure pNipmam microgels. We show that the DNA modification shifts the volume phase transition temperature towards lower temperatures and the addition of salt and PBS further supports this effect in both materials. Thermodynamic values, i.e. enthalpy, entropy and Gibbs free energy, are determined via a non-linear fit which can be applied directly to the measurement data without further linearization.

Graphical abstract: 1H-NMR studies on the volume phase transition of DNA-modified pNipmam microgels

Supplementary files

Article information

Article type
Paper
Submitted
25 Aug 2023
Accepted
29 Nov 2023
First published
30 Nov 2023

Soft Matter, 2024,20, 330-337

1H-NMR studies on the volume phase transition of DNA-modified pNipmam microgels

R. Hengsbach, G. Fink and U. Simon, Soft Matter, 2024, 20, 330 DOI: 10.1039/D3SM01124K

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