info:eu-repo/semantics/article
Controlling swelling/deswelling of stimuli-responsive hydrogel nanofilms in electric fields
Fecha
2016-10Registro en:
Longo, Gabriel Sebastian; Olvera De La Cruz, Monica; Szleifer, Igal; Controlling swelling/deswelling of stimuli-responsive hydrogel nanofilms in electric fields; Royal Society of Chemistry; Soft Matter; 12; 40; 10-2016; 8359-8366
1744-683X
CONICET Digital
CONICET
Autor
Longo, Gabriel Sebastian
Olvera De La Cruz, Monica
Szleifer, Igal
Resumen
The swelling/deswelling transition of pH-sensitive, electrode-grafted, hydrogel nanofilms when exposed to electric fields is studied by theoretical analysis. In acidic conditions, the response of these films to changes in pH is dominated by network-surface interactions, while intra-network electrostatic repulsions, which are highly modulated by the adsorption of salt ions, determine material response at a higher pH. Film thickness is a non-monotonic function of solution pH and displays a local maximum, a local minimum or both, depending on the salt concentration and the applied voltage. We suggest the use of these materials in the development of biosensors and control of enzyme activity.