Critical adsorption of periodic and random polyampholytes onto charged surfaces

Author(s)

Caetano, Daniel L. Z. ; de Carvalho, Sidney J. ; Metzler, Ralf ; Cherstvy, Andrey G.

• Document type: Journal article
• Source: Physical Chemistry Chemical Physics; v. 19, n. 34, p. 23397-23413, SEP 14 2017.
• Web of Science Citations: 9

Abstract

How different are the properties of critical adsorption of polyampholytes and polyelectrolytes onto charged surfaces? How important are the details of polyampholyte charge distribution on the onset of critical adsorption transition? What are the scaling relations governing the dependence of critical surface charge density on salt concentration in the surrounding solution? Here, we employ Metropolis Monte Carlo simulations and uncover the scaling relations for critical adsorption for quenched periodic and random charge distributions along the polyampholyte chains. We also evaluate and discuss the dependence of the adsorbed layer width on solution salinity and details of the charge distribution. We contrast our findings to the known results for polyelectrolyte adsorption onto oppositely charged surfaces, in particular, their dependence on electrolyte concentration. (AU)

• FAPESP's process: 13/13151-7 - Study by computational simulation of the interaction between polyelectrolytes and macromolecules with helical charge distribution
• Grantee: Daniel Lucas Zago Caetano
• Support Opportunities: Scholarships in Brazil - Doctorate