Abstract
Functionalized nanofluidics devices have recently emerged as a powerful platform for applications of energy conversion. Inspired by biological cells, we theoretically studied the effect of the interaction between the nanoparticle and the plate which formed the brush layer modified by functional zwitterionic polyelectrolyte (PE) on the bulk charge density of the nanoparticle brush layer, and the charge/discharge effect when the distance between the particle and the plate was changed. In this paper, The Poisson–Nernst–Planck equation system is used to build the theoretical model to study the interaction between the nanoparticle and the plate modified by the PE brush layer, considering brush layer charge regulation in the presence of multiple ionic species. The results show that the bulk charge density of the brush layer decreases with the decrease of the distance between the nanoparticle and the flat substrate when the interaction occurs between the nanoparticle and the plate. When the distance between the particle and the plate is about 2 nm, the charge density of the brush layer at the bottom of the particle is about 69% of that at the top, and the electric field energy density reaches the maximum value when the concentration of the background salt solution is 10 mm.
Highlights
Surface modification technology refers to the modification of nanoparticles or devices, and the brush layer is formed on the surface of the object by zwitterionic functional groups, which is generally called a functional polyelectrolyte (PE) brush layer
The objective of this study is to discuss the effect of different spacing, pH value, and background salt solution concentration on the charge density and electric field energy density of the brush body at the bottom of the particle when the PE brush-modified nanoparticles interact with the plate
We explored the interaction between the nano particle modified by the PE brush layer and the plate under different pH and background salt concentrations
Summary
Surface modification technology refers to the modification of nanoparticles or devices, and the brush layer is formed on the surface of the object by zwitterionic functional groups, which is generally called a functional polyelectrolyte (PE) brush layer. When the concentration of background salt solution reaches a certain level, the interaction between particle and plate no longer affects the local H+ concentration at the bottom of the particle
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
