Can I read Electrostatic Barriers to Nanoparticle Accessibility of a Porous Matrix on EtoBox?

Electrostatic Barriers to Nanoparticle Accessibility of a Porous Matrix by Wu, Haichao; Sarfati, Raphael; Wang, Dapeng; Schwartz, Daniel K is a Chemistry article available to read on EtoBox.

What is Electrostatic Barriers to Nanoparticle Accessibility of a Porous Matrix about?

Translocation from one cavity to another through a narrow constriction (i.e., a "hole") represents the fundamental elementary process underlying hindered mass transport of nanoparticles and macromolecules within many natural and synthetic porous materials, including intracellular environments. This process is complex and may be influenced by long-range (e.g., electrostatic) particle-wall interactions, transient adsorption/desorption, surface diffusion, and hydrodynamic effects. Here, we used a three-dimensional (3D) tracking method to explicitly visualize the process of nanoparticle diffusion within periodic porous nanostructures, where electrostatic interactions were mediated via ionic strength. The effects of electrostatic interactions on nanoparticle transport were surprisingly large. For example, an increase in the Debye length of only a few nanometers (in a material with a hole diameter of ∼100 nm) increased the mean cavity escape time 3-fold. A combination of computational and experimental analyses indicated that this hindered cavity escape was due to an electrostatic energy barrier in the region of the hole, which was quantitatively explained using DLVO theory. These finding

Who reads Electrostatic Barriers to Nanoparticle Accessibility of a Porous Matrix?

Author

Wu, Haichao; Sarfati, Raphael; Wang, Dapeng; Schwartz, Daniel K

Publisher

American Chemical Society; American Chemical Society (ACS); Research Square (ISSN 0002-7863)

Published

2020

Language

EN

Field

Chemistry (Physical Sciences)