Effect of charge inversion on Poiseuille flow of multivalent electrolyte solutions in nanochannels: an atomistic study

Andres Rojano, Andrés Córdoba, Jens H. Walther, Harvey A. Zambrano

Research output: Contribution to conferenceConference abstract for conferenceResearchpeer-review

28 Downloads (Pure)

Abstract

Miniaturized devices integrated by nanoconduits have a great potential for clinical and biotechnological analysis due to amplified sensibility, faster response and increased portability. In nanoconduits, wherein the electrical double layer can occupy a considerable part of the cross section, Electro-Kinetic Phenomena (EKP) play a key role in determining transport properties of electrolytes. Hence, a comprehensive understanding of EKP and related phenomenology such as charge inversion (CI), is essential to develop more efficient nanodevices. Here, atomistic simulations of Poiseuille flow of aqueous multivalent electrolyte solutions in silica nanochannels are conducted to study the influence of CI on fluid properties. The solutions consist of water as solvent, chloride as co-ion and different amounts of counter-ions i.e. sodium, magnesium, aluminum and calcium. From atomistic trajectories, the relation between the concentration of different cations and, local and effective viscosities is analyzed considering the particular hydration shell around each ionic species. Moreover, the effect of CI on flow velocity, stick boundary condition, shear stress and friction coefficient is examined.
Original languageEnglish
Publication date2018
Number of pages1
Publication statusPublished - 2018
Event71st Annual Meeting of the APS Division of Fluid Dynamics - Georgia World Congress Center , Atlanta, United States
Duration: 18 Nov 201820 Nov 2018

Conference

Conference71st Annual Meeting of the APS Division of Fluid Dynamics
LocationGeorgia World Congress Center
CountryUnited States
CityAtlanta
Period18/11/201820/11/2018

Fingerprint Dive into the research topics of 'Effect of charge inversion on Poiseuille flow of multivalent electrolyte solutions in nanochannels: an atomistic study'. Together they form a unique fingerprint.

Cite this