The water–amorphous silica interface: Analysis of the Stern layer and surface conduction

Zhang, Hui; Hassanali, Ali; Shin, Yun Kyung; Knight, Chris; Singer, Sherwin J.

doi:10.1063/1.3510536

Cited by 63 publications

(74 citation statements)

References 107 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Numerous models have been recently reported in the literature in an effort to resolve these drawbacks. [18][19][20][21][22][23][24][25][26][27][28] Towards this, significant efforts have been directed to aptly account for finitesized effects of the ionic species. The Poisson-Boltzmann model, which considers the ions to be point sized, grossly over-predicts the surface charge density and overall concentrations for high surface charges and highly concentrated solutions.…”

Section: Introductionmentioning

confidence: 99%

Regimes of streaming potential in cylindrical nano-pores in presence of finite sized ions and charge induced thickening: An analytical approach

Bandopadhyay

Goswami

Chakraborty

2013

The Journal of Chemical Physics

View full text Add to dashboard Cite

We obtain approximate analytical expressions for the streaming potential and the effective viscosity in a pure pressure-driven flow through a cylindrical pore with electrokinetic interactions, duly accounting for the finite size effects of the ionic species (steric effects) and charge-induced thickening. Our analytical results show a remarkable agreement with the numerical solution even for high surface potentials and small channel radii. We demonstrate a consistent increment in the predicted value of the streaming potential and effective viscosity when finite size effects of the ionic species are accounted for. In addition to this, we account for the radial variation of in the viscosity of the fluid due to charge-induced thickening. We show that this so-called viscoelectric effect leads to a decrease in the induced streaming potential especially at high steric factors and high surface potentials. However, the viscoelectric effect, which is prominent at high zeta potential and narrow channels, does not cause significant changes in the electrokinetic conversion efficiency. These results shed light on the interesting confluence of the steric factor, the channel radius, the electrical double layer screening length, and the surface charge density in conjunction with the charge induced thickening, and thus provide ion-size dependent analytical framework for accurate system design and better interpretation of electrokinetic data.

show abstract

Section: Introductionmentioning

confidence: 99%

Regimes of streaming potential in cylindrical nano-pores in presence of finite sized ions and charge induced thickening: An analytical approach

Bandopadhyay

Goswami

Chakraborty

2013

The Journal of Chemical Physics

View full text Add to dashboard Cite

show abstract

“…In the 1970's and 1980's Kornyshev introduced a family of nonlocal models for the dielectric which suggested its decomposition into high-frequency electronic transitions leading to fluctuations in the dipole moment, fast oscillations due to infrared intramolecular vibration of dipoles, and Debye fluctuations of the dipole orientations that hinder rotation of dipoles [52][53][54]. A final resolution is not yet at hand within the literature [55][56][57]. We do not propose a form for the functional dependency, rather we propose a framework in which the functional form should reside.…”

Section: Extensions To Incorporation Of Ionic Conductionmentioning

confidence: 99%

Variational Models of Network Formation and Ion Transport: Applications to Perfluorosulfonate Ionomer Membranes

Gavish

Jones

et al. 2012

Polymers

View full text Add to dashboard Cite

We present the functionalized Cahn-Hilliard (FCH) energy, a continuum characterization of interfacial energy whose minimizers describe the network morphology of solvated functionalized polymer membranes. With a small set of parameters the FCH characterizes bilayer, pore-like, and micelle network structures. The gradient flows derived from the FCH describe the interactions between these structures, including the merging and pinch-off of endcaps and formation of junctions central to the generation of network morphologies. We couple the FCH gradient flow to a model of ionic transport which incorporates entropic effects to localize counter-ions, yielding a flow which dissipates a total free energy, and an expression for the excess electrochemical potential which combines electrostatic and entropic effects. We present applications to network bifurcation and membrane casting.

show abstract

“…In an electric field, an electrical double layer forms close to the interface surrounding the Si-O-Si domains, which becomes distorted when submitted to an alternating electric field. 37,38 This creates the so-called EC polarization of the medium. 39 We believe that the S-parameter response at the low frequencies, below 300 MHz, corresponds to the EC polarization of the Stern layer around the Si-O-Si domains /grains, while the response at higher frequencies is dominated by the Maxwell-Wagner polarization.…”

Section: Modelingmentioning

confidence: 99%

Low Frequency Radio Wave Detection of Electrically Active Defects in Dielectrics

Obeng

Okoro

Amoah

et al. 2015

ECS J. Solid State Sci. Technol.

View full text Add to dashboard Cite

In this paper, we discuss the use of low frequency (up to 300 MHz) radio waves (RF) to detect and characterize electrical defects present in the dielectrics of emerging integrated circuit devices. As an illustration, the technique is used to monitor the impact of thermal cycling on the RF signal characteristics (S-parameters, such as S11 and S21) of electrically active defects in three dimensional (3D) interconnects. The observed changes in the electrical characteristics of the interconnects were traced to changes in the chemistry of the isolation dielectric used in the through silicon via (TSV) construction; specifically to the conversion of chemical intermediates such as non-bridging silanol (Si-OH) to bridging siloxane (Si-O-Si). We suggest that these “chemical defects” inherent in the ‘as-manufactured’ products may be responsible for some of the unexplained early reliability failures observed in TSV enabled 3D devices. This low frequency RF technique could be optimized to complement, and in some cases compete favorably with, other thin film metrology techniques, such as ellipsometry and Fourier transform infrared spectroscopy (FTIR), for mass production environments.

show abstract

The water–amorphous silica interface: Analysis of the Stern layer and surface conduction

Cited by 63 publications

References 107 publications

Regimes of streaming potential in cylindrical nano-pores in presence of finite sized ions and charge induced thickening: An analytical approach

Regimes of streaming potential in cylindrical nano-pores in presence of finite sized ions and charge induced thickening: An analytical approach

Variational Models of Network Formation and Ion Transport: Applications to Perfluorosulfonate Ionomer Membranes

Low Frequency Radio Wave Detection of Electrically Active Defects in Dielectrics

Contact Info

Product

Resources

About