Concentration polarization effect at the deposition of charged Langmuir monolayers

Kovalchuk, V. I.; Zholkovskiy, E. K.; Bondarenko, M. P.; Starov, Victor; Vollhardt, D.

doi:10.1016/j.cis.2011.05.002

Cited by 6 publications

(6 citation statements)

References 52 publications

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“…We assume here that the substrate surface remains not charged being in contact with the solution, i.e., only one meniscus surface is charged. This situation is different from the previously considered case [8,9] of symmetrically charged meniscus surfaces shown in Fig. 1, b, where the substrate surface is covered by a similar amphiphilic monolayer film with the same surface charge density.…”

Section: Mathematical Modelcontrasting

confidence: 79%

“…Equation 9is a boundary condition for Eq. (8). The second boundary condition should be written for the clean substrate surface, which is not charged:…”

Section: Mathematical Modelmentioning

confidence: 99%

“…During the fabrication of such films by deposition of charged monolayers, the ions transfer processes between the bulk solution and the three-phase contact line region play an important role [5][6][7][8][9]. In particular, insufficient rate of such ions transfer sets a limit for the maximum possible rate, at which a stable homogeneous film is deposited on the substrate surface [2,8,9].…”

Section: Introductionmentioning

confidence: 99%

“…In Refs. [8,9], we performed a detailed simulation of the process of a film transfer to the surface of a substrate covered with a previously transferred monolayer. The presence of an already deposited monolayer at the substrate surface allowed assuming the charges of both meniscus surfaces to be the same, and the potential distribution to be symmetrical relative to the meniscus middle plane.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Concentration Polarization During Langmuir–Blodgett Films’ Deposition

2020

Nanosist. Nanomater. Nanotehnol.

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Section: Mathematical Modelcontrasting

confidence: 79%

“…Equation 9is a boundary condition for Eq. (8). The second boundary condition should be written for the clean substrate surface, which is not charged:…”

Section: Mathematical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Concentration Polarization During Langmuir–Blodgett Films’ Deposition

2020

Nanosist. Nanomater. Nanotehnol.

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“…Instead of alternating thermodynamic phases they observe alternating stripes of arachidic acid and cadmium arachidate perpendicular to the transfer direction and the surface pressure remains constant throughout the transfer. For a theoretical discussion of these phenomena, the reader is referred to the articles by Kovalchuk et al34–36…”

Section: Theoretical Model Of Pattern Formation During Monolayer Tmentioning

confidence: 99%

Structure Formation by Dynamic Self‐Assembly

Kopf

Gurevich

et al. 2012

Small

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This review summarizes the work conducted in the last decade on the fabrication of mesostructured patterns, which have lateral dimensions within the nano-and microscales, over a wafer-scaled size by means of dynamic self-assembly using Langmuir-Blodgett (LB) transfer or dip-coating. First, strategies to form mesostructures from a homogeneous Langmuir monolayer with controlled shape, size, and patterns alignment will be presented, followed by a detailed theoretical explanation of the pattern formation. In addition, the patterning of nanocrystals and other chemicals with LB transfer or other dynamic processes, such as dip-coating, will be summarized.

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Hydrodynamic dispersion in long microchannels under conditions of electroosmotic circulation: II. Electrolytes

Bernal

Kovalchuk

Zholkovskiy

et al. 2016

Microfluid Nanofluid

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This work describes the steady state transport of an electrolyte due to a stationary concentration difference in straight long channels under conditions of electroosmotic circulation. The electroosmotic flow is induced due to the slip produced at the charged channel walls. This flow is assumed to be compensated by a pressure-driven counter-flow so that the net volume flow through the channel is exactly zero. Owing to the concentration dependence of electroosmotic slip there is an involved coupling between the solute transfer, hydrodynamic flow and charge conservation. Nevertheless, for such a system the Taylor-Aris Dispersion (TAD) theory is shown to be approximately applicable locally within an inner part of the channel for a wide range of Péclet numbers (Pe) irrespective of the concentration difference. Numerical simulations reveal only small deviations from analytical solutions for the inner part of the channel. The breakdown of TAD theory occurs within boundary regions near the channel ends and -is related to the variation of the dispersion mechanism from the purely molecular diffusion at the channel ends to the hydrodynamic dispersion within the inner part of the channel. This boundary region is larger at the lower-concentration channel edge and its size increases nearly linearly with Pe number. It is possible to derive a simple analytical approximation for the inner profile of cross-section-averaged electrolyte concentration in terms of only few parameters, determined numerically. Such analytical approximations can be useful for experimental studies of concentration-polarization phenomena in long micro-channels.

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Concentration polarization effect at the deposition of charged Langmuir monolayers

Cited by 6 publications

References 52 publications

Concentration Polarization During Langmuir–Blodgett Films’ Deposition

Concentration Polarization During Langmuir–Blodgett Films’ Deposition

Structure Formation by Dynamic Self‐Assembly

Hydrodynamic dispersion in long microchannels under conditions of electroosmotic circulation: II. Electrolytes

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