Liquid friction on charged surfaces: From hydrodynamic slippage to electrokinetics

Joly, Laurent; Ybert, Christophe; Trizac, Emmanuel; Bocquet, Lydéric

doi:10.1063/1.2397677

Cited by 209 publications

(246 citation statements)

References 38 publications

(101 reference statements)

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“…As it can be of order 10 or more, Joly et al propose that this effect can be at the origin of the large zeta potentials measured on hydrophobic surfaces, in spite of weak expected surface charge. 170,171 The same trend has been observed by Bouzigues et al who used evanescent waves to perform measurements of static and dynamic potentials of silanized glass, 172 and Churaev et al observed a decrease in the zeta potential on glass when a nonionic surfactant was added to the solution, which they attribute to the diminution of slip. 173 More experiments will be needed to confirm that hydrophobic surface potentials are enhanced by slip; we have to note that the usual explanation of their high potential is the occurrence of preferential adsorption of anions (OH À and Cl À ).…”

Section: Coupling With Electrokineticssupporting

confidence: 53%

“…The interest of slip in such devices is to possibly lead to a much better efficiency, in relation with the enhanced streaming potentials already discussed. 171 Ren and Stein have modeled the role of slippage in streaming potential-based energy conversion: it decreases the fluidic impedance and increases the streaming conductance. 178 They show that these effects are moderated by a decrease in the electrical impedance (dissipation); a diverging slip length could lead to almost 100% efficiency (see Figure 5.22).…”

Section: Coupling With Electrokineticsmentioning

confidence: 99%

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Nanofluidic Devices and Their Potential Applications

Abgrall¹,

Bancaud²,

Joseph³

2010

Microfluidic Devices in Nanotechnology

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Section: Coupling With Electrokineticssupporting

confidence: 53%

Section: Coupling With Electrokineticsmentioning

confidence: 99%

Nanofluidic Devices and Their Potential Applications

Abgrall¹,

Bancaud²,

Joseph³

2010

Microfluidic Devices in Nanotechnology

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“…Bakli and Chakraborty also found evidence of salt--specific effects related to the ion hydration strength (49), and extended their investigation to electrokinetic energy conversion (80). Joly et al (81) investigated the effect of salt on slip length with charged confining walls. In that case, the slip length was mainly controlled by the surface charge, while salt concentration effects were negligible.…”

Section: Graphene -Based Membranesmentioning

confidence: 99%

The Carbon-Water Interface: Modeling Challenges and Opportunities for the Water-Energy Nexus

Striolo

Michaelides

Joly

2016

Annu. Rev. Chem. Biomol. Eng.

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Providing clean water and sufficient affordable energy to all without compromising the environment are key priorities of the scientific community. Many recent studies have focused on carbon--based devices in the hope of addressing these grand challenges, justifying and motivating detailed studies of water in contact with carbonaceous materials. Such studies are becoming increasingly important because of the miniaturization of newly proposed devices, with ubiquitous nano--pores, large surface--to--volume ratio, and many, perhaps most of the water molecules at contact with a carbon--based surface. In this brief review we discuss some recent advances obtained by simulations and experiments in the development of carbon--based materials for applications in water desalination. We suggest possible ways forward, with particular emphasis on the synergistic combination of experiments and simulations, with simulations now sometimes offering sufficient accuracy to provide fundamental insights. We also point the interested reader to recent works that complement our short summary on the state of the art of this important and fascinating field. 2 Introduction: the importance of reverse osmosis in water desalinationThe scientific community is facing the challenge of providing technological solutions for the water--energy nexus while preserving the environment. Carbon--based devices have been developed both for desalinating water and for storing energy. Such devices are characterized by vast carbon--water interfaces, due to the ubiquity of nano--pores. It is indeed possible that many, perhaps most water molecules within such devices come in contact with the carbon surface. Hence, a detailed understanding of water--carbon interfaces is necessary to ensure progress. Here, we review some recent advances obtained by atomistic simulations and experiments on this field. Traditional water desalination approaches such as multi--flash distillations are widely used, but require large amounts of energy. As such, they are not sustainable in the long run. Reverse osmosis (RO) has become the technology of choice for most new installations. Two innovations are considered to be responsible for the wide application of RO. The first was the introduction of thin film composite membranes; the other was the implementation of energy recovery devices that re--use part of the energy present in pressurized brine (i.e., pressure exchangers and efficient pumps) (1, 2). Although RO is mature and reliable, it remains energy intensive (3--5). At its core are membranes permeable to water and impermeable to salt. The state--of--the art membranes, based on polyamide thin film composites, degrade in the presence of chlorine (which makes disinfection difficult) and are prone to fouling (6). Many believe that 'in order for desalination to live up to the water challenges of the 21 st century a step--change is needed in RO membrane technology' (7). Although high mechanical strength as well as resistance to degradation and fouling are prerequisites to practical appli...

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“…The relation was modified for non-wetting charged surfaces by considering the fluid slip effect [65], which was experimentally validated [66]. Surface roughness is another factor that needs to be taken into consideration.…”

Section: Introductionmentioning

confidence: 99%

Effects of Micromachining Processes on Electro-Osmotic Flow Mobility of Glass Surfaces

et al. 2013

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Silica glass is frequently used as a device material for micro/nano fluidic devices due to its excellent properties, such as transparency and chemical resistance. Wet etching by hydrofluoric acid and dry etching by neutral loop discharge (NLD) plasma etching are currently used to micromachine glass to form micro/nano fluidic channels. Electro-osmotic flow (EOF) is one of the most effective methods to drive liquids into the channels. EOF mobility is affected by a property of the micromachined glass surfaces, which includes surface roughness that is determined by the manufacturing processes. In this paper, we investigate the effect of micromaching processes on the glass surface topography and the EOF mobility. We prepared glass surfaces by either wet etching or by NLD plasma etching, investigated the surface topography using atomic force microscopy, and attempted to correlate it with EOF generated in the micro-channels of the machined glass. Experiments revealed that the EOF mobility strongly depends on the surface roughness, and therefore upon the fabrication process used. A particularly strong dependency was observed when the surface roughness was on the order of the electric double layer thickness or below. We believe that the correlation described in this paper can be of great help in the design of micro/nano fluidic devices.

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Liquid friction on charged surfaces: From hydrodynamic slippage to electrokinetics

Cited by 209 publications

References 38 publications

Nanofluidic Devices and Their Potential Applications

Nanofluidic Devices and Their Potential Applications

The Carbon-Water Interface: Modeling Challenges and Opportunities for the Water-Energy Nexus

Effects of Micromachining Processes on Electro-Osmotic Flow Mobility of Glass Surfaces

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