Electrified lab on disc systems: A comprehensive review on electrokinetic applications

Kordzadeh-Kermani, Vahid; Madadelahi, Masoud; Ashrafizadeh, Seyed Nezameddin; Kulinsky, Lawrence; Martínez-Chapa, Sergio O.; Madou, Marc

doi:10.1016/j.bios.2022.114381

Cited by 22 publications

(8 citation statements)

References 163 publications

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“…By exploiting these ion transport mechanisms, various research attempts have been made to improve ion transport to the ion selective surface in electrochemical systems. In addition to generating additional ions by water ionization using bipolar membranes, micro/nanostructure engineering has been explored to modulate ion transfer on ion-selective surfaces. − One of notable examples is the prevention of dendrite formation on metal anodes of batteries by engineering the micro/nanostructure of the separator or electrode (especially, as a supporter for active materials). − Since dendrite tips grow toward the bulk electrolyte to overcome limited ion transport, and the concentrated ion flux at the tips enhances dendrite growth, efficient metal cation transport toward the cation-selective electrode surface is an important factor in achieving uniform metal deposition . As examples of the introduction of functionalized auxiliary micro/nanostructures to avoid dendrite formation, anodic aluminum oxides (AAOs) and metal–organic frameworks (MOFs) have been introduced on the surface of Li metal as functional separators. ,− Furthermore, in our recent study, we experimentally and numerically revealed that a negatively charged porous structure with submicrometer pore size as Zn metal hosting layers enhanced the electrokinetic Zn 2+ ion transport in Zn aqueous battery and effectively prevented the metal dendrite formation .…”

Section: Introductionmentioning

confidence: 99%

Differential Impact of Surface Conduction and Electroosmotic Flow on Ion Transport Enhancement by Microscale Auxiliary Structures

Park,

Cho,

Park

et al. 2024

Langmuir

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Our research investigates the impact of auxiliary structures on ion transport in electrochemical systems such as batteries and microscale desalination units, whose importance for sustainable development has increased dramatically in recent decades. The electrochemical systems typically feature ion-selective surfaces, such as electrodes and ion exchange membranes, where ion depletion can cause performance issues including metal dendrite formation and flow instability. Recent research has shown that auxiliary structures in these electrochemical systems can enhance ion transfer near ion-selective surfaces, thereby resolving the instability problem and improving the energy conversion efficiency of the system. Our study leverages recent advancements in nanoscale electrokinetics to model these auxiliary structures as pillar arrays near an ion exchange membrane in a microchannel. We examine how these structures enhance ion transports relative to the characteristic length scale of microchannel depth and pillars' proximity to the ion-selective surface. Results show that the effect of the pillars varies significantly with their placement. Specifically, in deeper microchannels, where electrokinetic convection is stronger, the closer the auxiliary structure is to the ion-selective membrane, the better the ion transfer. However, in the thinner microchannel, the proximity of the auxiliary structure to the ion selective membrane has a less significant correlation with the ion transfer. Therefore, this finding highlights the importance of spatial arrangement of the auxiliary structures in improving the performance of electrochemical devices. Conclusively, this study can help to better understand energy conversion systems such as fuel cells, salinity gradient power generation systems, and electrochemical desalination systems, where auxiliary structures can be used in the vicinity of ion-selective surfaces. Especially, our fundamental electrokinetic study provides an effective means for designing the efficient electrochemical platforms utilizing micro/nanofluidics.

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Section: Introductionmentioning

confidence: 99%

Differential Impact of Surface Conduction and Electroosmotic Flow on Ion Transport Enhancement by Microscale Auxiliary Structures

Park,

Cho,

Park

et al. 2024

Langmuir

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“…[17][18][19][20][21] This enables precise manipulation and operation of samples and reagents. [22][23][24][25][26][27][28][29][30] Valve control on centrifugal microfluidic chips stands as a pivotal technology in this field, typically classified into two categories: passive and active valves. 26,31,32 Passive valve implementation relies on factors such as chip structural design and surface treatment.…”

Section: Introductionmentioning

confidence: 99%

Multiple on-line active valves based centrifugal microfluidics for dynamic solid-phase enrichment and purification of viral nucleic acid

Li,

Wan,

Xiao

et al. 2024

Lab Chip

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“…Even though the final objective of miniaturization is to downscale the whole analytical process at once, like the so‐called micro‐total analytical systems (μ‐TAS) [9], lab‐on‐a‐disc [10], and lab‐on‐a‐chip devices [11], the concept should be considered from a wider perspective. In this sense, any advance in the miniaturization of single steps in the analytical process, such as sample preparation, contributes to the progress towards miniaturized analytical systems with the advantages they imply.…”

Section: Introductionmentioning

confidence: 99%

Ultramicroextraction as a miniaturization of the already miniaturized. A step toward nanoextraction and beyond

Azorín

Benedé

Chisvert

2023

J of Separation Science

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Miniaturization of the analytical process has been a widespread trend, and the sample preparation stage is not exempted from this downscaling. Since the introduction of microextraction techniques as miniaturization of classical extraction techniques, they have become one of the strengths in this field. However, some of the original approaches to these techniques did not fully cover all the current principles of Green Analytical Chemistry. For this reason, during the last years, much emphasis has been placed on reducing/eliminating toxic reagents, reducing the amount of the extraction phase, and searching for new greener, and more selective extractant materials. On the other hand, even though high accomplishments have been achieved, the same attention has not always been paid to reducing the amount of sample, which is essential when treating low‐availability samples such as biological samples, or in developing portable devices. In this review, we intend to give the readership an overview of the advances toward further miniaturization of microextraction techniques. Finally, a brief reflection is made on the terminology used, or that should, in our opinion, be used to term these new generation of miniaturized microextraction approaches. To this regard, the term, ‘ultramicroextraction’ is proposed to refer to those approaches beyond microextraction.

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Electrified lab on disc systems: A comprehensive review on electrokinetic applications

Cited by 22 publications

References 163 publications

Differential Impact of Surface Conduction and Electroosmotic Flow on Ion Transport Enhancement by Microscale Auxiliary Structures

Differential Impact of Surface Conduction and Electroosmotic Flow on Ion Transport Enhancement by Microscale Auxiliary Structures

Multiple on-line active valves based centrifugal microfluidics for dynamic solid-phase enrichment and purification of viral nucleic acid

Ultramicroextraction as a miniaturization of the already miniaturized. A step toward nanoextraction and beyond

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