Electrokinetic transport of nanoparticles in functional group modified nanopores

Zhou, Teng; He, Xiaohan; Zhao, Juncheng; Shi, Liuyong; Wen, Liping

doi:10.1016/j.cclet.2022.07.010

Cited by 8 publications

(3 citation statements)

References 54 publications

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“…This technique is widely used in the applications of particle separation [53,54], DNA analysis [55,56], drug delivery [57,58], and so on. The EP of particles and molecules in bulk liquids and microchannels has been investigated extensively [59][60][61][62][63][64][65]. However, with confined spaces, the EP phenomena in nanochannels are complicated, and the conventional theories of EP lose their applicability.…”

Section: Electrophoresismentioning

confidence: 99%

Electrokinetic transport phenomena in nanofluidics and their applications

Sun

Jiang

et al. 2023

Electrophoresis

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Much progress has been made in the electrokinetic phenomena inside nanochannels in the last decades. As the dimensions of the nanochannels are compatible to that of the electric double layer (EDL), the electrokinetics inside nanochannels indicate many unexpected behaviors, which show great potential in the fields of material science, biology, and chemistry. This review summarizes the recent development of nanofluidic electrokinetics in both fundamental and applied research. First, the techniques for constructing nanochannels are introduced to give a guideline for choosing the optimal fabrication technique based on the specific feature of the nanochannel. Then, the theories and experimental investigations of the EDL, electroosmotic flow, and electrophoresis of nanoparticles inside the nanochannels are discussed. Furthermore, the applications of nanofluidic electrokinetics in iontronics, sensing, and biomolecule separation fields are summarized. In Section 5, some critical challenges and the perspective on the future development of nanofluidic electrokinetics are briefly proposed.

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Section: Electrophoresismentioning

confidence: 99%

Electrokinetic transport phenomena in nanofluidics and their applications

Sun

Jiang

et al. 2023

Electrophoresis

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“…Owing to their good tensile properties, flexible strain sensors are commonly used in specific wearable devices and flexible electronics − to monitor muscle and joint motion through skin deformation. − However, several challenges must be addressed for practical application of these sensors. The first challenge is to improve the torsional interference resistance of the sensor.…”

Section: Introductionmentioning

confidence: 99%

Flexible Strain Sensor Based on Copper/Graphene Composite Films

Zhu,

Zhang,

Lin

et al. 2023

ACS Appl. Nano Mater.

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This study analyzed a flexible strain sensor with torsional low interference, waterproofing, and self-adhesive properties using a copper/ graphene microcrack composite film as a strain-sensitive layer and a selfadhesive silica gel as a waterproofing and self-adhesive layer. The sensor exhibits a wide response range (with a strain capability of up to 110%), high sensitivity (with a gauge factor of 847.87 (92% < ε < 110%)), and satisfactory sensing durability (with response cycles of 10000 under 25% strain) and can detect ultrasmall strains (0.2% strain). In addition, the sensor exhibits similar real-time dynamic responses at different strain levels (0%−40%) and states (untwisted, twisted by 90°, and twisted by 180°), indicating its characteristic of torsional low interference. Moreover, the self-adhesive silica gel allows the sensor to directly adhere to the skin surface, reducing motion artifacts and improving the accuracy of monitoring complex strain states during underwater activities. Therefore, the flexible strain sensor holds potential as a nextgeneration flexible strain sensor for underwater use.

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“…Zhou et al [48] explored DEP choking phenomenon for deformable particles in a converging-diverging microchannel. Zhou et al [49] established a mathematical model to study the transport of nanoparticle in polyelectrolyte brush layer-modified nanopores, highlighting the importance of ICP in this connection. In all these reported studies, one central focus was to explore inventive means for controlling the ICP phenomena, which was more commonly achieved by altering the channel geometries preferentially with characteristic sharp gradients in the dimensions of the channel section.…”

Section: Introductionmentioning

confidence: 99%

Modulating selective ionic enrichment and depletion zones in straight nanochannels via the interplay of surface charge modulation and electric field mediated fluid‐thickening

Bhattacharya,

Chakraborty

2023

Electrophoresis

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We report the possibilities of achieving highly controlled segregation of ion‐enriched and ion‐depleted regions in straight nanochannels. This is achieved via harnessing the interplay of an axial gradient of the induced transverse electric field on account of electrical double layer phenomenon and the localized thickening of the fluid because of intensified electric fields due to the large spatial gradients of the electrical potential in extreme confinements. By considering alternate surface patches of different charge densities over pre‐designed axial spans, we illustrate how these effects can be exploited to realize selectively ion‐enriched and ion‐depleted zones. Physically, this is attributed to setting up of an axial concentration gradient that delves on the ionic advection due to the combined effect of an externally applied electric field and induced back‐pressure gradient along the channel axis and electro‐migration due to the combinatorial influences of the applied and the induced electrostatic fields. With an explicit handle on the pertinent parameters, our results offer insights on the possible means of imposing delicate controls on the solute‐enrichment and depletion phenomena, a paradigm that remained unexplored thus far.

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Electrokinetic transport of nanoparticles in functional group modified nanopores

Cited by 8 publications

References 54 publications

Electrokinetic transport phenomena in nanofluidics and their applications

Electrokinetic transport phenomena in nanofluidics and their applications

Flexible Strain Sensor Based on Copper/Graphene Composite Films

Modulating selective ionic enrichment and depletion zones in straight nanochannels via the interplay of surface charge modulation and electric field mediated fluid‐thickening

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