Mitigating Joule heating in smart nanochannels: Evaluating the efficacy of AC vs. DC fields

International Communications in Heat and Mass Transfer, Год журнала: 2024, Номер 154, С. 107448 - 107448

Опубликована: Апрель 1, 2024

Язык: Английский

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The role of ionic concentration polarization on the behavior of nanofluidic membranes

Chemical Engineering and Processing - Process Intensification, Год журнала: 2024, Номер 202, С. 109849 - 109849

Опубликована: Июнь 7, 2024

Язык: Английский

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Research progress on remediation of heavy metal contaminated soil by electrokinetic-permeable reactive barrier

Chemical Engineering Journal, Год журнала: 2024, Номер 490, С. 151548 - 151548

Опубликована: Апрель 22, 2024

Язык: Английский

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Synergistic effects of dielectrophoretic and magnetophoretic forces on continuous cell separation via pinched flow fractionation

Physics of Fluids, Год журнала: 2025, Номер 37(2)

Опубликована: Фев. 1, 2025

The challenges of constraints and imprecision in chemical analysis medical diagnosis are particularly evident the separation blood cells. Pinched flow fractionation, a passive microfluidic technique, has gained attention for its potential size-based cell separation. Enhancing efficiency is crucial, especially through integration with external forces or active methods. This study explores use dielectrophoresis (DEP) magnetophoresis (MP) to separate platelet cells, red white circulating tumor These were analyzed both independently simultaneously. To achieve optimal separation, Navier–Stokes equations, Newton's second law, system's electric magnetic fields modeled. Experiments conducted branched microchannel assess impact various parameters, including buffer rate, pinched section width, applied voltage, field frequency, intensity. revealed approximately 99% under conditions Wp=20 μm, Q2=1250 μl/h, f=100 kHz, V=3 V, M=1.5 T. findings demonstrate that while DEP MP individually enhance their simultaneous application significantly improves precision, achieving complete optimized system holds great promise applications analytical chemistry diagnostics, analysis.

Язык: Английский

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Surface charge-dependent slip length modulates electroosmotic mixing in a wavy micromixer

Physics of Fluids, Год журнала: 2024, Номер 36(7)

Опубликована: Июль 1, 2024

This study explores electroosmotic mixing in microfluidic channel with predefined surface topology, mainly focusing the effect of charge-dependent slip length on underlying dynamics. Our analysis addresses need for precise control flow and participating fluids at microscale, crucial medical biomedical applications. In present work, we consider a wavy microchannel non-uniform charge to explore behavior. To this end, adopting finite-element approach, numerically solve Laplace, Poisson–Boltzmann, convection–diffusion, Navier–Stokes equations steady-state. The model is validated by comparing results available theoretical experimental data. Through numerical simulations, analyzes patterns microchannels, highlighting impact lengths efficiency. For example, diffusive Peclet number 200, efficiency drops from 95.5% 91.5% when considering length. It established that fluid rheology, characterized Carreau behavior index, non-trivially influences field modulation Increased numbers enhance velocity, affecting overall constituent chosen fluidic pathway. instance, increasing 0.01 1.0, discernible trend emerges higher line density accelerated velocity within microchannel. also examines efficiency, particularly convective regime transport. These insights offer practical guidance designing systems intended enhanced capabilities. Additionally, likelihood particle aggregation under shear forces, vital biological non-Newtonian fluids, implications drug delivery, diagnostics, technologies.

Язык: Английский

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Ionic Transport Behavior of Soft Nanochannels for Newtonian and Non-Newtonian Electrolytes

Industrial & Engineering Chemistry Research, Год журнала: 2024, Номер 63(24), С. 10812 - 10824

Опубликована: Июнь 4, 2024

With the rapid progress in micro/nanofluidics, understanding fundamental mechanisms of ionic transport, fluid behavior, and microsystem dynamics is more crucial than ever. Given substantial expenses associated with manufacturing such systems, computational simulations offer a cost-effective avenue for advancing this industry sector while minimizing financial burdens. In context, current study explores impact electrolyte characteristics by numerically analyzing electroosmotic flow (EOF) conical nanochannel featuring charged slippery surfaces coated polyelectrolyte layer. Two types electrolytic fluids, namely, water (representing Newtonian fluid) blood plasma non-Newtonian fluid), were investigated. The behavior electrolytes was modeled using Bingham–Papanastasiou model. governing equations nonlinear model, Poisson–Nernst–Planck Navier–Stokes equations, solved finite element method. Various parameters including slip length, surface charge density, soft layer concentration systematically adjusted to assess three key aspects: EOF, selectivity, rectification. findings revealed that increasing length significantly enhanced EOF both electrolytes. For instance, platelets within core increased 1.5 times extension from 0 10 nm. Additionally, applying positive voltage amplified particularly when wall charges similar. example, decreasing density −0.02 C/m2 led 1.5-fold increase platelet rising 0.028 0.042 m/s.

Язык: Английский

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Blue Energy Conversion Utilizing Smart Ionic Nanotransistors

Electrochimica Acta, Год журнала: 2024, Номер unknown, С. 145186 - 145186

Опубликована: Окт. 1, 2024

Язык: Английский

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Impact of surface charge density modulation on ion transport in heterogeneous nanochannels

Scientific Reports, Год журнала: 2024, Номер 14(1)

Опубликована: Авг. 8, 2024

Abstract The PNP nanotransistor, consisting of emitter, base, and collector regions, exhibits distinct behavior based on surface charge densities various electrolyte concentrations. In this study, we investigated the impact density ion transport within nanotransistors at different concentrations applied voltages. We employed a finite-element method to obtain steady-state solutions for Poisson–Nernst-Planck Navier–Stokes equations. ions form depletion region, influencing ionic current, analyze influence depth region. Our findings demonstrate that an increase in results deeper zone, leading reduction current. However, very low concentrations, optimal causes current reach its lowest value, subsequently increasing with further increments density. As such, $${V}_{app}=+1 \text{V}$$ V app = + 1 V $${C}_{0}=1 \text{mM}$$ C 0 mM , increases by 25% when rises from 5 20 $$\text{mC}.{\text{m}}^{-2}$$ mC . m - 2 whereas $${C}_{0}=10 10 decreases 65% same This study provides valuable insights into their potential applications nanoelectronic devices.

Язык: Английский

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Optimizing the Microchannel Geometry for Effective Control of Analyte Band Dispersion

Chemical Engineering and Processing - Process Intensification, Год журнала: 2025, Номер unknown, С. 110221 - 110221

Опубликована: Фев. 1, 2025

Язык: Английский

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A Comprehensive Review of Pinch Flow Fractionation in Microfluidics: From Principles to Practical Applications

Chemical Engineering and Processing - Process Intensification, Год журнала: 2024, Номер unknown, С. 110087 - 110087

Опубликована: Ноя. 1, 2024

Язык: Английский

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