Electrostatically excited liquid marble as a micromixer

Nguyen, Nhat‐Khuong; Singha, Pradip; An, Hongjie; Phan, Hoang‐Phuong; Nguyen, Nam‐Trung; Ooi, Chin Hong

doi:10.1039/d1re00121c

Cited by 16 publications

(26 citation statements)

References 64 publications

(75 reference statements)

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“…External excitation that induces internal flow leading to mixing enhancement is highly desirable. 44 Applying motion to a droplet or liquid marble has long been utilised as one of the simplest methods to improve mixing since the motion generates a steady internal recirculating flow. [52][53][54][55] Song et al rolled a droplet to create chaotic advection that led to sub-millisecond mixing.…”

Section: Mixing In a Liquid Marblementioning

confidence: 99%

“…Previous studies showed that periodic deformation substantially improves mixing performances for liquid droplets and liquid marbles. 44 Larger liquid marbles are also inherently easier to deform since the effect of surface tension diminishes with increasing volume. 44…”

Section: Deformation Of a Liquid Marblementioning

confidence: 99%

“…44 Larger liquid marbles are also inherently easier to deform since the effect of surface tension diminishes with increasing volume. 44…”

Section: Deformation Of a Liquid Marblementioning

confidence: 99%

“…Nguyen et al proposed an automated and on-demand mixing strategy using an external AC electric field to periodically deform and vibrate the liquid marble, providing a tenfold increase in the mixing performance. 44 As such, the liquid marble-based platform has demonstrated its enormous potential for microreactor and micromixer applications.…”

Section: Introductionmentioning

confidence: 99%

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Controllable high-performance liquid marble micromixer

et al. 2022

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Section: Mixing In a Liquid Marblementioning

confidence: 99%

Section: Deformation Of a Liquid Marblementioning

confidence: 99%

“…44 Larger liquid marbles are also inherently easier to deform since the effect of surface tension diminishes with increasing volume. 44…”

Section: Deformation Of a Liquid Marblementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Controllable high-performance liquid marble micromixer

et al. 2022

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“…Besides measuring conventional liquid droplets, these tools have been used to analyse liquid marbles, which are liquid droplets coated with micro-or nanoparticles [21][22][23][24][25][26][27]. Thanks to their unique features such as high elasticity, self-propulsion, and ability to coalesce, liquid marbles are present in applications such as micro-or nanoscale chemical reaction control, microfluidics, or cosmetics [28][29][30][31][32][33][34][35][36][37][38][39][40][41]. When liquid marbles rest on a flat and smooth surface, they are analogous to a sessile droplet on a non-wetting solid surface [42].…”

Section: Introductionmentioning

confidence: 99%

Modelling Sessile Droplet Profile Using Asymmetrical Ellipses

Tran¹,

Nguyen

Singha

et al. 2021

Processes

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Modelling the profile of a liquid droplet has been a mainstream technique for researchers to study the physical properties of a liquid. This study proposes a facile modelling approach using an elliptic model to generate the profile of sessile droplets, with MATLAB as the simulation environment. The concept of the elliptic method is simple and easy to use. Only three specific points on the droplet are needed to generate the complete theoretical droplet profile along with its critical parameters such as volume, surface area, height, and contact radius. In addition, we introduced fitting coefficients to accurately determine the contact angle and surface tension of a droplet. Droplet volumes ranging from 1 to 300 µL were chosen for this investigation, with contact angles ranging from 90° to 180°. Our proposed method was also applied to images of actual water droplets with good results. This study demonstrates that the elliptic method is in excellent agreement with the Young–Laplace equation and can be used for rapid and accurate approximation of liquid droplet profiles to determine the surface tension and contact angle.

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Calcium Alginate Core–Shell Liquid Beads Encapsulated with Microalgae for Wastewater Treatment

Tran,

Nguyen,

Yadav

et al. 2024

Adv Energy and Sustain Res

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Liquid beads are core–shell particles with a liquid core and a solid shell. Calcium alginate liquid beads have been emerging as a promising platform for cell encapsulation. These beads have demonstrated their capability of encapsulating and culturing a wide range of human cells for tissue engineering. However, a significant research gap remains in the application of alginate liquid beads for encapsulating photosynthetic microorganisms. Herein, fast‐growing microalgae strain Chlorella vulgaris is encapsulated into calcium alginate liquid beads to facilitate the removal of nutrients from wastewater, minimizing the risk of eutrophication. Liquid bead‐microalgae systems are prepared, using different calcium ion concentrations as crosslinking ions. It has been thoroughly characterized for their morphologies, cell growth patterns, nutrient removal capabilities, and overall stability throughout the wastewater treatment process, with upflow anaerobic sludge blanket effluent as the wastewater model. The results indicate that the liquid bead‐microalgae system with the highest calcium ion concentration (5%) performs more efficiently, exhibiting a well‐formed crosslinking structure, leading to rapid cell growth with the highest cell density and the most effective removal of nutrients. The findings from this study provide valuable insights for future optimization and upscaling efforts in wastewater treatment systems based on calcium alginate liquid beads.

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Electrostatically excited liquid marble as a micromixer

Abstract: Liquid marble is a promising microfluidic platform for microreactor applications. However, the lack of contactless and on-demand mixing strategies significantly hinders its potential. This paper reports the use of electrostatic...

Cited by 16 publications

References 64 publications

Controllable high-performance liquid marble micromixer

Controllable high-performance liquid marble micromixer

Modelling Sessile Droplet Profile Using Asymmetrical Ellipses

Calcium Alginate Core–Shell Liquid Beads Encapsulated with Microalgae for Wastewater Treatment

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