Tunable Superparamagnetic Ring (tSPRing) for Droplet Manipulation (Adv. Funct. Mater. 32/2021)

Nasirimarekani, Vahid; Benito‐Lopez, Fernando; Basabe‐Desmonts, Lourdes

doi:10.1002/adfm.202170237

Cited by 5 publications

(5 citation statements)

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“…[ 33–36 ] Nevertheless, previous research has mainly focused on the simple splitting and horizontal self‐assembled structures of the ferrofluid droplets induced by magnetic‐field‐gradient forces, which typically exhibit a single spike‐array mode. [ 37,38,41,45 ] The controlled splitting behavior of ferrofluid droplets under magnetic torque is also overlooked. Moreover, the horizontal and vertical dynamic self‐assembly behavior of ferrofluid droplets still needs to be explored.…”

Section: Introductionmentioning

confidence: 99%

Horizontal and Vertical Coalescent Microrobotic Collectives Using Ferrofluid Droplets

et al. 2023

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Many artificial miniature robotic collectives have been developed to overcome the inherent limitations of inadequate individual capabilities. However, the basic building blocks of the reported collectives are mainly in the solid state, where the morphological boundaries of internal individuals are clear and cannot genuinely merge. Miniature robotic collectives based on liquid units still need to be explored; such on‐demand mergeable swarm systems are advantageous for adapting to the changing external environment. Here, a strategy to achieve a coalescent collective system we presented that exploits the ferrofluid droplets' splitting and coalescence properties to trigger the formation of horizontal multimodal and vertical gravity‐resistant collectives and unveil pattern‐enabled robotic functionalities. When subjected to a time‐varying magnetic field, the droplet swarm exhibits a variety of morphologies ranging from horizontal collectives, including vortex‐like, chain‐like, and crystal‐like patterns to vertical layer‐upon‐layer patterns. Using experiments and simulations, the formation and transformation of different morphological collectives are shown and their robust environmental adaptability are demonstrated. Potential applications of the multimodal droplet collectives are presented, including exploring an unknown environment, targeted object delivery, and fluid flow filtration in a lab‐on‐a‐chip. This work may facilitate the design of microrobotic swarm systems and expand the range of materials for miniature robots.

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Section: Introductionmentioning

confidence: 99%

Horizontal and Vertical Coalescent Microrobotic Collectives Using Ferrofluid Droplets

et al. 2023

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“…By moving the magnet, the droplet or bubble can be transported by the ferrofluid meniscus formed between the droplet (or bubble) and the ferrofluid‐infused surface. [ 9a,10 ] Furthermore, solid particles can also be transported by a soft magnetic carpet with soft responsive pillars. [ 3b,c,11 ]…”

Section: Introductionmentioning

confidence: 99%

Bioinspired Lubricated Slippery Magnetic Responsive Microplate Array for High Performance Multi‐Substance Transport

Shao

Jiang

et al. 2022

Adv Funct Materials

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In nature, many organisms have the ability to transport substances, such as bubbles, droplets, or solids, on demand to meet their survival needs. Inspired by these distinct behaviors, a variety of substance transport strategies have been developed for promising applications in microfluidics, microelectronics, and biomedicine. However, it is still challenging to achieve versatile multi‐substance (gas, liquid, and solid) transport. In this work, a triple‐biologically inspired lubricated slippery magnetic‐responsive microplate array (LS‐MMA) by integrating the characteristics of fish scales, Nepenthes peristome, and respiratory cilia is proposed for multi‐substance transport. Under the actuation of the moving magnetic field, the microplates bend and overlap sequentially to form a continuous slippery surface with large curvature. With the continuous motion of the slippery surface, active multi‐substance transport can be realized. The transport speed of the bubbles, droplets, and solid glass balls can reach ≈5, ≈14, and ≈80 mm s−1, respectively. By virtue of the lubricant's capillary sticking property to the substance, the LS‐MMA also realizes 3D on‐demand transport of bubbles and droplets. The LS‐MMA‐based multi‐substance transport strategy improves the applicability and flexibility of target manipulation and has a broad potential application in the fields of microchemical reactions and biomedical engineering.

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“…[ 52–54 ] Lastly, as aforementioned, droplets on LIS can be cloaked by the lubricating liquid, forming a unique wrapping layer. By replacing lubricant with functional materials, for example, ferrofluid, [ 55–57 ] the wrapping layer can be utilized for more active and precise manipulation of droplets (Figure 2C). Although it is the ultimate goal to simply and efficiently achieve a variety of controls that fulfill diverse requirements in practical applications, there are always obstacles with various control modes and the stability and sustainability of LIS itself.…”

Section: Principles Of Droplet Manipulation On Bioinspired Slippery S...mentioning

confidence: 99%

“…[ 100–103 ] Recently, ferrofluid acting as magnetic robots showed great potential for droplet manipulation. [ 55,57,104,105 ] By adopting ferrofluid as an infusing lubricant, the control system synergizes with the controllability of the magnetic field while retaining good antifouling properties and low surface energy. Recently, Yao et al.…”

Section: Smart Droplet Manipulation On Bioinspired Slippery Surfacesmentioning

confidence: 99%

Droplet Manipulation on Bioinspired Slippery Surfaces: From Design Principle to Biomedical Applications

Wang

Zehao

et al. 2023

Small Methods

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Droplet manipulation with high efficiency, high flexibility, and programmability, is essential for various applications in biomedical sciences and engineering. Bioinspired liquid‐infused slippery surfaces (LIS), with exceptional interfacial properties, have led to expanding research for droplet manipulation. In this review, an overview of actuation principles is presented to illustrate how materials or systems can be designed for droplet manipulation on LIS. Recent progress on new manipulation methods on LIS is also summarized and their prospective applications in anti‐biofouling and pathogen control, biosensing, and the development of digital microfluidics are presented. Finally, an outlook is made on the key challenges and opportunities for droplet manipulation on LIS.

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Tunable Superparamagnetic Ring (tSPRing) for Droplet Manipulation (Adv. Funct. Mater. 32/2021)

Cited by 5 publications

References 0 publications

Horizontal and Vertical Coalescent Microrobotic Collectives Using Ferrofluid Droplets

Horizontal and Vertical Coalescent Microrobotic Collectives Using Ferrofluid Droplets

Bioinspired Lubricated Slippery Magnetic Responsive Microplate Array for High Performance Multi‐Substance Transport

Droplet Manipulation on Bioinspired Slippery Surfaces: From Design Principle to Biomedical Applications

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