Liquid marbles from soot films

Li, Xiaoguang; Shi, Haixiao; Wang, Yiqi; Wang, Hanming; Junchao, Huang; Duan, Mei

doi:10.1039/c9sm02199j

Cited by 16 publications

(14 citation statements)

References 57 publications

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“…This is in contrast to the results from other work, where a smaller particle size leads to weaker LMs. 75,76 The results drawn from the experiments by varying the particle size from 22 to 141 μm in this demonstration may not be universal. Nevertheless, we assume that different preparation methodology may affect the robustness of LMs.…”

Section: Methodologies and Formation Under Electrostaticsmentioning

confidence: 83%

Liquid Marbles under Electric Fields: New Capabilities for Non-wetting Droplet Manipulation and Beyond

et al. 2022

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The study of liquid marbles (LMs) composed of stabilizing liquid droplets with solid particles in a gaseous environment has matured into an established area in surface and colloid science. The minimized "solid−liquid−air" triphase interface enables LMs to drastically reduce adhesion to a solid substrate, making them unique non-wetting droplets transportable with limited energy. The small volume, enclosed environment, and simple preparation render them suitable microreactors in industrial applications and processes such as cell culture, material synthesis, and blood coagulation. Extensive application contexts request precise and highly efficient manipulations of these non-wetting droplets. Many external fields, including magnetic, acoustic, photothermal, and pH, have emerged to prepare, deform, actuate, coalesce, mix, and disrupt these non-wetting droplets. Electric fields are rising among these external stimuli as an efficient source for manipulating the LMs with high controllability and a significant ability to contribute further to proposed applications. This Feature Article attempts to outline the recent developments related to LMs with the aid of electric fields. The effects of electric fields on the preparation and manipulation of LMs with intricate interfacial processes are discussed in detail. We highlight a wealth of novel electric field-involved LM-based applications and beyond while also envisaging the challenges, opportunities, and new directions for future development in this emerging research area.

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Section: Methodologies and Formation Under Electrostaticsmentioning

confidence: 83%

Liquid Marbles under Electric Fields: New Capabilities for Non-wetting Droplet Manipulation and Beyond

et al. 2022

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“…Very recently, such performance has been also found in superhydrophobic soot films used for liquid marble production. [ 36 ] To address this issue, concave glasses have been employed as substrates, such that both small and large droplets can be arbitrarily rolled on a shaking substrate. [ 25,36 ] Here, concave platforms were employed for rolling liquids with different surface tensions and volumes.…”

Section: Resultsmentioning

confidence: 99%

Monolayer Nanoparticle‐Covered Liquid Marble Production with Low Surface Tension Liquids

Shi

2020

Adv Materials Inter

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As an emerging droplet system, monolayer nanoparticle‐covered (mNPc) liquid marbles have shown fascinating properties and application values. Their formation process has been clear, but liquid availability for production has yet to be clarified. This study addresses this issue from the angle of surface tension, revealing critical surface tension and contact angle values for mNPc liquid marble production with both rolling and compression methods. Water‐ethanol and water‐surfactant systems are employed as testing liquids. With irreversible pinning as criterion, critical surface tension values that allow mNPc liquid marble formation are obtained with the two kinds of liquids, forming ranges from 38.6 to 31.8 mN m−1, and from 36.7 to 27.6 mN m−1, for the rolling and compression methods, respectively. Correspondingly, contact angles in the ranges from 132° to 126° and from 116–124° are regarded as the lower limits for mNPc liquid marble production with the rolling and compression methods, respectively. In addition, rupture and deformation behaviors under low surface tension are systematically investigated and a depinning approach that facilitates marble formation is proposed. This study could provide important guidance for various applications that require low surface tension liquids to produce mNPc liquid marbles.

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“…Currently, the general consensus is that LMs coated with multiple layers of particles have a slower rate of evaporation than their uncoated counterpart (drying rate is halved for a coating thickness 1/10th the drop size), whereas LMs with a particle monolayer have faster rates than their equivalent naked droplet. [17,18,21,22,24,109,123,125,138,139] For monolayer LMs this has been attributed to the incompressibility of the interface, which remains constant over the course of drying. An LM covered with a monolayer of particles will exhibit more interface and therefore quicker drying (Figure 4).…”

Section: Mono/multilayermentioning

confidence: 99%

Long‐Lived Liquid Marbles for Green Applications

Saczek

Yao

Živković

et al. 2021

Adv Funct Materials

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Liquid marbles allow for quantities of various liquids to be encapsulated by hydrophobic particles, thus ensuring isolation from the external environment. The unique properties provided by this soft solid has allowed for use in a wide array of different applications. Liquid marbles do however have certain drawbacks, with lifetime and robustness often being limited. Within this review, particle characteristics that impact liquid marble stability are critically discussed, in addition to other factors, such as internal and external environments, that can be engineered to achieve a robust long-lived liquid marble. New emerging applications, which will benefit from this improvement, are explored such as unconventional computing, cell mimicry, and soft lithography. Incorporation of liquid marbles and liquid crystal technologies shows promise in utilizing structural color for optical display applications, and within green and environmental applications, liquid marble technology is increasingly adapted for use in energy conversion, heavy metal recovery, CO 2 capture, and oil removal.

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Liquid marbles from soot films

Abstract: Mechanically-weak superhydrophobic soot films are suitable for liquid marble production.

Cited by 16 publications

References 57 publications

Liquid Marbles under Electric Fields: New Capabilities for Non-wetting Droplet Manipulation and Beyond

Liquid Marbles under Electric Fields: New Capabilities for Non-wetting Droplet Manipulation and Beyond

Monolayer Nanoparticle‐Covered Liquid Marble Production with Low Surface Tension Liquids

Long‐Lived Liquid Marbles for Green Applications

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