Near-infrared-responsive Liquid Marbles Stabilized with Carbon Nanotubes

Nakai, Keita; Nakagawa, Hinari; Kuroda, Keita; Fujii, Syuji; Nakamura, Yoshinobu; Yusa, Shin‐ichi

doi:10.1246/cl.130240

Cited by 45 publications

(32 citation statements)

References 24 publications

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“…[1] It does not wet any substrate because of the isolation effect of the surface particles and has been studied as a miniature container, revealing characteristics valuable in many fields, [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] such as electrochemical analysis, [5] material synthesis, [6] cell culture, [7][8][9][10] and various environmental testing, including pH, [11,12] temperature, [13] ultraviolet [14] /infrared light, [15] and chemical composition. [1] It does not wet any substrate because of the isolation effect of the surface particles and has been studied as a miniature container, revealing characteristics valuable in many fields, [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] such as electrochemical analysis, [5] material synthesis, [6] cell culture, [7]…”

Section: Doi: 101002/admi201701139mentioning

confidence: 99%

Liquid Shaping Based on Liquid Pancakes

Shi

Wang

et al. 2017

Adv Materials Inter

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Technically, this is achieved by increasing the particle density through changing the drop's surface area and, in the case of a liquid marble, the approach mainly includes droplet/marble impingement on a powder, [23,31] marble coalescence, [28,32] evaporation from the marble, [25][26][27] and artificial liquid extraction. [33] Given that marble shapes can be well controlled, such structured marbles could serve as smart containers allowing complex manipulations of the internal substances and, hence, a wider variety of results can be expected, compared with applying only spherical or puddle-shaped liquid marbles. However, nearly all the above works addressed liquid marble deformations mainly as phenomenon discussions, instead of being concerned with controllability or application feasibility. Obviously, although random shape is not hard to obtain, the nature of liquid destines the difficulty in transforming a spherical droplet into a designed shape despite particle coverage. For this, an addition strategy which joined units of simply deformed liquid marbles was proposed recently, demonstrating a fair designability of liquid shape, and the resulting shaped liquids were so coined the term "liquid plasticine." [34] However, the defects of this down-top shape design are significant. The main problem is that droplet movement during the joining process is difficult to control, such that the shape of the final liquid plasticine is not accurate in detail, particularly when constructing a large, complex structure.Here we show that the fine control of liquid shape could be realized using a top-down design with a subtraction strategy, in which a coated liquid pancake, with a large surface area, is segmented into a liquid plasticine with a precise structure. The process is well controlled and a clear advantage is achieved in the form of timesaving. A sol-gel superhydrophobic coating with weak binding force, and a container accommodating liquid of milliliter order, are key factors in this method. This work may provide opportunities for real and practical applications of structured/shaped liquids as smart containers.A Petri dish was coated on all surfaces by immersing it into an alkylated SiO 2 collosol, which was then withdrawn and air dried for 2 min. The resulting xerogel-coated Petri dish displayed a colorful appearance because of its nonuniform coating thickness that induced inhomogeneous light interference (Figure 1a). The coating was composed of about a dozen layers of hydrophobic SiO 2 nanoparticles (NPs) of ≈20 nm in diameter (Figure 1b), and a water drop on such a coating had a contact Liquid marbles with quasi-spherical shapes have great application potential as miniature containers. Recently, their shape modification is investigated, revealing great possibilities in broadening the uses for such containers. Current methods have demonstrated shape designability, but fine control of the final shape, important in applications, has remained a problem. Here, a facile method, based on a gravity-induced liquid pancake coated...

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Section: Doi: 101002/admi201701139mentioning

confidence: 99%

Liquid Shaping Based on Liquid Pancakes

Shi

Wang

et al. 2017

Adv Materials Inter

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“…Respirable liquid marbles for the cultivation of microorganisms and Daniel cells based on liquid marbles were reported recently by Shen et al [26][27]. Stimulus (pH, UV and IR) responsive liquid marbles were reported by Dupin, Fujii et al [28][29][30]. It is noteworthy that liquid marbles retain non-stick properties on a broad diversity of solid and liquid supports [31].…”

Section: Introductionmentioning

confidence: 99%

Interpretation of elasticity of liquid marbles

Whyman

Bormashenko

2015

Journal of Colloid and Interface Science

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“…Conventional liquid marbles are usually composed with a shell of hydrophobic functional materials, such as highly hydrophobic Fe 3 O 4 nanoparticles30, multifunctional Janus particles31 or carbon nanotubes32, which are responsive to the magnetic field, acidic/basic vapors, or NIR. The containers of conventional liquid marbles are usually water or reagents with no response to ambient conditions.…”

Section: Resultsmentioning

confidence: 99%

“…When the NIR irradiation began, the lignin-AuNPs composites inside the liquid marble adsorbed the irradiation through the loose PVDF shell and locally converted NIR energy into heat. The water inside the lignin-AuNPs composite droplet gradually evaporated and permeated through the gaps of the PVDF shell due to the heating32, resulting in a reduction in size and a liquid marble with a wrinkled surface. When most of the lignin-AuNP composites inside the liquid marble were gone, the structure became unstable and was on the verge of collapse.…”

Section: Resultsmentioning

confidence: 99%

Lignin-AuNPs liquid marble for remotely-controllable detection of Pb2+

Han

Wang

Hamel

et al. 2016

Sci Rep

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This work reported the green and facile fabrication of a versatile lignin-AuNP composite, which was readily and remotely encapsulated to form novel liquid marbles. The marbles can stay suspended in water, and show excellent photothermal conversion properties, as well as visual detection and adsorption towards Pb2+. More importantly, the marbles can simultaneously remotely detect and adsorb Pb2+ via co-precipitation by simply controlling the near infrared (NIR) irradiation. It is believed that the remotely-controllable NIR-responsive lignin-AuNPs liquid marble can be used in Pb2+-related reactions. The liquid marble can be placed in the system at the very beginning of the reaction and stably stays on the surface until the reaction has ended. After reacting, upon remote NIR irradiation, the liquid marble bursts to adsorb Pb2+, and the residual Pb2+ can be collected. This facile manipulation strategy does not use complicated nanostructures or sophisticated equipment, so it has potential applications for channel-free microfluidics, smart microreactors, microengines, and so on.

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Near-infrared-responsive Liquid Marbles Stabilized with Carbon Nanotubes

Cited by 45 publications

References 24 publications

Liquid Shaping Based on Liquid Pancakes

Liquid Shaping Based on Liquid Pancakes

Interpretation of elasticity of liquid marbles

Lignin-AuNPs liquid marble for remotely-controllable detection of Pb2+

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