Light-driven motion of water droplets with directional control on nanostructured surfaces

An, Shun; Ming-Yuan, Zhu; Gu, Kan Feng; Jiang, Modi; Shen, Qingchen; Fu, Benwei; Song, Chengyi; Peng, Tao; Deng, Tao; Shang, Wen

doi:10.1039/c9nr09575f

Cited by 30 publications

(11 citation statements)

References 44 publications

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“…Droplet manipulation in light field can be achieved through photoresponsive materials 99,100,120 and the photothermal effect. 101,121 An et al 99 achieved droplet transport along a predetermined orbit on a surface that could deformed under the light stimulation at an average speed of over 1 cm/s (Figure 11a). The substrate with nanostructures underwent thermal expansion under the action of light, which caused the base to tilt.…”

Section: Strategies Of Droplet Manipulation In a Light Fieldmentioning

confidence: 99%

Bioinspired materials for droplet manipulation: Principles, methods and applications

Xiu

Lian

et al. 2022

Droplet

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Droplet manipulation techniques such as transport and merging have been widely used in many fields including biology, chemistry, material and energy applications. Moreover, droplet manipulation strategies have been extensively investigated and reviewed in terms of droplet placement on solid surfaces. However, less attention has been paid to the practice of droplet manipulation technology in other environments, limiting our understanding and the broadening of technology application. In this article, we provided an overview of the recent progress in controlling droplets in various situations, including droplet manipulation on a surface mediated by the passive strategy (Laplace pressure and wettability gradients) and active strategy (electric field, magnetic field, light and heat). We also presented the principle of droplet manipulation and detailed the application of bionic surfaces in droplet manipulation, and the applications and prospects of droplet manipulation technology were summarized.

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Section: Strategies Of Droplet Manipulation In a Light Fieldmentioning

confidence: 99%

Bioinspired materials for droplet manipulation: Principles, methods and applications

Xiu

Lian

et al. 2022

Droplet

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“…For instance, shorebirds use surface tension to induce transport of millimetric droplets in their beaks; 1,2 in microuidics, [3][4][5] printing, 6,7 and oil-water separation, 8 the microchannel is conducive to achieve directional transport of droplets. Thus far, there have been many techniques to propel droplet motion using an external oscillatory electric eld, 9,10 chemical reaction, 11 vibrating substrates, 12,13 thermal gradients, 14,15 light, 16 and magnetic elds. 17 Lv et al 18 reported a strategy to drive droplets by light-induced asymmetric deformation of the channel wall.…”

Section: Introductionmentioning

confidence: 99%

Unidirectional self-actuation transport of a liquid metal nanodroplet in a two-plate confinement microchannel

Song

et al. 2022

Nanoscale Adv.

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“…Centrifugal drive [11] is one of many droplet driving methods. Compared with other driving methods, it does not need to rely on external high-precision equipment like surface tension drive [12][13][14]; only a simple motor can drive it. It is also not as sensitive to the physical/chemical properties of liquids as magnetic drive [15], which can be used to drive biological fluids such as blood, urine, and organic solvents.…”

Section: Introductionmentioning

confidence: 99%

Research on the Centrifugal Driving of a Water-in-Oil Droplet in a Microfluidic Chip with Spiral Microchannel

Xie

Cai

et al. 2022

Applied Sciences

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Combining the advantages of droplet-based microfluidics and centrifugal driving, a method for centrifugally driving W/O droplets with spiral microchannel is proposed in this paper. A physical model of droplet flow was established to study the flow characteristics of the W/O droplet in the spiral microchannel driven by centrifugal force, and kinematic analysis was performed based on the rigid body assumption. Then, the theoretical formula of droplet flow rate was obtained. The theoretical value was compared with the actual value measured in the experiments. The result shows that the trend of the theoretical value is consistent with the measured value, and the theoretical value is slightly larger than the experimentally measured value caused by deformation. Moreover, it is found that the mode of centrifugal driving with spiral microchannel has better flow stability than the traditional centrifugal driving structure. A larger regulation speed range can be achieved by adjusting the motor speed without using expensive equipment or precise instruments. This study can provide a basis and theoretical reference for the development of droplet-based centrifugal microfluidic chips.

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Light-driven motion of water droplets with directional control on nanostructured surfaces

Abstract: Discrete droplet transport has drawn much interest in a broad range of applications.

Cited by 30 publications

References 44 publications

Bioinspired materials for droplet manipulation: Principles, methods and applications

Bioinspired materials for droplet manipulation: Principles, methods and applications

Unidirectional self-actuation transport of a liquid metal nanodroplet in a two-plate confinement microchannel

Research on the Centrifugal Driving of a Water-in-Oil Droplet in a Microfluidic Chip with Spiral Microchannel

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