Droplet manipulation on superhydrophobic surfaces based on external stimulation: A review

Yang, Chen; Zeng, Qinghong; Huang, Jinxia; Guo, Zhiguang

doi:10.1016/j.cis.2022.102724

Cited by 82 publications

(23 citation statements)

References 159 publications

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“…Therefore, it has elicited ever-increasing interest in its potential application in the COVID-19 pandemic and cancer investigation, diagnosis, environment monitoring, combinatorial chemistry, ondemand chemical feed, etc. [1][2][3][4][5][6][7][8][9][10][11][12] Nowadays, inspired by the "dorsum of the Namib desert beetle," creating droplet arrays with a specific geometry and volume on heterogeneous patterned surfaces has been developed as an efficient method to facilitate high-throughput and programmable on-surface droplets processing. [13][14][15][16][17] The droplet repellency from the superhydrophobic (SHB) or superamphiphobic (SAB) backgrounds and the droplet anchoring property from the hydrophilic or amphiphilic regions can be integrated into a surface.…”

Section: Introductionmentioning

confidence: 99%

Mosaic Patterned Surfaces toward Generating Hardly‐Volatile Capsular Droplet Arrays for High‐Precision Droplet‐Based Storage and Detection

Jiao

et al. 2023

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Precise detection involving droplets based on functional surfaces is promising for the parallelization and miniaturization of platforms and is significant in epidemic investigation, analyte recognition, environmental simulation, combinatorial chemistry, etc. However, a challenging and considerable task is obtaining mutually independent droplet arrays without cross‐contamination and simultaneously avoiding droplet evaporation‐caused quick reagent loss, inaccuracy, and failure. Herein, a strategy to generate mutually independent and hardly‐volatile capsular droplet arrays using innovative mosaic patterned surfaces is developed. The evaporation suppression of the capsular droplet arrays is 1712 times higher than the naked droplet. The high evaporation suppression of the capsular droplet arrays on the surfaces is attributed to synergistic blocking of the upper oil and bottom mosaic gasproof layer. The scale‐up of the capsular droplet arrays, the flexibility in shape, size, component (including aqueous, colloidal, acid, and alkali solutions), liquid volume, and the high‐precision hazardous substance testing proves the concept's high compatibility and practicability. The mutually independent capsular droplet arrays with amazingly high evaporation suppression are essential for the new generation of high‐performance open‐surface microfluidic chips used in COVID‐19 diagnosis and investigation, primary screening, in vitro enzyme reactions, environmental monitoring, nanomaterial synthesis, etc.

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Section: Introductionmentioning

confidence: 99%

Mosaic Patterned Surfaces toward Generating Hardly‐Volatile Capsular Droplet Arrays for High‐Precision Droplet‐Based Storage and Detection

Jiao

et al. 2023

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“…As early as 1997, Barthlott and Neinhuis from the University of Bern in Germany uncovered the surface structure of the lotus leaf through scanning electron microscopy and found that the micron papillae structure of the lotus leaf surface and the low surface energy of the waxy material caused the 'lotus leaf effect', which led to extensive researches on superhydrophobic surfaces. [1][2][3][4] The surface with the contact angle (CA) greater than 150°is generally defined as a superhydrophobic(SH) surface. Superhydrophobic materials have the advantages of water resistance, corrosion protection, [5][6][7][8] ice protection, [9,10] self-cleaning, [11,12] and oilwater separation.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances on the Abrasion Resistance Enhancements and Applications of Superhydrophobic Materials

Yang

Yuan

Liu

et al. 2023

The Chemical Record

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Researches on superhydrophobicity have been overwhelming and have shown great advantages in various fields. However, the abrasion resistance of superhydrophobic structures was usually poor, and they were easily damaged by external force or harsh environment, which greatly limited the applications of superhydrophobic surfaces. Much attention has been paid to improving the abrasion resistance of superhydrophobic materials by researchers. In this review, aimed at the advances on improving the abrasion resistance of superhydrophobic surfaces, it was summarized and compared three enhancement strategies including the reasonably design of micro‐nano structures, the adoption of adhesives, and the preparation of self‐healing surface. Finally, the applications of typical superhydrophobic materials with abrasion resistance were reviewed in various fields. In order to broaden the application fields of superhydrophobic materials, the abarasion resistance should be further improved. Therefore, we proposed the ideas for the future development of superhydrophobic materials with higher abrasion resistance. We hope that this review will provide a new approach to the preparation and development of stable superhydrophobic surfaces with higher abrasion resistance.

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“…19 Although reversible CB-to-W surfaces under external stimuli have been developed for droplet manipulation, [21][22][23] the stability of the surface wettability over time is far from sufficient for many applications, such as chemical or biochemical droplet reactions. 24,25 For multi-stage reaction/analysis, non-loss transportation of the droplet is often required in between the stages as well.…”

Section: Introductionmentioning

confidence: 99%

Stretchable superhydrophobic elastomers with on-demand tunable wettability for droplet manipulation and multi-stage reaction

Ding

Cheng

et al. 2023

J. Mater. Chem. C

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Droplet manipulation on superhydrophobic surfaces based on external stimulation: A review

Cited by 82 publications

References 159 publications

Mosaic Patterned Surfaces toward Generating Hardly‐Volatile Capsular Droplet Arrays for High‐Precision Droplet‐Based Storage and Detection

Mosaic Patterned Surfaces toward Generating Hardly‐Volatile Capsular Droplet Arrays for High‐Precision Droplet‐Based Storage and Detection

Recent Advances on the Abrasion Resistance Enhancements and Applications of Superhydrophobic Materials

Stretchable superhydrophobic elastomers with on-demand tunable wettability for droplet manipulation and multi-stage reaction

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