Wetting and adhesion energy of droplets on wettability gradient surfaces

Xu, Cheng-xiao; Jia, Zhi-hai; Lian, Xu-hui

doi:10.1007/s10853-020-04607-5

Cited by 18 publications

(11 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Xu et al demonstrated gradient surfaces like those shown in Figure , patterns iv and v, with the holes and pillars having a square cross-sectional shape. While these appear to be the only gradient surfaces of their kind, spontaneous motion was not reported for either gradient . Nonetheless, the authors measured critical tilt angles and proposed a novel adhesion energy model for these surfaces.…”

Section: Passive Liquid-transport Mechanismsmentioning

confidence: 93%

Patterning Wettability for Open-Surface Fluidic Manipulation: Fundamentals and Applications

et al. 2022

View full text Add to dashboard Cite

Effective manipulation of liquids on open surfaces without external energy input is indispensable for the advancement of point-of-care diagnostic devices. Open-surface microfluidics has the potential to benefit health care, especially in the developing world. This review highlights the prospects for harnessing capillary forces on surface-microfluidic platforms, chiefly by inducing smooth gradients or sharp steps of wettability on substrates, to elicit passive liquid transport and higher-order fluidic manipulations without off-the-chip energy sources. A broad spectrum of the recent progress in the emerging field of passive surface microfluidics is highlighted, and its promise for developing facile, low-cost, easy-to-operate microfluidic devices is discussed in light of recent applications, not only in the domain of biomedical microfluidics but also in the general areas of energy and water conservation.

show abstract

Section: Passive Liquid-transport Mechanismsmentioning

confidence: 93%

Patterning Wettability for Open-Surface Fluidic Manipulation: Fundamentals and Applications

et al. 2022

View full text Add to dashboard Cite

show abstract

“…In 2020, Xu et al demonstrated micro-pillared and micro-hole gradient surfaces like those shown in Figure (patterns (K) and (L)) with the holes and pillars having a square cross-sectional shape. While these appear to be the only gradient surfaces of their kind like this, there does not appear to be a documented account of spontaneous motion on either gradient …”

Section: Introductionmentioning

confidence: 94%

“…While these appear to be the only gradient surfaces of their kind like this, there does not appear to be a documented account of spontaneous motion on either gradient. 91 Linear Topographic Microfabricated Linear Patterned Surfaces (Microlined Surfaces). Some examples of microlined linear gradient surfaces that have been demonstrated are shown in Figure 5 patterns (F), (M), (T), (U), and (V).…”

Section: ■ Introductionmentioning

confidence: 99%

“…Number of publications on passive wetting gradients vs year of publication. The papers listed here correspond to refs − , , − , , − .…”

Section: Introductionmentioning

confidence: 99%

“…Multiple colors within a single publication indicate the different substrates that were used. The papers listed here correspond to refs − , , − , , − . Some milestones in gradient development have been provided above the graph where the first time a certain gradient pattern was demonstrated is noted.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Survey of Micro/Nanofabricated Chemical, Topographical, and Compound Passive Wetting Gradient Surfaces

et al. 2021

View full text Add to dashboard Cite

Surface wetting gradients are desirable due to their ability to passively transport liquid droplets without the aid of gravity. Such surfaces can be prepared through topographical or chemical methods or a compound approach involving both methods. By altering the surface free energy across a surface, a droplet that contacts such a surface will experience an actuation force toward the hydrophilic region. Such transport properties make these surfaces attractive for a range of applications from thermal management to microfluidics to the investigation of biomolecular interactions. This paper reviews passive wetting gradients that have been demonstrated over the last three decades, focusing on the types of surfaces that have been developed to date along with the materials that have been used. The corresponding wetting ranges and physical lengths over which droplet mobility has been achieved on these various types of gradient surfaces are compared to guide future developments.

show abstract

Recent Developments in the Fabrication and Application of Superhydrophobic Suraces

Li,

Peng.,

You

et al. 2024

The Chemical Record

View full text Add to dashboard Cite

A superhydrophobic surface is defined as having a contact angle exceeding 150 °C, indicating a remarkable ability to repel water. Generally, superhydrophobicity originates from the utilization of low‐surface‐energy materials with unique micro‐ and nanostructures. Superhydrophobic surfaces have gained considerable recognition and are widely employed in diverse areas for anti‐icing, oil‐water separation, anticorrosion, self‐cleaning, blood‐repellent, and antibacterial applications. These surfaces can greatly enhance industrial processes by yielding significant performance improvements. In this review, we introduce the basic theories that provide a foundation for understanding the hydrophobic properties of superhydrophobic surfaces. We then discuss current techniques for fabricating superhydrophobic coatings, critically analyzing their strengths and limitations. Furthermore, we provide an overview of recent progress in the application of superhydrophobic materials. Finally, we summarize the challenges in developing superhydrophobic materials and future trends in this field. The insights provided by this review can help researchers understand the basic knowledge of superhydrophobic surfaces and obtain the latest progress and challenges in the application of superhydrophobic surfaces. It provides help for further research and practical application of superhydrophobic surfaces.

show abstract

Wetting and adhesion energy of droplets on wettability gradient surfaces

Cited by 18 publications

References 55 publications

Patterning Wettability for Open-Surface Fluidic Manipulation: Fundamentals and Applications

Patterning Wettability for Open-Surface Fluidic Manipulation: Fundamentals and Applications

Survey of Micro/Nanofabricated Chemical, Topographical, and Compound Passive Wetting Gradient Surfaces

Recent Developments in the Fabrication and Application of Superhydrophobic Suraces

Contact Info

Product

Resources

About