Droplet detachment force and its relation to Young–Dupre adhesion

Daniel, Dan; Koh, Xue Qi

doi:10.1039/d3sm01178j

Cited by 5 publications

(1 citation statement)

References 37 publications

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“…The adhesion force causes the droplet to form a liquid bridge between the gaps even if the distance is increased under the parallel plate structure, which causes the liquid sample to quickly stick on the top plate. According to the previous research formulas, the adhesion force of droplets in the vertical direction can be quantified based on the droplet radius

and

dimensions and integrated with the contact angle [ 10 , 11 ], as shown in Figure 3 b.…”

Section: Methodsmentioning

confidence: 99%

A Novel EWOD Platform for Freely Transporting Droplets in Double and Single-Plate Structures

Chang,

Huang,

Yao

2024

Micromachines

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This study developed a novel dielectric wetting microfluidic operation platform combining parallel-plate and coplanar-plate regions with a curved surface structure as the connection structure. With the new electrowetting on dielectric (EWOD) platform, “droplet pull-out” has been successfully achieved and viewed as an essential new operation for microfluidics with the dielectric wetting technique. The EWOD system is divided into a PDMS substrate top plate and an indium tin oxide (ITO) glass substrate as a bottom layer on this chip. In the parallel-plate region, the droplets can be generated and transported through the square parallel electrodes; in the single-plate area, the droplets can be pulled out from the parallel structure, transported and mixed through the common grounded coplanar electrodes. In dielectric wetting performance testing, coplanar electrodes can apply a maximum driving force of 31.22 µN to DI water and 13.38 µN to propylene carbonate (PC). This driving force is sufficient to detach the sample from the top cover and pull the sub-droplet from the parallel plate structure for DI water, PC and polyethylene glycol diacrylate (PEGDA) buffer. The novel EWOD system also possesses the advantage of precise volume control for liquid samples; the volume error of the generated droplet can be controlled within 0.1% to 2%.

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and

dimensions and integrated with the contact angle [ 10 , 11 ], as shown in Figure 3 b.…”

Section: Methodsmentioning

confidence: 99%

A Novel EWOD Platform for Freely Transporting Droplets in Double and Single-Plate Structures

Chang,

Huang,

Yao

2024

Micromachines

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Effects of biodegradable dispersants on the separation flotation of chalcopyrite and serpentine

Yang,

Liu,

Liu

et al. 2024

Advanced Powder Technology

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Long range self-transport of liquid droplets driven by electric field and roughness gradient

Zhang,

Guo

2024

Chemical Engineering Journal

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Droplet detachment force and its relation to Young–Dupre adhesion

Abstract: Droplets adhere to surfaces due to their surface tension g and understanding the vertical force Fd required to detach the droplet is key to many technologies (e.g., inkjet printing, optimal...

Cited by 5 publications

References 37 publications

A Novel EWOD Platform for Freely Transporting Droplets in Double and Single-Plate Structures

A Novel EWOD Platform for Freely Transporting Droplets in Double and Single-Plate Structures

Effects of biodegradable dispersants on the separation flotation of chalcopyrite and serpentine

Long range self-transport of liquid droplets driven by electric field and roughness gradient

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