Robust bidirectional continuous electrowetting based on metal–semiconductor (M–S) diodes

Ni, Qi; Capecci, Daniel E.; Schlafly, Millicent; Crane, Nathan B.

doi:10.1007/s10404-016-1788-0

Cited by 5 publications

(3 citation statements)

References 25 publications

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“…Manipulating droplet wetting can be useful for numerous tasks such as transporting or separating solid objects [1][2][3][4]. Most coating and bonding processes also depend on wetting conditions.…”

Section: Introductionmentioning

confidence: 99%

Volume and Frequency-Independent Spreading of Droplets Driven by Ultrasonic Surface Vibration

Trapuzzano

Tejada-Martínez

Guldiken

et al. 2020

Fluids

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Many industrial processes depend on the wetting of liquids on various surfaces. Understanding the wetting effects due to ultrasonic vibration could provide a means for changing the behavior of liquids on any surface. In previous studies, low-frequency surface vibrations have been used to alter wetting states of droplets by exciting droplet volume modes. While high-frequency (>20 kHz) surface vibration can also cause droplets to wet or spread on a surface, this effect is relatively uncharacterized. In this study, droplets of various liquids with volumes ranging from 2 to 70 µL were vibrated on hydrophobic-coated (FluoroSyl) glass substrates fixed to a piezoelectric transducer at varying amplitudes and at a range of frequencies between 21 and 42 kHz. The conditions for contact line motion were evaluated, and the change in droplet diameter under vibration was measured. Droplets of all tested liquids initially begin to spread out at a similar surface acceleration level. The results show that the increase in diameter is proportional to the maximum acceleration of the surface. Finally, liquid properties and surface roughness may also produce some secondary effects, but droplet volume and excitation frequency do not significantly change the droplet spreading behavior within the parameter range studied.

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Section: Introductionmentioning

confidence: 99%

Volume and Frequency-Independent Spreading of Droplets Driven by Ultrasonic Surface Vibration

Trapuzzano

Tejada-Martínez

Guldiken

et al. 2020

Fluids

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“…Some of these cooling techniques use nanofluids as their cooling medium to help cool down the solar panels. This is due to the nature of the nanoparticles within the fluids having higher thermal conductivity [9]. This makes them a good potential to be used as a cooling fluid.…”

Section: Literature Reviewmentioning

confidence: 99%

Active cooling system for solar panels with silver nanofluid and water

Deivakumaran,

Chua,

Koh

2023

IOP Conf. Ser.: Earth Environ. Sci.

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Solar panel is used to harvest solar energy through the photovoltaic panels to generate electricity. Due to the different intensity of the sun, the panel may be getting overheated during the operation which affect the performance. The research was conducted to analyse the efficiency of liquid immersion cooling technique with water, measure the differences of water and nanofluids under the liquid immersion technique, and determine the efficiency increase of the cooling system with additional cooling. The apparatus was set up to test the cooling system performance throughout the most active part of the day with sunlight. The collected data has shown an increase in the power efficiency of 12.66% in favour of silver nanofluid compared to water when the cooling system is attached with additional cooling capabilities. However, without the additional cooling capabilities, the difference in power output between silver nanofluid and water shows around 2.42% in favour of silver nanofluid. The use of nanofluid in this experiment indicates a noticeable increase in power efficiency through the ability to keep the panel better cooled throughout the day. This allows nanofluids to be used as a cooling fluid to remove heat form the solar panel.

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“…The introduction of nonlinear circuit elements enabled the continuous droplet actuation. For example, embedded diodes achieved continuous droplet motion using induced electro-osmotic and electrowetting effects. − …”

Section: Introductionmentioning

confidence: 99%

Continuous Droplet-Actuating Platforms via an Electric Field Gradient: Electrowetting and Liquid Dielectrophoresis

et al. 2021

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This work develops a technology for actuating droplets of any size without the requirement for high voltages or active control systems, which are typically found in competitive systems. The droplet actuation relies on two microelectrodes separated by a variable gap distance to generate an electrostatic gradient. The physical mechanism for the droplet motion is a combination of liquid dielectrophoresis and electrowetting. Investigating the system behavior as a function of the driving frequency identified the relative contribution of these two mechanisms and the optimum operating conditions. A fixed signal frequency of 0.5 kHz actuated various liquids and contaminants. Droplet actuation was demonstrated on several platforms, including linear, radial-symmetric, and bilateral-symmetric droplet motion. The electrode designs are scalable and can be fabricated on a flexible and optically transparent substrate: these key advancements will enable consumer applications that were previously inaccessible. A self-cleaning platform was also tested under laboratory conditions and on the road. This technology has significant potential in microfluidics and self-cleaning platforms, for example, in the automotive sector to clean body parts, camera covers, and sensors.

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Robust bidirectional continuous electrowetting based on metal–semiconductor (M–S) diodes

Cited by 5 publications

References 25 publications

Volume and Frequency-Independent Spreading of Droplets Driven by Ultrasonic Surface Vibration

Volume and Frequency-Independent Spreading of Droplets Driven by Ultrasonic Surface Vibration

Active cooling system for solar panels with silver nanofluid and water

Continuous Droplet-Actuating Platforms via an Electric Field Gradient: Electrowetting and Liquid Dielectrophoresis

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